get help in general - we have more specialized help rooms here: https://gitter.im/FreeCodeCamp/home
thanks to all the regulars for hanging out and helping out
thanks @Manish-Giri @Gersho @GitHub-Henry @faraco @sjames1958gm @daddycardona @ericmiller777 @alexanderkopke @thekholm80
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@DarrenfJ no, thank you
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@DarrenfJ no, thank you
i didn't notice the comma at first lol
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lol i had to actually retype it for just that reason
xD
@mbmontana a great article about just that (AJAX being too easy in fCC) https://medium.com/p1xts-blog/if-you-are-struggling-with-the-freecodecamp-intermediate-projects-9f7fe943601c funny plus with links to more detailed learnings
nothankyou ;)
@DarrenfJ ty
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@DarrenfJ thanks for the brownies
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:point_up: October 6, 2017 7:07 AM @DarrenfJ ty
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```
ctx.rect(window.innerWidth / 2,window.innerHeight / 2,60,120);
I do not understand why x.domain is throwing a typeerror in this code. y.domain functions just fine, so I do not get why x.domain is not following suit. I am almost certain it is not a typographical issue: https://codepen.io/sosmaniac/pen/WZZpLJ/?editors=0110
@Kingwindie center a <canvas> element just like an image. Use text-center on the parent, or make it a block element and use margin-left/right auto
@piteto thanks
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canvas.parentNode.style.textAlign = "center"
@knight2
does the FCC beta npm tests work for anyone?
https://beta.freecodecamp.org/en/challenges/managing-packages-with-npm/how-to-use-packagejson-the-core-of-any-nodejs-project-or-npm-package
https://glitch.com/edit/#!/rapid-tune?path=package.json:18:1
Submitted that, says package.json should have a valid "author" key
does the FCC beta npm tests work for anyone?
https://beta.freecodecamp.org/en/challenges/managing-packages-with-npm/how-to-use-packagejson-the-core-of-any-nodejs-project-or-npm-package
https://glitch.com/edit/#!/rapid-tune?path=package.json:18:1
Submitted that, says package.json should have a valid "author" key
```
{
"name": "fcc-learn-npm-package-json",
"dependencies": {
"express": "^4.14.0"
},
"main": "server.js",
"scripts": {
"start": "node server.js"
},
"engines": {
"node": "4.4.5"
},
"repository": {
"type": "git",
"url": "https://idontknow/todo.git"
},
"author": "Author"
}
repost from 4 hours ago
@knight2 I haven't done that challenge, but from looking through package.json files on my local computer, properties are listed alphabetically, and "author" has a "name" property
for eslint, for example:
"author": {
"name": "Nicholas C. Zakas",
"email": "nicholas+npm@nczconsulting.com"
},
According to this, the
name field is required, email is optional. https://docs.npmjs.com/files/package.json#people-fields-author-contributors
evening fCC
@DarrenfJ hello
@DarrenfJ :wave:
@Manish-Giri @DarrenfJ @longnt80 @GitHub-Henry TY @piteto @Gersho @faraco :)
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@heroiczero thank you for the brownies
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@heroiczero ty :)
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hello!
anyone done the chunky monkey challenge?
@Seahchye Yes.
@Seahchye - yes on chunky monkey- are you making progress?
@khaduch yea, i can slice the array
but dont quite understand how to form another array
@Seahchye push onto an empty array.
var result = [];
result.push(/*Slice from array*/);
@Seahchye You'll need some sort of loop
@Seahchye - yes, exactly what @sjames1958gm said - set up an empty array, and as you divide the input array into sub-arrays, just push those individual arrays onto the result.
@sjames1958gm @khaduch let me try
@Seahchye - the
.slice() should return arrays, so you then have those to .push() to the result array - post your code if you have more questions.
something like that or?
@khaduch @sjames1958gm corrected
@Seahchye - you'll need a loop to make sure that you process the entire input array - what you have would be returning the first "chunk"...
@khaduch yea i got the first chunk
@khaduch i try
@khaduch potential infinite loop at line 5
@Seahchye - you need to modify
i in your for loop - so you need i = i + size or i += size - otherwise your loop will not end!
@khaduch i see!
@khaduch what i get now
@Seahchye - the
end parameter that you pass to .slice() has to be a larger index than the start parameter - size will always be the same. You have to calculate some other value that is larger relative to the i value... that is, if your i is 2, you have a size of 2, you want end to be greater than 2.
@khaduch how can i do that?
@Seahchye - well, you are using i for the begin argument. And the end argument is related to the begin argument combined with size. And the documentation for .slice() says:
The
slice()method returns a shallow copy of a portion of an array into a new array object selected frombegintoend(endnot included). The original array will not be modified.
So you just calculate a value for end based on begin (which you are generating with i) and the size....
i will try again another time
thanks @khaduch @sjames1958gm for guiding me
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sheers
cheers
@Seahchye - okay - keep those hints and think about that solution later! Good luck!
@Seahchye :+1:
@DarrenfJ Just read it. Thanks. Is there a way to start at the beginning in Free Code Camp? Could I add an account with a different email address?
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This is cool. https://github.com/chubin/wttr.in
morning fCC
my usual thanks to the regulars :D thanks @GitHub-Henry @Marmiz @heroiczero @Manish-Giri @Gersho @faraco @khaduch @sjames1958gm keep coding and keep this place chill :D
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@mbmontana I think you can.. but you can also reset.. i can't remember how...
but what I would recommend is goto the map and go through the exercises resetting them before you do them again
or try out the early part of the beat (which doesn't save your progress or let you login but has more detail on each exercise)
@DarrenfJ - thanks to you, too - it's good to keep some life in this place... :)
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so I found out that
_.flatten(arr) would do what I need it to do for the steam roller exercise , unfortunately I can not use it because I can not use document.write(the site for underscore js) on the stupid fcc challenge dammit lol
thanks @GitHub-Henry @Marmiz @heroiczero @Manish-Giri @Gersho @faraco @khaduch @sjames1958gm
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and thanks @DarrenfJ
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@DarrenfJ So you mean go back to the earlier exercises and clear my code? ... Meanwhile, I'm taking a free Intro to Ajax course on Udacity to get a better understanding.
yes @mbmontana Ajax gets confusing before javascript I use to only use it for cleaning bathrooms lol
@mbmontana the beta links: (startes here but map is onthe left side) https://beta.freecodecamp.org/en/challenges/basic-html-and-html5/introduction-to-the-basic-html-and-html5-challenges
@daddycardona forgot to add you in there too thanks!
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thank you man
@mbmontana yah you can go back and reset exercises go get a coffee to let the short term memory of seeing your solution fade away and start in on it from scratch..
function steamrollArray(arr) {
// I'm a steamroller, baby
var flattened = arr.reduce(function(a, b) {
return a.concat(b);
}, []);
console.log(flattened)
//return x;
}
planning on doing this since my CSS is le sucktage: https://medium.com/p1xts-blog/lets-make-november-suck-less-at-css-month-7fa7c80b5387
@daddycardona - hi there neighbor - so where are you on the steamroller exercise?
it took me forever to figure that i needed the
},[] <--);
is that working?
well I am lost getting rid of the extra array on it like the `[[4]]1
so it's not working...
well it workes the result is
1
1
:
2
2
:
3
3
:
Array(1)
0
:
4
.reduce() is really powerful - but I think that you need a recursive call for this? I haven't thought about using .reduce() for this...
well basically it looks like this
[1,2,3,[[4]]] still
@daddycardona ah gawd you made me go back and look at mine
yes I know I have been trying to figure something else out because I was wondering how come it did not work originally telling me that
a.concat(b) is not a function and I am like yes it is, but i needed to add the }[]
and i left this little note for myself:
// this [recursivity [is [driving [me [nuts]]]]]
return newArr;
}
steamrollArray([1, [2], [3, [[4]]]]);},[]
@DarrenfJ lol
@DarrenfJ :smile:
i'm no kidding.. i don't even remember leaving myself that.. HA! and now i have to try to figure what i tried and why
thanks for that ;)
I am like what else do I need to do now that i have the array for the most part
[1,2,3,[[4]] how do i get taht sucker down again so I used another variable and just redid the reduce function again but nope that did not work lol
so I have the job half way done I am trying to see what is next because most of the calls are 3 dimensial arrays I have to fix. I guess somewhere in real life I might need this but then I will just add underscore to my page to make it easer by doing this
var na = _.flatten(arr) and it works like a charm
@daddycardona Maybe you could get some inspiration from underscore on how they build the flatten function? :) https://github.com/jashkenas/underscore/blob/master/underscore.js#L527
Oh I will thanks I was looking for that just now thanks @piteto
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Seems like you're going for a 1-2 liner, and their for loop implementation with multiple if/else's could spark some ideas
It would be cool to figure out how to get underscore loaded in the fcc exercises
var s = document.createElement('script');
s.src = "https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js";
document.body.appendChild(s);
maybe promisify that in your function
that didn't work lol
I tried that
yeah, but aren't they trying to cover (more-or-less) "vanilla" JS code in the JS sections? Loading a library of other JS functions defeats the purpose. Although it would make things easier - like loading a math package, etc... :)
I know I understand the concepts of some math but however I don't or can't seem to get them into the flow of codes
@daddycardona - someone else was having a discussion about that concept here (in one of the rooms) during the early morning hours. It's tricky - I used to work with someone and tried to spend time helping them with coding tasks and for some reason I never could break through a barrier that seemed to keep them from "getting it"... I know that I have my own roadblocks to understanding things, too. I've just been doing this for a long time (when employed) and sometimes I've gone back and looked at code that I wrote and said to myself "did I write this?" I think that there is "a zone" that you get into where things start to flow and you start to understand and think in ways that make the problems and solutions different. I don't know how to make that happen, though...
LOL @khaduch I feel you I was on a flow for like 4 challenges in a row then bam lol
stupid steam roller lol
@daddycardona - recursion is the key to this one, although you might possibly do it without recursion. I'm not going to look at my solution and just throw and idea together and pass it along... give me a few minutes.
okay
@daddycardona - okay, here is a code example that illustrates finding the arrays and processing them recursively. It does output stuff to console.log - put it in the environment of your choice, maybe like http://pythontutor.com/javascript.html and see what it does. Maybe I should say: SPOILER ALERT!!!
let count = 0;
function arrayFlatten(arr){
if (count++ > 200) {
console.log("looks like a loop");
return;
}
if (Array.isArray(arr)){
console.log(`Found an array: ${JSON.stringify(arr)}`);
for (let i=0; i < arr.length; i++){
arrayFlatten(arr[i]);
}
} else {
console.log(`Not an array: ${JSON.stringify(arr)}`);
return;
}
}
arrayFlatten([1,[2,3],4,5,[[6]]]);
I just put a loop catcher in there because I accidentally made a coding error initially. :)
it will print "found an array" if it finds an array as the input. And will walk though the array with a
for loop. If it doesn't find an array, it will just print the element.
I was just looking up stringify for just javascript not jquery because you would have to use javascript only lol
I was also looking up how to use a for loop like
varName.for()
@daddycardona - I only use it because you don't always see the structure properly if you just
console.log it... AND it's a javascript feature, at least it's documented on MDN...
I was thinking that I know the arr is going to always put it like in a array like
[1,etc.. but I just stringify it 1st would it not just be 1 2 3 4? when I document.write it it shows up like 1,2,3,4
I've just gotten to use it as a failsafe in
console.log outputs, since I never really figured out when I see the actual text format of the array / object, or it just outputs [Object object] sometimes... :)
LOL yes I seen that so many times lol
especially if you put like
console.log(arr+'bla')
@daddycardona - this is the output that I get for that example that I put in to call my function:
"Found an array: [1,[2,3],4,5,[[6]]]"
"Not an array: 1"
"Found an array: [2,3]"
"Not an array: 2"
"Not an array: 3"
"Not an array: 4"
"Not an array: 5"
"Found an array: [[6]]"
"Found an array: [6]"
"Not an array: 6"So when it says "Found an array", then it calls the function again, by assuming that you have an array to loop through. When it says "Not an array", that is something that was "flattened".
I originally used is array in a for loop,
for(; ; ){
if(Array.isArray(arr[i])){
newArr.push(arr[i]);
}
}
I think I need a new approach lol or new for loop
@DarrenfJ okay dam I need to do something like that then when it is not an array you can .push that sucker to an array I like that thinking
well, you only want to loop on something when it is an array. If the argument that you receive is not an array, then you just have a value that you need to push on your result array....
Yeah I need to learn how to do that properly lol
thanks @DarrenfJ and @khaduch
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I really need to understand that
@daddycardona - take that code and go to http://pythontutor.com/javascript.html and walk through it - maybe it will be helpful? I don't exactly know what it will show you as far as the recursion? Maybe I'll go and try it myself?
@khaduch - well, pythontutor wouldn't run it - maybe it doesn't like recursive calls? Or maybe just a glitch... LOL...
LMAO
ok I am back like after 7 months
where did the help button on freecodecamp?
@Rabbani007 - each exercise has a "Help" button now, I think? It brings you here... if that's what you're asking? WAIT - i might be wrong. They were (or are) trying to shift help requests to the forum and not here to the chat? I haven't visited the forum to see what is going on with that. It has definitely changed the usage model for these chat rooms.
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check what out
this chat rooms were the best for helps
now it really sucks
Guys I need help with the "make the app able to edit the recipes" user story.
I'm trying to pop up a Modal after pressing the EDIT button inside the recipe, but I can't figure where I should RENDER the modal in the first place and how to pass him all the props in a good way without repeating code and other bad habits, really confused on how to pop this modal, how to pass it the information (recipe title, ingridients) and how to change the state given the new parametrs, so resuming, the whole editing user story isn't coming my way, can you help me to solve this matter?
here is the project: https://codepen.io/artbohr/pen/GvXxwY
I'm trying to pop up a Modal after pressing the EDIT button inside the recipe, but I can't figure where I should RENDER the modal in the first place and how to pass him all the props in a good way without repeating code and other bad habits, really confused on how to pop this modal, how to pass it the information (recipe title, ingridients) and how to change the state given the new parametrs, so resuming, the whole editing user story isn't coming my way, can you help me to solve this matter?
here is the project: https://codepen.io/artbohr/pen/GvXxwY
I would put the edit button on each desert
or like where it says apple pie on that line it should populate to the right of each recipe
@Rabbani007 - well, there are still a few regular visitors here that help out a lot - it has gotten a lot quieter than it used to be. The forum seems like kind of a good idea - they mention that it is "like a stackoverflow site for campers" - so repetitive questions might be a thing of the past when it catches on....
@daddycardona I'm asking a technical "react " related question not a design question
oh okay @artbohr not there yet
these help rooms were the best....I could get instant help and there was a window linked with this room.....now i have to go to the FORUM. that really upsets me..
@GitHub-Henry I just loaded it to my vscode as well I don't know how it is doing that lol
i think Quincy sent a note pushing folks to forums
the guy knows his JS
is that you @GitHub-Henry
@Rabbani007 - just save a bookmark to the chat rooms - people have been using it, maybe just "tree huggers" like me... :) They do have a link to the chat rooms, but from the freeCodeCamp "dashboard" for your account, you have to follow the "Update My Settings" link at the top... kind of a non sequitur.... "Chat with other campers in real time" is the button there.
no, that guy is from Europe, his name escapes me for the moment.
@artbohr I know that modals in react are a bone of contention - React 16 has added something called fragments to alleviate this issue.
This blog post talks about modals, and is not too old (just last Dec.)
This blog post talks about modals, and is not too old (just last Dec.)
@daddycardona I do recommend spending some time watching his channel, cuz he does a covers many JS topics , but he's not for beginners.
dammit lol I will watch him he is atleast funny lol @GitHub-Henry
@daddycardona yeah, kinda hard to make programming topics entertaining and educational, he tries to do both
yes I know reminds me of bucky just wild lol :)
he is from the The New Boston
Bucky has a large number of videos, amazing
yes he was the one I went to for everything
@GitHub-Henry do i have to have node.js in my computer to use this?
quoka.js
@daddycardona yes
I guess I have to install it boo lol
@daddycardona once you start using node.js it's uses keeps growing, cuz there's so much you can do with it
I have not used it yet lol
well I got it working thank God I hate having to console.log everything from vscode
@GitHub-Henry since you are new to NPM. you might want to read this. in short, he suggest avoid global installs. he lists reasons. take away suggestion use '--save-dev' instead of using '-g'.
I don't know what i did I just installed it lol
@sjames1958gm hey, what post? Didn't get the link, thank you for referring to this new method.
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@daddycardona npm can seem overwhelming at first, when you find yourself looking for solutions you'll see some that use node.js and you can check it out and see if it works for you. it's amazing how much is done using node.js
@GitHub-Henry How do you save your js file that is using the quoka.js
what extension
js
Okay it keeps going straight to babel when I opt to save it
@daddycardona mine just saved as js
@sjames1958gm had a short google search and didn't find anything of use :( (modals/fragments wise) also still not clear how to implement all this information handling to make it edittable
Okay I don't know why I don't even see the extension javascript lol
okay so it basically saves as a js file but once you save it , it won't open up as a quoka.js file lol
@daddycardona when you reopen you need to CTRL + K Q to restart Quokka
in vs code in windows environment
function firstRepeatingLetter(str){
for(var i = 0; i<str.length; i++){
var remaining = str.slice(i+1);
if(remaining.indexOf(str[i]) !== -1) {
return str[i];
}
}
return str;
}
firstRepeatingLetter("Repetition") // => "e"
okay that is what it is I don't need to keep making a new one lol
can someone explain to me why we’re using ‘str.slice(i+1)’?
noob question here, lol
I wouldn't use it at all
I would do
str += str
hmm, it would return ‘R'
oh no I am sorry it would retjrn thewhole word
what you trying to return R a bunch of times I don't understand what you trying to do?
I don’t understand how the .slicei+1 works though
me either lol
Write a function firstRepeatingLetter that finds the first repeating letter in a string (i.e. the character which occurs more than once in a given string). The return value of your function should be a string consisting of only single character which is the first repeated character in the string.
@leonaaa @daddycardona https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/slice
trying to find the first repeating letter in the test case, which is e. it is the first letter that appears two times in the word, repetition
i understand how the slice method works, but i’m not sure how it works with ‘+1'
@leonaaa just add one index further
adds*
I would of done that differently so I am the worse to ask I am in the same boat you are lol
@artbohr do you know why it’s necessary in the problem to do that?
@daddycardona lol haha it’s okay. we’re both learning here i guess
@artbohr if i did i+2 or i+3, it still returns ‘e’, which is the correct answer to the test case
@leonna maybe it can be because the first character can be repeating itself
can't
actually, if i did i+3.. it returns the entire word
@leonna you need to use console.log(); to understand what's going on or use python tutor
@leonna
function firstRepeatingLetter(str){
for(var i = 0; i<str.length; i++){
var remaining = str.slice(i+3);
console.log(remaining);
if(remaining.indexOf(str[i]) !== -1) {
return str[i];
}
}
return str;
}
firstRepeatingLetter("Repetition") // => "e"
@leonna i+3 outputs this
etition
tition
ition
tion
ion
on
n
=> 'Repetition'
oooh
@leonna gotta go, could help more later, after I'm back, if it's still needed, sry
no thanks! that explains
no, thanks**
@leonna if you want to give coockies you need to add "@artbohr" to reference to me, you don't have to, just explaining how coockies works in here
what’s that?
ohhh the @artbohr
haha thanks :) @artbohr
leonaaa sends brownie points to @artbohr :sparkles: :thumbsup: :sparkles:
:cookie: 311 | @artbohr |http://www.freecodecamp.com/artbohr
@leonna ye, it's whats used here xD gl, afk
@artbohr you definitely spelled my username wrong but that’s okay LOL
@artbohr i’ll give ya a break, you helped me out here haha
@leonaaa sry, the hurry took over :D
@leonaaa so you solved the mystery or still need some help?
i’m good! @artbohr it made sense after the console.log
Thanks again @artbohr
leonaaa sends brownie points to @artbohr :sparkles: :thumbsup: :sparkles:
api offline
@leonaaa sure, glad it helped, keep using that console.log, it makes all the difference to understand what's going on
Hey, can someone explain to me why in the symmetric return algorithm (https://www.freecodecamp.org/challenges/symmetric-difference), in the second test case, the correct return includes 5? 5 is in all the arrays provided, so why is it part of the symmetric difference?
perhaps I'm missunderstanding the definition of symmetric difference? Isn't it just any values which appear in one case, but no more than one?
@Hijerboa This video explains it pretty well - only a 5minute video: https://www.youtube.com/watch?v=PxffSUQRkG4
@piteto oohhhhhh so if there are three arrays, and the value appears in three or more, then its ok?
Yes, exactly @Hijerboa
that makes so much more sense. @piteto thank you!
hijerboa sends brownie points to @piteto :sparkles: :thumbsup: :sparkles:
:cookie: 213 | @piteto |http://www.freecodecamp.com/piteto
Now, if we could figure out when to use it in real life :p
@piteto maybe when one goes to get a job and they ask you to do it, but then never ask you to do anything like it again?