get help in general - we have more specialized help rooms here: https://gitter.im/FreeCodeCamp/home
Hello guys, I got stuck. Any idea why it's not working?
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/es6/import-a-default-export
"use strict";
import add from "./math_functions";
subtract(7,4);
you're importing
add not subtract
In the following code, please import the default export, subtract, from the file "math_functions", found in the same directory as this file.
@thekholm80 oh god! haha thank you!!!!!
:+1:
@thekholm80 Quick question. I just finish the ES6 section, but I don't think I got all the knowledge down. Should I go back and go through it again or keep going?
it won't hurt to go through it again, but if you're anything like me the best way to retain it is to use it in projects
Makes total sense. Thank you!
Makes total sense. Thank you! @thekholm80
you might check out something like codewars or codefights, get some practice writing algos
lots of fun, too
@devbysalas It's pretty normal not to remember everything by head. The imporant part is that you have a general idea. Like if someone requests you to make something, you have a general idea on how to realise it. Having to Google around a bit to actually turn it into functional code is perfectly acceptable. Like if someone asks me to create a chatsystem, I know I'm gonna need a websocket, a database, etc etc. But don't believe for a second that I can just take a blank piece of paper and code it all down. And I've got 16+ years of experience in coding ;-)
i could
get on my level, bob
You wish :laughing:
:stuck_out_tongue:
xD
Thank you guys! @thekholm80 @bjorno43
@devbysalas You're welcome
Anyone else still around btw?
Me
Ah cool :)
Doing anything interesting?
Yes actually!
Awesome, what are you doing?
Putting together a guide for newbies on where to start depending on what they want to do. I’m putting a team together to work on it. I know there are a few maps out there but when I was new, nothing was explained in “noob” language.
Nice :)
@bjorno43 @DavidJamesAustin :wave:
@Marmiz :wave:
Hey!
I'm building my own codepen project, ghehe
What are you making?
I just said that :laughing: Something simular to codepen
Still in Alpha though. It works, but far from finished
Oh similar I didn’t realize that haha.
Want me to play around and let you know if I find anything?
Nah. You can play around with it to test it out if you want, but I already know the current issues :smile:
You know what happens if you do something and then click New? haha
Ye it empties all the codefields
Yeah, but not the results area.
Strange, it does for me
I’m using Safari.
Right.. And safari is a bitch when it comes to events, lol
Ah. If you click “run” with something in there, and then hit new it glitches out. That is what I did.
That is very strange.. Run basicly checks for syntax errors and displays them if there are any. It completely disables interaction with the website, so clicking on New should not be possible while errors are displayed. If there are no errors, using Run is pretty much pointless as Change events on the code fields already perform a Run event
Yeah, odd..
Hmm, Chrome and Firefox were fine, but IE detected an error. Fixed that and uploaded it. See if that helped? @DavidJamesAustin
@bjorno43 , help needed
I can try again.
@coderkarma Woof! :laughing: What can I do for you?
very simple problem but i am running out of idea to do this
let's say there array is given like let array = [ 5, 4,3,2,1];
have to reverse that array but with some conditions 1. have to return same array, 2. no built in function like .reverse
Wait.. How can you possibly reverse an array but return the same? Or do you mean the same array, just reversed?
yes
have to be same array just reversed . we can't create new array and push it.
I Did but my test didn't pass
Now it’s only happening if I click run with say invalid CSS and then try to create something new @bjorno43
what is the problem @DavidJamesAustin
Should be rather easy:
let arr = [5,4,3,2,1];
function reverse(arr){
let temp = [];
for(let i = 0; i < arr.length; i++){
temp.splice(0, 0, arr[i]);
}
arr = temp;
return arr;
}
console.log(reverse(arr)); // [1,2,3,4,5]
Basicly all you do is take the value from the array and push it in the first position of the temp array @coderkarma
oh you used splice for this .
@coderkarma nothing to do with fcc haha, it’s his own codepen sort of thing.
@DavidJamesAustin Ahhh, I found the issue thanks to that
:smile:
The code is made not to run when there are syntax errors. Mostly to prevent ppl from getting a bunch of console errors when typing JS. So when there's a syntax error, the event never gets fired when you click new, ghehe
Gotcha
@DavidJamesAustin I think it's fixed now
Awesome, I’ll look.
@bjorno43 thank you man.
@coderkarma No problem :)
I never thought i could use splice in that occasion
so dumb feeling
I just basically struggle with algorithms @bjorno43
I have long way to go.
Don't worrie too much about it. It takes time and experience to get used to it
My thought process is like: Alright. I need to reverse an array without using a build in function for it. So basicly I need to create a new array where I push each value in front of the last value instead of behind it. A bit of a reversed array push. What allowes me to do that? Ah.
splice() allowes me to set the position of where I want to push something into an array. The rest is easy :) @coderkarma
You could also have used
pop() for it. That removes the last value of an array and returns it. In that case all you had to do was use that value and push it into the temp array.
Anyway, gotta go guys. Cya around! :wave:
Bye!
hey everyone
hey
I’m having an issue with the FCC curriculum page, not sure if anyone else is experiencing it or if it’s expected behaviour
i’ve completed everything in the Responsive Web Design Certification, including all the projects
Whenever i refresh the page, i would expect it to bring me to the module that I’m up to
yet it always expands the Basic HTML and HTML5 section
which i’ve already completed as you can see
I’m currently up to the JavaScript ES6 section
@bjorno43 thanks man.
does this happen to anyone else or just me?
@skillt3ch It does that for everyone. The page is actually loaded before it fetches what you've completed. After that it fills it in
ahh i see, i remember when i first signed up over a year ago, it would always take me to my current progress
instead of expanding the HTML section
It still does. Just not on the curriculum list. Just visit https://www.freecodecamp.org and click the big ass green button at the buttom that says "Go to the coding curriculum". It will take you to the last challenge you were at
ohhh i see
@bjorno43 thank you
@skillt3ch You're welcome :)
Anyway, rly off to bed now. Gn8!
I actually was so close to completing my front end cert a long time ago, and was up to the “Simon Game” (last project) and then i came back to finish the project and noticed FCC had changed quite a lot
ok, take care
@ @bjorno43 don't sleep tonight man.
lol
just kidding, goodnight man.
@coderkarma If only life allowed me such luxuries, ghehe
Gn8!@
anyone having issues claiming their “Responsive Web Design” certification?
I’ve completed all the projects, yet i get the error
it looks like you have not completed the necessary steps. Please complete the required challenges to claim the Responsive Web Design
I can’t see anything I’ve missed, and all my projects are passing tests
I haven't completed three of them so no idea sorry.
@coderkarma no problem
@skillt3ch I made a post on the forums linking to something else that explains what is happen and how it’s being fixed. Want a link?
@DavidJamesAustin yes please
Hello guys
How can I get the size of a collection using Mongoose?
Can anyone explain to me how .apply() works?
i think you’re up to the same challenge as i am :laughing:
Really, which one?
i could be wrong, but i just thought it was funny that you just literally asked what I was thinking
Oh, I'm not in that challenge
yeah it was a long shot
I'm in Steamroller one.
ahh i see
And to be honest, I don't bother with ES6 in freecodecamp.
why’s that?
It's pretty much a mess. I rather learn it from other resources.
Most people complains about how it is mess, as you move forward, you will see that there are a lot of stuff are not explained well.
Heck, there are not even promises lessons and it's like the most important thing.
interesting, i’ve heard of “promises” but haven’t read anything about them
i’m just a completionist, liking to do all the challenges in chronological order
Well, I don't know promises but I see a lot of people talk about it and it seems a very important thing. I wonder why they didn't explain it in ES6 section.
i was reading up about the .apply() method
it seems to be similar to the .call() method, except it takes the arguments as an array
Yes but what they do?
What is their job?
I don't understand that.
Really, which one?
basically my understanding is that It can be used to call a method with an owner object as an argument.
i.e. an object can use a method belonging to another object.
var person = {
fullName: function() {
return this.firstName + " " + this.lastName;
}
}
var person1 = {
firstName:"John",
lastName: "Doe",
}
var person2 = {
firstName:"Mary",
lastName: "Doe",
}
person.fullName.call(person1); // Will return "John Doe”
So you're saying that call transforms "this" to the current object?
yes, the object that you pass as an argument
e.g. “person1” in that example above
Yes but if that is the case then why we could use it to flatten an array?
The difference between call() and apply()
The call() method takes arguments separately.
The apply() method takes arguments as an array.
in which case are we using it to flatten an array?
can you provide an example?
oh you mean for example:
var arr = [6, 89, 3, 45];
var maximus = Math.max.apply(null, arr); // returns 89
it’s because Math.max expects separate arguments, not an array, so you cannot run Math.max directly on an array
I don't want to search for a way to flatten an array by using .apply() that way I will spoiler myself but I know that there are a way. Anyway, thanks for the explaination! It was really helpful
@OGTechnoBoy you’re welcome
What is up guys ?
Do u know if I can use the same text in documentation page ?
Well, there are clouds up there.
And the sky too.
does any one here familiar to materialize css
Does mongoose support mongodb update operators?
Guys do u know if I can find a job or earning online on my basic skills of programming( like the ones that are required to get first certificate)
?
@Geek-Killer Yes you can, but no one here will no the answer for you. Just go out and try, life is about having the will to get what you want :)
@cadare Thanks, but I just need some suggestions on it, I need money urgently. I have tried to find a work physically, still waiting for the response. And now I will try to find an online job, I will be happy if someone will advice me any websites.
Just google and Good luck. You will get there :)
@cadare Okay, Thanks Khadar. I will)
I am now a certified idiot, every1 :stuck_out_tongue_closed_eyes:
Welcome to the club 🎉
I wanna be in a club
Greetings!
Can I ask someone a question about finished projects? It's been a while since I last submitted a project for FCC and I want to make sure I am doing it right...
hmmm.. I think I am speaking in a vacuum...
@JeffGreenlee42 whats up
I'm sure this has been asked before: Is it OK to use Github instead of Codepen?
you can build your projects wherever you want, you just have to have a live version available, and have the code somewhere public
Ok.. I feel fenced in when using Codepen.. I like using my own editor... just wanted to make sure.
Hello, can someone advise me on some routing? I am building an app that send some data async to the server to store it in a database. I want also to request some data async from the database to the webpage, without refreshing the page. So I am wondering, I used a POST request with the same route as the webpage for putting the data to the database. But to get the data from the database, I would just need to invent a new url? What is the best practices in that case?
i'd define a new route for GET request
you can make an api request to that route without refreshing your page
@thekholm80 thanks, do you think the POST request sending data to the database should be also this new route then?
personally i like to define routes for a single purpose
@thekholm80 Ok get it. res.send(JSON.stringify({key: value})); would not refresh the page, would it?
you can send json directly with
res.json({key:value})
saves a step of stringifying / parsing
@thekholm80 Thanks. Awesome!
Hey guys! How can I set more than a data type for a document with mongoose?
@mehdiamlal can you provide an example of what you mean
@ezioda004 how's your cs50 adventure going?
@kbaig I have a field inside a mongodb document, and I don't want that field to have a fixed type (string, num, boolean...). Is there a way I can do that?
Anyone here gifted in JS Regex?
@brisourceful i use https://regex101.com/ whenever i have to write regex
otherwise i'm useless
I've been using it
I still can't figure it out
I'm trying to write a regex to capture all characters before a ? but no characters after the ?
I just use regexr
i'm sure js has look-aheads
no just lookbehinds
lame
only negatives
could just split it at the
? if nothing else seems a good idea
Oh good point.
Worst case scenario
I was really hoping there was a way to do it with Regex
/[^\?]*/i? match 0 or more but not ??
No, I just want all characters before the
?
That regex creates two matches
@brisourceful
"www.somewebsite.com/?prefn1".match(/(^.+)\?/)[1] // "www.somewebsite.com/"
I believe that works but what is the
[1] for?
The first item in the array is the match
the second is the captured group
you want the captured group
correct
which is the second item in the array
hence [1]
got it! Makes sense now
It looks like that works! Thanks so much!
You're welcome :smile:
ha mine did work
For some reason when I popped that into Regex101, the
i flag threw it off.
Hey guys! I've just finished a course on mongodb/mongoose. I'd like to practice my new skills, could you suggest any idea for an app/api using databases?
because the i is already there
err .. i mean you have to add it through their flags thingy
ahh I see
I have mine default to global flag
that's why
@thekholm80 @brisourceful I'd go with kyle's
Thanks @thekholm80 and @kbaig
@brisourceful how's the PNW? have you taken over Microsoft yet?
hahah LOL
nope
last i heard you were freelancing?
or maybe my memory is garbage
nope, I've been contracting for the same company for nearly a year now
contract, not freelance
why they haven't converted me to FTE is beyond me
this way you get all that awesome overtime?
except I never get to work overtime
lame
because they don't want to foot the bill
cheap bastards
except they aren't!!! lol they are paying the consulting company I'm contracted through an absurd amount of money
@thekholm80 how's it going
@brisourceful just not money that all goes to you?
@brisourceful and they'll have to pay them way more for OT
@kbaig pretty good, did you get moved over the pond yet?
If a consultant is making $30/hour, the company is prob billing $100
Exactly!!
They are getting ripped off
Nah that's fine imo
it would be cheaper for the company to pay the fee to convert me to FTE than to keep paying the consulting company
what's the saying? step over a dollar to pick up a dime?
The company is getting compensated for training you, maintaining quality of your delivery, and being liable for you
or penny-wise, pound poor in jolly ol' england
Now whether yours is doing all that is a diff story :smile:
uhhh no not at all
@thekholm80 I'm high key considering getting married in the next few weeks and staying
Which would mean being unemployed for 4-6 months :worried:
@kbaig do it! just remember you can't work on a marriage visa so get your greencard app in asap
what kind of toaster do you want for a gift?
@thekholm80 pfft I don't like toast
@thekholm80 yeah we'd get the app in same week
I'm gonna have to think about what I actually want to do with my career since I've been bound to jobs that sponsor before
Why not just get a H1-B?
@brisourceful Didn't get it. Tried
Ah bummer
i've been trying to make sense of our visa/immigration/etc laws and it makes my head hurt
there is no sense to it @thekholm80
with you, Ravi and Manish all in the same boat i was hoping to be helpful in some way
heh
but i'm not smart enough to figure it out
Manish is on an H1 already no?
nope, still in school
ahh
i think he graduates in July
I won't be competing with his company soon if I go through with this ;)
so his clock will start ticking soon
Presumably he is getting a stem degree so he will have plenty of time to figure it out. I just had a year
i thought Ravi said he had something like 90 days after graduation to get a work visa or go home
No it's that once he receives his work permit, he has 90 days of unemployment available
manish will have his masters, so he should qualify for over-cap h1b
He must have received his permit before graduating and also not have gotten an offer yet
This year it was 38% for non-masters and 58% for masters
Gotta run! thanks you two for helping me out!
Chance of success in the lottery
@brisourceful cya
@brisourceful :wave: good seeing you again
same to you!
:wave:
@anthonygallina1 :wave:
@thekholm80 Hi :smile:
:wave:
@bjorno43 hi bob
@thekholm80 Yo m8
Whats the topic?
Codechallenge: Re create codepen and improve it
:laughing:
Na I wouldnt do that to Chris.
lol
Hey we could call it a clone!
repl.it has guided lessons
https://icecub.nl/ide/ :stuck_out_tongue:
I just wish I could fix these I worked hard on them https://codepen.io/anthonygallina/pen/evQjWQ
looks pretty
YA Legacy and the backend killed Man legacy sounds too close to monolithic
the markdown preview seems to be working fine
I some how lost 6000 cookies too
@thekholm80 Thank you
i like the animation on the menu in your camper news
@thekholm80 oh it used to look wonder full had storys and usefull links
Wasnt easy at the time getting the alignment right
css is for masochists
yup lots of time down the tiolet there
@thekholm80 It gets easier
oh i know, i used to be fairly decent with css. it's just not worth the effort for me anymore
I really wish I knew how to make a backend for those though. So it wouldnt be a complete wash.
Like a solution.
I meen even if it was old data. It still would demo
Hey guys i am at a complete loss on how to solve this exerciser below.
Basic JavaScript: Use the parseInt Function: "Use parseInt() in the convertToInteger function so it converts the input string str into an integer, and returns it."
@kdleonard93 what did you try? can we see your code?
I've read through Mozilla and W3schools and i just don't understand the initial setup for the question.
function convertToInteger(str) {
}
convertToInteger("56");
^^the original question
so you have 2 steps here:
- convert string to integer
- return integer
if you look at the lesson instructions:
The parseInt() function parses a string and returns an integer. Here's an example:
var a = parseInt("007");
in your code, the string is provided as an argument to the function,
str
Suppose I have an entry in my database, which is modified by some other system (or by database itself using job or so), now i want to send a notification to my web page that it is changed, What is the best way to handle this scenario? I donot want to poll the database.
which db?
@thekholm80 not sure which, any rdbms
@thekholm80 This is kind of hypothetical scenario
function convertToInteger(str) {
var a = parseInt("100", 10);
}
convertToInteger("56");
return (56);
@thekholm80 That's the only thing i can think of, I've looked through multiple forums to try and find a solution( or one that i can understand) but i haven't had any luck
with mongodb you can use a combination of capped collections and tailable cursors to make kind of event listeners
After clients insert new additional documents into a capped collection, the tailable cursor will continue to retrieve documents.
i don't think this will work for modified db info, but it will alert to new insertions
@kdleonard93 where are you getting
"100" from?
parseInt(stringToBeParsed) in this case, the string is stored in the str variable
Im not completely sure. I thought you needed to test certain strings that were numbers inside them.
but 1 sec.....
nah, they want you to make a reusable function that will take a string (in this case,
str) and spit out an integer
@thekholm80 oh so this would depend on underlying db? Was looking for some kind of pattern or something
function convertToInteger(str) {
// do magic to turn the string into an integer using parseInt()
// return the integer
}
convertToInteger("56");
@simpleguy747 i think so, unless you want an external resource monitoring your db for changes
@kdleonard93 you only need to add the 2 lines i have commented there
@thekholm80 hmm... was thinking more like queues monitoring and use pub-sub along with it then consume from the queue and display it using websocket, don't know though if this would work or not
maybe? you'd have to do some research
the difficult part for me is that you said the db could change itself, or the changes could come from other sources. i don't know if i'm smart enough to think of a way to track all of that without polling the db
///
function convertToInteger(str) {
var str = parseInt();
return (str);
}
convertToInteger("56");
///
@kdleonard93 almost there, but
str is already defined in the function definition function convertToInteger(str)
so you'll need to name your variable something else
also, you need to provide that
str to parseInt()
function printManyTimes(str) {
"use strict";
// change code below this line
const sentence = str + " is cool!";
for(let i = 0; i < str.length; i+=2) {
console.log(sentence);
}
// change code above this line
}
printManyTimes("freeCodeCamp");
//this is the result of the test... why?
// running test
SENTENCE should be a constant variable declared with const.
Unexpected token '?'
// tests completed
SENTENCE should be a constant variable declared with const.
Unexpected token '?'
// tests completed
@AlbertoGiambone
SENTENCE isn't the same as sentence, the instructions ask you to use all-caps
also, the last test is bugged and will not pass until the devs fix it
ahh ok
@thekholm80 perfect that worked!! Thanks man!
P.S. how do you add code correctly on here
@thekholm80 thank's
@kdleonard93 good job
```
code
```
using backticks (usually found to the left of the 1 key)
```
code
```
using backticks (usually found to the left of the 1 key)
use shift + enter to jump to a new line
@thekholm80 whit the all-caps, return this
// running test
Unexpected token '?'
// tests completed
// running test
Unexpected token '?'
// tests completed
@AlbertoGiambone right, that test is broken right now
your code is most-likely correct, but until they fix the test it will not pass
\\
function convertToInteger(str) {
var a = parseInt(str);
return a;
}
convertToInteger("56");
\\
\\
function convertToInteger(str) {
var a = parseInt(str);
return a;
}
convertToInteger("56");
\\
`
not \
ahh haha
`
function convertToInteger(str) {
var a = parseInt(str);
return a;
}
convertToInteger("56");
`
3 of them
```
Jesus christ ha
```
```
lol
function convertToInteger(str) {
var a = parseInt(str);
return a;
}
convertToInteger("56");
:tada:
Success!
@kdleonard93 now to learn the joys of direct return so you can skip a step
function convertToInteger(str) {
return parseInt(str);
}
then when you learn es6 you can shorten it to
const convertToInteger = str => parseInt(str);
Yea that's much cleaner haha. Appreciate the advice man!
@cmccormack alright thank you for your advice because I'm new to all this .
hi, one of the tests for "finders keepers" is
findElement([1, 3, 5, 8, 9, 10], function(num) { return num % 2 === 0; }) should return 8.
but also 10 % 2 === 0 right?
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-algorithm-scripting/finders-keepers/
findElement([1, 3, 5, 8, 9, 10], function(num) { return num % 2 === 0; }) should return 8.
but also 10 % 2 === 0 right?
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-algorithm-scripting/finders-keepers/
sorry it should only return the first element that passes the test
@mosaic-greg it says return the first element that matches the test
you got it
thanks