get help in general - we have more specialized help rooms here: https://gitter.im/FreeCodeCamp/home
what up yall ;)
@daddycardona NodeJs with Express, but facebook took over
LOL
Yeah i am not even close to looking into node ;)
@daddycardona It's not too difficult. There are a few concepts to grasp but once you get them it's ok. I've done the NodeJs challenges but I'm going through some courses on Pluralsight.
@JohnnyBizzel
@JohnnyBizzel I am trying these challenges and trying to use the regex man is that confusing to me but I am almost getting the hang of it, however I am thinking about going to lynda or treehouse more so treehouse I only heard good things from them :)
No I was using a different one
There are a few out there.
It takes time to get used to regex. Totally different language!
but I have heard many youtube users use regex101 so I might have to try it lol
I see lol
be back later about to eat and watch a show :)
@daddycardona Take it easy. I'm going to bed now. zzzz
hellow fam
i got the solution correct now
but i have a question
my first solution is this. i got the requirements correct except for the other one.bob instanceof Person should return true. im getting this incorrect.
my first solution:
/*var first = firstAndLast.split(' ')[0];
var last = firstAndLast.split(' ')[1];
return {
getFullName: function() {
var fullName = first + ' ' + last;
return fullName;
},
getFirstName: function() {
return first;
},
getLastName: function() {
return last;
},
setFirstName: function(newFirst) {
first = newFirst;
},
setLastName: function(newLast) {
last = newLast;
},
setFullName: function(newFullname) {
first = newFullname.split(' ')[0];
last = newFullname.split(' ')[1];
//firstAndLast = newFullname;
}
};*/
var bob = new Person('Bob Ross');
bob.getFullName();but on my 2nd solution
this is my 2nd solution i got everything correct. i just used the .this keyword. i dont know why. i just followed the given sample that was initialize
var Person = function(firstAndLast) {
var fname = firstAndLast.split(' ')[0];
var lname = firstAndLast.split(' ')[1];
//Complete the method below and implement the others similarly
this.getFullName = function() {
var fullname = fname + ' ' + lname;
return fullname;
};
this.getFirstName = function() {
return fname;
};
this.getLastName = function() {
return lname;
};
this.setFirstName = function(newFirst) {
fname = newFirst;
};
this.setLastName = function(newLast) {
lname = newLast;
};
this.setFullName = function(newFull) {
fname = newFull.split(' ')[0];
lname = newFull.split(' ')[1];
};
};
var bob = new Person('Bob Ross');
bob.setFullName('bruh haa');
bob.getFullName();
hey guys how to change the font size of an element?
plz
css-selector {font-size: 1em;}
ok thanks
evening fCC
how goes the coding?
@DarrenfJ ok here, do you know fiddler?
@DarrenfJ how goes it for you?
naw... what is it? some kinda sandbox?
goodGood. quiet night.. gonna go do some codecademy exercsies or something :D
@DarrenfJ it's a network sniffer type of tool, like wireshark
brownies for helping out above though
thanks @GitHub-Henry
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what are yah doing with it? You learning networks?
thanks, good luck with your exercises
@DarrenfJ it let's you intercept api requests
working with api's
cool
what're you trying to do?
just curious
@DarrenfJ i'm getting a security error from an api when i start using fiddeler, i wondered what i needed to do to stop fiddler from triggering the security error.
seems like the api detects the 'man in the middle' security breach, which is what fiddler is doing.
good for the api, bad for debugging
not that i have a problem, just wanting to use the tool
@DarrenfJ :wave:
@GitHub-Henry ah cool... sounds like a challenge
manish! :D
saw your outing pics, very nice!
esp the lill doggos
oh yah.. we had a chance last minute to grab a cottage..
i am here
actually called Bob's lake
the lake, of bob
and i owe yah a thank from yesterday i missed
thanks @Manish-Giri
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niice
not far from Rochester in NY
also, @GitHub-Henry i love how you eightball the casual room ;)
in fact if I get to rochester, bet I could swim the lake and cross over to where you're at
:wink:
@DarrenfJ ty
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@DarrenfJ also, congratulations on crossing 600 days
:tada:
is eightball the source of wisdom?
@DarrenfJ eightball doesn't always answer, oh well.
@DarrenfJ thanks
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eightball is python the future
@Manish-Giri :8ball: outlook not so good :sparkles:
fk
(problem solved)
eightball is the future of balls, of eight
@DarrenfJ :8ball: concentrate and ask again :sparkles:
eightball are you the source of wisdom?
@GitHub-Henry :8ball: yes. Definitely :sparkles:
:D
ooo, brb, puppies are antsty for walk.. also.. probably smell beavers or bears or something and want to explore
ok back
it's hella dark out here with no city lights
how do you even have internet there
lol
i have no cell reception but actually pretty good internet
weird right?
lol
yeah
quite
@DarrenfJ no view of a zillion stars and milky way galaxy?
oh yah.. but there's a lot of tree cover you have to get right out to the dock to see that...
@DarrenfJ My favorite thing is to go into the woods in mid-August, that's when you can look up and see myriads of meteors (ok, only 80 per hour), during the Perseid meteor shower.
@GitHub-Henry oh yah i have friends who get a bunch of people together and leave Toronto for the woods to watch it every year
@DarrenfJ it's pretty cool to watch the ones that span the horizon, something special about it.
will have to go with them next time.. i haven't seen the meteor shower for a quite a few years now
@GitHub-Henry thanks for the chat.. i'm off to sleep.. have a ton of cottagre related stuff to do tomorrow
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and thanks @Manish-Giri for the corgi vids :D
darrenfj sends brownie points to @manish-giri :sparkles: :thumbsup: :sparkles:
api offline
@DarrenfJ thanks, good night, & enjoy the lake.
:D
Hi! I am trying to implement bootstrap navbar. I want my logo to be center aligned which I am not able to achieve. Can anyone please suggest the solution. Please check my code: https://codepen.io/Bhoomi/pen/QqKRQm
@Bhoomi-Github It depends on how you want it to look. You might try this suggestion
https://codepen.io/3lhagvaasuren/pen/xXEoZV
guys help me. in this code i cant access to body in css.
guys help me. in this code i cant access to body in css.
@3lhagvaasuren looks like the css you have for body is only a black background. and the background appears to be black
What else are you trying to do with it?
function spinalCase(str) {
// "It's such a fine line between stupid, and clever."
// --David St. Hubbins
var a = " ",
b = "-",
newStr = "";
for (var i = 1; i< str.length; i++){
if (str[i] === str[i].toUpperCase() && str[i-1] !== a){
newStr = str.slice(0,i);
}
}
return newStr; //AllThe-small
}
spinalCase('AllThe-small Things');AllThe-small and not All? according to my conditions it should be looking for uppercase letters not preceeded by a space and then slice until the Uppercase letter...
@rscales02 I suggest you use regexp
@rscales02 if you want to learn regexp https://regexone.com/ and https://www.youtube.com/playlist?list=PLfdtiltiRHWGRPyPMGuLPWuiWgEI9Kp1w and https://regexr.com/ are good tools to use.
I was starting to move in that direction...
Anyone around?
I'm having trouble with node
I might be able to help @bookofbash
What's the problem?
@rscales02 You do know you are not checking when
i=0 so it is not checking for A in the All
const fs = require("fs");
const path = require("path");
const ext = "extType."+(process.argv[3]);
const extname = path.extname(ext);
const directory = '/tmp/_learnyounode_3885';
fs.readdir( directory, function callback(err,files){
files.forEach(function(file) {
console.log(file);
});
});
I am trying to filter by extension, but I cant even get the files to print before filtering them
I am just trying to find the
T and put in a space between All and The
@rscales02 you do know
str[i-1] !== a will be true for every character other than space
@bookofbash Add
before the forEach to see if you get an error
if (err) {
throw err;
}before the forEach to see if you get an error
yeah, so I am looking for the
uppercase letters not preceeded by a space in the example AllThe-small Things that would be T
(at least the first
T...)
@Justin25 ok
Did it give an error
Yea, no such file in directory
I figured it out thanks. my directory name was changing because thats how learnyounode works. So, I was using a directory that didnt exist
fs.readdir( directory, function callback(err,files){
if (err){throw err;}
files.forEach(function(file) {
console.log(file);
});
});
@Justin25 is it considered good practice to put the if (err) {throw err;}?
Yes, that way you know if something went wrong
@rscales02 try throwing a break in there
@rscales02 like
function spinalCase(str) {
// "It's such a fine line between stupid, and clever."
// --David St. Hubbins
var a = " ",
b = "-",
newStr = "";
for (var i = 1; i< str.length; i++){
if (str[i] === str[i].toUpperCase() && str[i-1] !== a){
newStr = str.slice(0,i);
break;
}
}
return newStr; //AllThe-small
}
nice, thanks @heroiczero !
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thanks @Justin25 Helped a bunch I just finished the exercise. Now on to the next one
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Got to love writing code that only works for on case in particular lol
@rscales02 You mean all of my code?
Haven't seen all of yours, but definitely most of mine!
Lol, I've been trying to get better at making reusable code, but it's definitely going to take some time.
any idea how to insert dashes so
thisIsSpinalTap becomes this-Is-Spinal-Tap? I have figured out how to spot it with /[a-z][A-Z]/ but I can't think how to put those dashes in
the only thing I can think of is to
slice(0, str.search(/[a-z][A-Z]/)) + "-", but I can't figure out how to loop through the str for each case...
@rscales02 isn't str.replace or str.split better option?
I can't figure out what to
replace with. Let me play with split and concat I guess...
@rscales02 in replace you can use backreference
@rscales02 https://stackoverflow.com/a/2447975/1412452
much closer... thanks @korzo
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got it! I cannot believe that what has taken me about 6 hours to figure out is literally 2 lines of code though :laughing:
@rscales02 And you can use backreference even without function like
and $1 will be replaced with result from () in regex
str.replace(/your regex/g, '$1')and $1 will be replaced with result from () in regex
newStr = str.replace(matches, "$1 $2").replace(/\s/g, b).replace(/_/g, b)
someone plz help me
how am i gonna learn json and ajax????????
how am i gonna learn json and ajax????????
@dmithun I guess it's with Jquery library, just google or search on youtube for "jquery json tutorial"
i searched about it but not getting enough resource :(
@dmithun this 2 links, it's basicly all you need for fcc json/ajaq related exercises:
http://api.jquery.com/jquery.getjson/
http://api.jquery.com/jquery.ajax/
http://api.jquery.com/jquery.getjson/
http://api.jquery.com/jquery.ajax/
thanks @artbohr :)
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@dmithun - I had a link that I saved with some tutorial videos, so I'll share that with you. Have a look at this page and good luck! Come back after you get a little insight with specific questions and you'll get help.
Can anyone tell me if I'm heading in the right direction with this? I need to remove the values in arr that match any of the args.
function destroyer(arr) {
// Remove all the values
var args = Array.prototype.slice.call(arguments);
var newArray;
newArray=arr.filter(function(args){
for (var i=0; i < arr.length; i++) {for (var j=1; j < args.length; j++)
return arr[i] != args[j]; }
});
return newArray;
}
destroyer([1, 2, 3, 1, 2, 3], 2, 3);
@mbmontana No. args in filter callback is element of arr
function smallestCommons(arr) {
var nextArr = [],
total = arr[0];
arr = arr.sort(function(a,b){return b-a;});
for (var x = arr[0]; x >= arr[1]; x--){
nextArr.push(x);
} console.log(nextArr);
for (var y = 1; y < nextArr.length; y++){
total = nextArr[y]*total/gcd(nextArr[y],total);
}
return total;
}
function gcd(x,y){
var newArr = [];
for (var i = 1; i < y; i++){
if (x%i == 0 && y%i == 0)
newArr.push(i);
}
return newArr[newArr.length-1];
}
smallestCommons([5,1]);nextArr gets logged in my console 7 times the first 5 times they return identical [5, 4, 3, 2, 1], followed by [13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1] and [23, 22, 21, 20, 19, 18]
@korzo Yeah I don't know what to put for the callback of the filter function. Would the function work if I leave the parentheses empty?
@mbmontana You put name of the variable in the parenthesis and this variable will hold current element of arr
@mbmontana In your code args will be 1, 2, 3 ...
@mbmontana in args put only rest of the arguments except arr (add one argument to slice)
@mbmontana
var args = Array.prototype.slice.call(arguments/*, ???*/);
return arr.filter(function(element) {
// find if element is in args and return true/false
});
also why does that not work for
[1,5] when I get identical logs in my console?
@rscales02 because of tests
@rscales02
smallestCommons([1, 5]) should return a number.
smallestCommons([1, 5]) should return 60.
smallestCommons([5, 1]) should return 60.
smallestCommons([1, 13]) should return 360360.
smallestCommons([23, 18]) should return 6056820.
plus 1 in editor
Got it fixed :smile: !
and now I understand that too!
thanks @korzo !
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@rscales02 it was meant as answer to
why nextArr gets logged in my console 7 times
yup, I picked up on that
I think there is a cleaner way to do that algorithm with recursion, but I can't quite wrap my head around that
@rscales02 I ended up with this and it's 100x faster
// 100x faster
function smallestCommons(arr) {
arr = arr.sort((a, b) => a-b);
var gcd = (a, b) => a % b === 0 ? b : gcd(b, a % b); // Greatest Common Divisor
return Array(arr[1] - arr[0] + 1)
.fill(0)
.map((e, i) => arr[0] + i) // Create range
.reduce((a, e) => (a * e)/gcd(a, e)); // Least Common Multiple
}
But I googled a lot as I had math last time 20 years ago :)
non-math version was:
function smallestCommons(arr) {
arr = arr.sort((a, b) => a-b);
var range = Array(arr[1] - arr[0] + 1).fill(0).map((e, i) => arr[0] + i),
res;
do {
res = arr[1] * arr[0]++; // we don't need arr[0] anymore
} while(!range.every((e) => res % e === 0));
return res;
}
How long have you been at this? I don't really understand any of that code lol
@rscales02 maybe 2 hours.
I started with second version, but it was slow, so I googled GCD, found some explanation with pseudo code
and replicated it using recursion. It uses variable swap
I started with second version, but it was slow, so I googled GCD, found some explanation with pseudo code
and replicated it using recursion. It uses variable swap
It was probably hardest challenge for me
with your
var gcd does that do the same as my function gcd?
I think so, but using recursion instead of loop
any resources you would recommend to understand recursion better?
if b is 0, return b otherwise replace b with a % b and try again
I meant how long have you been learning coding? You seem about 12 steps over my head with those answers...
@rscales02 Recursion is very hard to grasp.
Best way is to play with it a lot.
Generally you can replace most of the counting/testing loops with recursion.
for example, here is your yesterday's code replaced with recursion
Best way is to play with it a lot.
Generally you can replace most of the counting/testing loops with recursion.
for example, here is your yesterday's code replaced with recursion
function sumPrimes(num) {
return num < 2 ? 0 : isPrime(num)*num + sumPrimes(--num);
}
function isPrime(n, m) {
m = m || Math.floor(Math.sqrt(n));
return m < 2 ? true : n%m !== 0 && isPrime(n, --m);
}
sumPrimes(10);
@rscales02 I usually do 2 solutions for every challenge. I normal and one crazy using recursion/functional programming...
@korzo Here's where I am now. I'm getting a syntax error saying "element.includes is not a function."
function destroyer(arr) {
// Remove all the values
var args = Array.prototype.slice.call(arguments, 1);
var newArray;
newArray=arr.filter(function(element){
for (var i=0; i < args.length; i++)
{if (element.includes(args[i])) {return false;} else {return true;} }
});
return newArray;
}
destroyer([1, 2, 3, 1, 2, 3], 2, 3);
@mbmontana You are using filter on arr
It's the same as [1, 2, 3, 1, 2, 3].filter()
It means that element will be :
First time 1
second time 2,
...3, 1, 2....
It's the same as [1, 2, 3, 1, 2, 3].filter()
It means that element will be :
First time 1
second time 2,
...3, 1, 2....
@mbmontana
args[i] will be 2 and 3
@mbmontana but you are close
@korzo any chance you can translate this
return num < 2 ? 0 : isPrime(num)*num + sumPrimes(--num); to natural language for me I do not follow what it is actuall calling/testing/returning...
Are you returning 0 if num<2?
what does
: imply?
@rscales02
It's part of ternary operator
(condition) ? true: false
It's part of ternary operator
(condition) ? true: false
@rscales02
console.log(1 === 1 ? 'true': 'false');
@korzo I did {if (element === args[i]) {return false;} else {return true;} }
}); But that still returns [1, 3, 1, 3] When the loop iterates to 3 it stops on args[0]
}); But that still returns [1, 3, 1, 3] When the loop iterates to 3 it stops on args[0]
@rscales02
If num is 1, return 0
Otherwise if num is prime , call sumPrimes with num -1 and sum result
return num < 2 ? 0 : isPrime(num)*num + sumPrimes(--num);If num is 1, return 0
Otherwise if num is prime , call sumPrimes with num -1 and sum result
isPrime returns a true or false, right?
@rscales02 isPrime returns boolean. It converts to either 1 or zero
It means that for primes it's num x 1 and for not primes num x 0
It means that for primes it's num x 1 and for not primes num x 0
isPrime(num)*num
so not primes are 0
ok that makes more sense I guess, my head is swimming though
falsely inflated ego back to destroyed though... I still know less than nothing :smile:
@rscales02 for 4 it's basically
sumPrimes(4) + sumPrimes(3) + sumPrimes(2) + sumPrimes(1)
or
isPrime(4)*4 + isPrime(3)*3 + isPrime(2)*2 + 0
function findElement(arr, func) {
var num = 0;
for (var i = 0; i< arr.length; i++){
num = arr[i];
if (func === true){
break;
}
}
return num;
}
findElement([1, 2, 3, 4], function(num){ return num % 2 === 0; });func incorrectly here?
@rscales02 yes
@rscales02 func is function
so
func(arr[i])
@rscales02 try it with recursion :)
but filter is best fit for that
You have completely fried my brain for the day, I think...
@rscales02 come on, this is the simple one
you literally have it with 1 line change
That line change somehow has to include 5 other lines of code though
@rscales02 Code you posted needs 3 changes to pass all the tests
fix func call
replace break with something better
fix last return
fix func call
replace break with something better
fix last return
I got the code to work... just looks like shit and I basically call func twice. No idea how to put it into recursion
what are other options than break?
@rscales02 return num;
@rscales02 and return undefined after loop
doesn't seem to need
return unefined...
function findElement(arr, func) {
var num = 0;
for (var i = 0; i< arr.length; i++){
if (func(arr[i]) === true){
num = arr[i];
return num;
}
}
}
findElement([1, 3, 5, 9], function(num) { return num % 2 === 0; });
Can you recommend any resources to better understand recursion and functional programming better?
@rscales02 Oh, you are right. but technically, you return undefined as you returns nothing :)
@rscales02 you should take a look at all array methods.
you are solving challenges with loops, when array methods are much better option.
also array methods are functional programming as you pass function as argument
you are solving challenges with loops, when array methods are much better option.
also array methods are functional programming as you pass function as argument
your variable num is inside the function find element so when you calling
fucntion(num) it can't understand what num is because it is undefined outside the function findelement
@rscales02
@daddycardona num in function and num at the bottom are not the same.
@daddycardona Upper one is variable, at the bottom it's parameter of function
I see that now
but how is he calling the function then it haves a function to call within that function
@rscales02 for example this challenge can be solved in one line using filter
@daddycardona you can pass function as a argument in javascript
I know that @korzo just looks confusing to me how its done her
here lOL
so something like
num = arr.filter(func())
but how do I pass each number from the array into the
func?
arr.filter does that for you so
arr.filter(function(arg){}):
@rscales02 Yes,
function findElement(arr, func) {
return arr.filter(func)[0];
}
or you can do it like that :)
@rscales02 func accepts one argument so have the same signature as filter's callback
and returns true/false
You are blowing my fucking mind man...
@rscales02 that's hardest part of functional programming/recursion...to get it :)
damn thanks @korzo you helped me understand this recursion a little better :)
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@daddycardona @rscales02 here is you code using recursion
function findElement(arr, func) {
if(func(arr[0]) === true) {
return arr[0];
}
if(arr.length === 1) {
return undefined;
}
return findElement(arr.slice(1), func);
}
question for you @korzo
let newStr = str.replace([/</g], changeIt); change it is a function why is it not letting me console.log it?
Yeah thanks for trying to help me understand better @korzo , I clearly have a long way to go before I actually get it I think. Although you have shown me that I need to completely rethink my approach...
forloops were the one thing I actually understood how to use and now I have to get rid of them :frowning:
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function convertHTML(str) {
var newStr = str.replace([/</g], changeIt);
console.log(newStr)
return;
}
function changeIt(words) {
console.log(words)
return 'it';
}
convertHTML("Hamburgers < Pizza < Tacos"); // thewhole code
@daddycardona I don't think you are calling
changeIt try adding ()
Okay
@rscales02 well, array methods are practically for loops, but with cleaner code and you can chain them
for loops are way to go if you need to return from inside the loop or performance is important
for loops are way to go if you need to return from inside the loop or performance is important
@daddycardona it's ok, str.replace accepts function as 2.argument @daddycardona
@daddycardona just your regex needs some work
I did that but now words is Undefined and when I add at (words) it became an error I thought it would catch on to that?
my regex sux i am just learning lol
I know the /g means all the instances of this < lol
so @korzo should I put that function in the other function?
@daddycardona function has more arguments then just words
try to console.log(arguments)
try to console.log(arguments)
@daddycardona with regex /(<) (\w+)/g
why should I need all that I am just trying to replace the <
@daddycardona Oh, I thought you should return <pizza></pizza>
I thought if I used the [] i would be good
no I am trying to replace the < with <
<
i you do
< without the ''` you get <
@daddycardona then /</g id ok
but check arguments on function changeIt
but check arguments on function changeIt
that is what I am confused about I can't put
changeIt() because it looks up nada in the parameters
@daddycardona of curse, it will replace it with "it";
so if I add the function changeIt inside the function it now recognizes is as a function
nope does not do any of that
@daddycardona nope, you had it right
str.replace([/</g], changeIt);
just regex is wrong
I am just using this
what is wrong with it I am confused
@daddycardona your function changeIt has more arguments as just words.
Check https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/replace#Specifying_a_function_as_a_parameter
Check https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/replace#Specifying_a_function_as_a_parameter
@daddycardona Thats' why I said add console.log(arguments) at the start
okat so I should of used the words match?
@daddycardona the name doesn't matter
@korzo I did that but it is not running the function
You guys have fun... 7 hours straight and I am fried... thanks for taking all the extra time for me @korzo
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console.log(arguments) is not running the function at all
@daddycardona you can have
function changeIt(lol, wtf, lmao) {
console.log(lol, wtf, lmao);
}
LMAO
I know that why I am confused wht change it is not workign at all
@daddycardona post your actual code
@rscales02 glad to help. See you
function convertHTML(str) {
var newStr = str.replace([/</g], changeIt);
console.log(newStr)
function changeIt(words) {
console.log(arguments + 'words')
return 'it';
}
return newStr;
}
convertHTML("Hamburgers < Pizza < Tacos");
so I changed
replac("<", changeIt ) and it does the first one so something is wrong with my regex
@daddycardona words === arguments[0]
what I'm trying to say is that function changeIt has more arguments that "words"
what I'm trying to say is that function changeIt has more arguments that "words"
Okay I read that but isn't that why you use the /g but either way it did not call on words at all the other way
@daddycardona
arguments is argument object holding all parameters passed to function
@daddycardona because your regex is wrong
[/</g]
change it to
/</g
@korzo or
/[<]/g
okay but now I am about to change that to [<>"'] so I can change all of these
oh okay
@korzo that was what I was about to do next /[]/
once again you are a hero in this help :)
thanks @korzo
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that did the trick I think :)
well it got all the < to it lol
@daddycardona [] means group of characters to search for
yes :)
I have to do a challenge and it says we should try using regex so this is my first episode of this painful process @korzo
when you kept saying it's wrong I was like wth you talking about it's wrong until right before you posted /[]/ I was like oh maybe he means that my [/ is backwards and then bam you like /[ you dumb ass lmao I know you didn't say that but it makes the story sound better lol
@daddycardona :)
@korzo Do I have to nest another for loop into this? I can't get the loop to iterate to the second args element.
function destroyer(arr) {
// Remove all the values
var args = Array.prototype.slice.call(arguments, 1);
var newArray;
newArray=arr.filter(function(element){
for (var i=0; i < args.length; i++)
{if (element === args[i]) {return false;} else {return true;} }
});
return newArray;
}
destroyer([1, 2, 3, 1, 2, 3], 2, 3);
@mbmontana you can use args.indexOf or args.includes instead of loop
@korzo Thanks!
function destroyer(arr) {
// Remove all the values
var args = Array.prototype.slice.call(arguments, 1);
var newArray;
newArray=arr.filter(function(element){
if (args.includes(element)) {return false;} return true;
});
return newArray;
}
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code to reverse a string. I have no idea why it's giving me an error
var s1,j;
function reverseString(str) {
var j=str.length;
for(var i=0;i<j;i++)
{
s1[i]=str[j];
j--;
}
str=s1;
return str;
}
reverseString("hello");
why do you declare s1 and j outside your function ?
yeah
@Gersho let me get that right
@Gersho I'm getting type error now
is
s1 supposed to be an array?
@kiranjd
YES
then you need to declare it as such
otherwise it just starts out as
undefined
then in your first loop iteration, you try to do
undefined[0] which throws TypeError
yes that the exact error i got
so do
var s1 = [] at the beginning
yes. It's working
@Manish-Giri thank you
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:+1:
function reverseString(str) {
var s1 = [];
var j=str.length-1;
for(var i=0;i<str.length;i++)
{
s1[i]=str[j];
j--;
}
str=s1.join("");
return str;
}
reverseString("hello");
here's a shortcut -
function reverseString(str) {
return str.split('').reverse().join('');
}
okay
that's good. Thanks
regex for matching only alphabets?
google is the best way to figure out unknown regex
https://www.freecodecamp.org/challenges/using-objects-for-lookups
// Setup
function phoneticLookup(val) {
var result = "";
// Only change code below this line
var phoneticLookup = {
alpha:"Adams",
bravo:"Boston",
charlie:"Chicago",
delta:"Denver",
echo:"Easy",
foxtrot:"Frank"
};
// Only change code above this line <---- WHY I NEED TO CHANGE RETURN?
return phoneticLookup[val];
}
// Change this value to test
phoneticLookup("charlie");
its written that need to change code above this line. But i had to edit return command. I did something wrong?
hey guys, I'm trying to get the click and drag functionality to work in my project and I need a little help. I followed a tutorial on here: https://code.tutsplus.com/tutorials/create-an-html5-canvas-tile-swapping-puzzle--active-10747 (I'll be modding and adding to it later) and was trying to merge it with the code I already have, and I was successful up until I implemented the onPuzzleClick(e) and updatePuzzle() functions. I know it has to do with my img variable within ctx.draw method in those two functions, but I'm not sure exactly how to resolve it. I suspect it has to do with my populator function, but I tried calling that function in the ctx.draw method instead of having img and it wouldn't work
https://codepen.io/AmitP88/pen/pWyaNY?editors=0010
https://codepen.io/AmitP88/pen/pWyaNY?editors=0010
@lydatech Thank you
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@AugustasV Not really wrong. The expectation was you would write
So the existing
result = phoneticLookup[val];So the existing
return result; would not need to change
hey guys there is an issue with deploying my project to the web i am using vim and surge .sh to deploy it is it my file issue or what because it gives me a link but it looks like it is publishing an empty folder and the link does not exist
There is no help for these tasks? https://www.freecodecamp.org/challenges/accessing-nested-objects
didnt it introduce you to objects before @AugustasV ?
hmm interesting
"The sub-properties of objects can be accessed by chaining together the dot or bracket notation."
he means there si no hint page
is
@tiagocorreiaalmeida
myStorage.car.inside.["glove box"]; // Change this lineat https://www.freecodecamp.org/challenges/accessing-nested-objects why this not working?
"Access the myStorage object and assign the contents of the glove box property to the gloveBoxContents variable."
var gloveBoxContents = ""; // Change this line
problem is with ["glove box"] it cant be in this way?
oh -_- thanks @tiagocorreiaalmeida
hello anyone who knows a js code that remove the js apllies to the body so in that way all the body have the js applied expect the section we choose not to
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@AugustasV you have to set the value taht comes from that object protprety to the variable they jsut gave you
@tiagocorreiaalmeida i do something wrong?
var gloveBoxContents = "myStorage.car.inside.[glove box]";
2 things you dont need a double quote around it, its not a string its an object you are acessing
so start by removing the double quotes
second
the glove box inside the[]
need some double quotes since its a string you are acessing
"glove-box"
oh thats the thing why in example they have it
could anyone tell me how to sreat my own custom domain
create