The Big Programming Thread - Page 707

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Thread Rules
1. This is not a "do my homework for me" thread. If you have specific questions, ask, but don't post an assignment or homework problem and expect an exact solution.
2. No recruiting for your cockamamie projects (you won't replace facebook with 3 dudes you found on the internet and $20)
3. If you can't articulate why a language is bad, don't start slinging shit about it. Just remember that nothing is worse than making CSS IE6 compatible.
4. Use [code] tags to format code blocks.

Manit0u

Poland17875 Posts

March 02 2016 02:15 GMT

#14121

On March 02 2016 10:59 Blisse wrote:
What's the module pattern?

http://www.adequatelygood.com/JavaScript-Module-Pattern-In-Depth.html

killa_robot

Canada1884 Posts

March 02 2016 03:58 GMT

#14122

On March 01 2016 12:05 tofucake wrote:
I've actually found that there's more jobs than developers...

Based on what? Unless you're talking about a tech hub I find that really hard to believe.

Thaniri

1264 Posts

March 02 2016 06:19 GMT

#14123

On March 01 2016 11:47 Manit0u wrote:
Task 1:
Create a single HTML page, no JS, no Bootstrap, just pure HTML and CSS (can be LESS or SASS). But, you have to create some specific elements for it:
a) header
b) left section (1/3rd width)
c) right section (2/3rds width)
d) footer

Now, your job is to make sure that the footer is always on the bottom. It can never go above the bottom side of your screen (it can go below). Left and right sections must be of the same height, regardless of the amount of content you put in each of them (tip: give each element a different background color so you can see them better). Layout can't break if you resize your window (it can scale, but elements can't overlap or disappear suddenly).

This is much harder than you think.

Is that really enough for a job? I can do that in minutes.

Based on everything I've ever heard about developer jobs you need to know how to jump through a million hoops just to pass the interview, lots of data structures and algorithm questions. But again, I have no experience so who am I to know personally.

I'm going to be applying to internships in 3-6 months and I didn't think it was worth applying until I did a slightly higher level data structures course.

In any event, I'm wondering what level you'd describe these algorithm challenges to be at: http://www.freecodecamp.com/thaniri Just look at the algorithms section, I'm about halfway through their "intermediate" section.
I know a lot of my solutions are bad but I'm just trying to complete a lot of challenges. Once I'm done with these I think I'll move to project euler.

edit: Additional question. I'll probably need to make a portfolio soon. Is using plain javascript for everything (see weather app) acceptable or should I use jquery/other frameworks. Im assuming I need to start learning SASS. Bootstrap is easy enough.

Ropid

Germany3557 Posts

March 02 2016 07:49 GMT

#14124

What's perhaps strange about those interviews is that you actually never do algorithms and data structures yourself when it's for work. You only ever do it if you have a special reason. You want a good reason when you decide to not re-use existing stuff that's proven to be correct because there's a chance to make mistakes doing it yourself.

That's even for the most basic stuff, like, the language might have the C style "for (a;b;c)" loops, and it might have something like "foreach (list)", then you wouldn't want to use the "for (a;b;c)" whenever the "foreach" works.

Or a different version of that loop example, let's say you are in a functional language that has no loop and instead uses recursion for everything. You always do "map", "reduce", etc. wherever those apply and try to not have recursion done manually.

Thaniri

1264 Posts

March 02 2016 08:07 GMT

#14125

I'm spending my spare time playing with javascript and I have a hard time knowing how to use those built-in features. An example comes to mind where I had to check the truth of an input and it could be undefined, blank, 0, "no", NaN... etc. Javascript has a way to account for all false possibilities but I made a big if-else statement for every possibility to return false. Built-in features like that might as well be witchcraft to me.

edit: I still don't understand it.

Nesserev

Belgium2760 Posts

March 02 2016 09:06 GMT

#14126

--- Nuked ---

Manit0u

Poland17875 Posts

March 02 2016 11:20 GMT

#14127

Actually, checking for truthiness/falsiness of an empty string is problematic in more than JavaScript (PHP also treats empty strings as falsy):

http://www.rosettacode.org/wiki/Empty_string

Although, generally, the best approach here is to check the actual string length.

Also tricky in JS, checking if something is actually a number (numeric string, when checking for stuff returned by jQuery val() etc.)...


function isNumeric(value) {
    return (!isNaN(value) && isFinite(value));
}

On March 02 2016 17:07 Thaniri wrote:
I'm spending my spare time playing with javascript and I have a hard time knowing how to use those built-in features. An example comes to mind where I had to check the truth of an input and it could be undefined, blank, 0, "no", NaN... etc. Javascript has a way to account for all false possibilities but I made a big if-else statement for every possibility to return false. Built-in features like that might as well be witchcraft to me.

edit: I still don't understand it.


function filterFalsy(value) {  
    if (!value) {
        return false;
    }
    
    if (typeof value !== 'string' && isNaN(value)) {
        return false;
    }
    
    if (null === value) {
        return false;
    }
    
    if (typeof value === 'string' && value.length === 0) {
        return false;
    }
    
    if (typeof value === 'undefined') {
        return false;
    }
    
    if (typeof value === 'string' && (value === 'no' || value === 'false' || value === '0')) {
        return false;
    }
    
    if (typeof value === 'number' && (isNaN(value) || !isFinite(value))) {
        return false;
    }
        
    return true;
}


var arr = [
  1,
  'abc',
  undefined,
  false,
  true,
  'no',
  'false',
  '0',
  0,
  '1234',
  null,
  Infinity,
  NaN,
];

var filtered = arr.filter(filterFalsy);

Filtered is:


Array [ 1, "abc", true, "1234" ]

Now, if you want it simpler you can simply remove all the ifs except the first one in the filter function. Then it'll return:


Array [ 1, "abc", true, "no", "false", "0", "1234", Infinity ]

This second option is actually all you need to do this exercise.

Edit:
If you don't understand how that works, here's a pretty simple explanation for the filter function.

.filter(callback) - what it does is walk the entire array and perform callback function on each element. If the callback returns false it discards the element from the array, otherwise it leaves it as is.

You can see how it works exactly over at MDN. It's your prime resource for learning how stuff in JS works.

MDN 4 lyfe! https://developer.mozilla.org/en-US/docs/Web

tofucake

Hyrule19270 Posts

March 02 2016 13:49 GMT

#14128

On March 02 2016 12:58 killa_robot wrote:

Show nested quote +

Based on what? Unless you're talking about a tech hub I find that really hard to believe.

I live in Philadelphia so I guess I'm a little spoiled there...

Thaniri

1264 Posts

March 02 2016 17:51 GMT

#14129

Thanks for those explanations guys.

amazingxkcd

GRAND OLD AMERICA16375 Posts

March 03 2016 03:29 GMT

#14130

question:

whats the most friendly front-end javascript framework when it comes to working with SVG animations (plugins, native support, etc). I have no real preference regarding the frameworks and would be willing to learn new ones for this project

amazingxkcd

GRAND OLD AMERICA16375 Posts

March 03 2016 05:58 GMT

#14131

On March 03 2016 12:29 amazingxkcd wrote:
question:

whats the most friendly front-end javascript framework when it comes to working with SVG animations (plugins, native support, etc). I have no real preference regarding the frameworks and would be willing to learn new ones for this project

decided to mess with ember js as they have HTML bars that will at least support SVG tags

tofucake

Hyrule19270 Posts

March 05 2016 01:15 GMT

#14132

assetic is being a dick

In Atom:
[image loading]

In Chromium
[image loading]

For whatever reason, it exports all text not written in Windows as null characters...which is baffling.

Manit0u

Poland17875 Posts

March 05 2016 04:32 GMT

#14133

What do you mean by "text not written in Windows"? I've never had problems with assetic on either Linux or Windows.

Here are some things that might help you:
http://stackoverflow.com/questions/19219578/nginx-and-css-issue

Also: Why Chromium? T_T

NovemberstOrm

Canada16217 Posts

March 05 2016 07:14 GMT

#14134

I'm creating an application in VB.net, I need to have a next record/prev record button, I'm using hashtables atm, any ideas?

tofucake

Hyrule19270 Posts

March 05 2016 11:54 GMT

#14135

On March 05 2016 13:32 Manit0u wrote:
What do you mean by "text not written in Windows"? I've never had problems with assetic on either Linux or Windows.

Here are some things that might help you:
http://stackoverflow.com/questions/19219578/nginx-and-css-issue

Also: Why Chromium? T_T

.align-go {
    transform: translateY(75%);
    -webkit-transform: translateY(75%);
}

^ was written in Windows and works. Anything else I type in Arch goes to null.

sendfile off worked though, thanks

Manit0u

Poland17875 Posts

March 05 2016 12:41 GMT

#14136

On March 05 2016 16:14 NovemberstOrm wrote:
I'm creating an application in VB.net, I need to have a next record/prev record button, I'm using hashtables atm, any ideas?

Can't you just call next() and previous() on a collection?

On March 05 2016 20:54 tofucake wrote:

Show nested quote +

.align-go {
    transform: translateY(75%);
    -webkit-transform: translateY(75%);
}

^ was written in Windows and works. Anything else I type in Arch goes to null.

sendfile off worked though, thanks

Really strange...

In the meantime, I've found another cool article/FAQ on Nginx:
https://www.nginx.com/resources/wiki/start/topics/tutorials/config_pitfalls/

Animzor

Sweden2154 Posts

March 05 2016 14:18 GMT

#14137

*edit nvm figured it out

Cyx.

Canada806 Posts

March 05 2016 18:12 GMT

#14138

On March 02 2016 15:19 Thaniri wrote:Based on everything I've ever heard about developer jobs you need to know how to jump through a million hoops just to pass the interview, lots of data structures and algorithm questions. But again, I have no experience so who am I to know personally.

I'm going to be applying to internships in 3-6 months and I didn't think it was worth applying until I did a slightly higher level data structures course.

From experience, I can tell you this idea is wrong

I had the exact same feelings in second year (which, for us, is the first year of software - first year engineering here is 'common core'), but I tried anyways, and I ended up getting hired by a place full of exceptionally talented people who cared more about my ability to learn quickly than about what I knew. It was probably the best six months for my development as a programmer so far. I would say that if you've done some programming and taken a course or two, you're more than ready to at least start trying to look for internships/summer jobs.

WarSame

Canada1950 Posts

March 05 2016 18:30 GMT

#14139

I will back up Cyx. No one knows much for the first few years. Just brush up on Data Structures and Algorithms and learn how to think through problems and you're set for any interview. They won't expect anything crazy from a newer student.

spinesheath

Germany8679 Posts

March 05 2016 19:04 GMT

#14140

I certainly didn't have to jump through a million hoops either. And I persnally wouldn't expect a whole lot from an average student either. You need practical experience to become a good programmer, and the average student doesn't have a lot of that. So if you get invited to an interview as a student chances are they aren't looking for an experienced professional, but rather someone with room to grow.

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