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Concat Not Working Java

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ValI guess that's just a matter of taste. So I consider it quite efficient, but then again I have no benchmarks to prove that. If you need the original first array, make a copy of it before calling $.merge(). This would help others to view your code and understand the problem. have a peek at this web-site

Concat Not Working Java

ES6 => arrow-functions will slim them down slightly, but it's still requiring a function-per-item call, which is unfortunate. scriptUrls = scriptUrls.concat(urls); Or if you want to keep the original scriptUrls Array, you can .push() the values in. So why not implement that...By David WalshDecember 23, 2013FullscreenAPIAs we move toward more true web applications, our JavaScript APIs are doing their best to keep up.  One very simple but useful Strings, numbers and booleans (not String, Number, and Boolean objects): concat copies the values of strings and numbers into the new array.

Kyle [email protected]: I wasn't really asserting optimizations. Do electronics distributers test each component before sending them out? The first major problem is that we're effectively doubling the size (temporarily, of course!) of the thing being appended by essentially copying its contents to the stack for the function call. Javascript Concat Arrays Since JavaScript vars are passed by reference, concat may mess up a reference.

Also, please note that even if the approach looks like it's using less memory it might not be the case. Most array and string methods require an assignment to make the changes, such as replace or concat but other's don't such as splice for example. –elclanrs Oct 10 '12 at 0:40 Personally, even then I'd prefer my method operating on [].concat(b) simply for readability reasons. Examples might be simplified to improve reading and basic understanding.

function cheatCombine(a,b) { return { forEach: function(iter) { var alen = a.length, len = alen + b.length for (var i = 0; i < len; i++) { if (i < alen) Lodash Concat IlyaVFI think by this statement the author meant something like this: var a = [1,2,3]; var b = a; a = a.concat([4,5]); a // -> [1,2,3,4,5]; b // -> [1,2,3] Whereas Encasing a star in a perfect insulator How do you simplify a log with an exponent in the base? Is there an actual army in 1984?

Javascript String Concat Not Working

Note: You can try the same thing with splice(..), but you'll have the same conclusions as with push(..) / unshift(..). One option would be to use this approach, but batch up segments at the max safe size: function combineInto(a,b) { var len = a.length; for (var i=0; i < len; i=i+5000) Concat Not Working Java Sold my Canon EOS 5D Mark II and buyer says images are not in focus more hot questions question feed default about us tour help blog chat data legal privacy policy Javascript Array Concat Is Not A Function What is the meaning of "cow in the middle"?

Thanks to this article, I won't have to use this tool again. his comment is here I created a new post about 15 Javascript Hacks and I wrote one tip about combining arrays, of course I added this post as reference :) The post is in portuguese My code is as follows: // VARIABLES var answer; var correctAnswers = []; var wrongAnswers = []; var questions = [ ["How many paws a dog has?", "4"], ["What is the Furthermore, any operation on the new array(only if the element is not object reference) will have no effect on the original arrays, and vice versa. _.concat Is Not A Function Lodash

second Type: ArrayLikeObject The second array-like object to merge into the first, unaltered. As expected, that one does its job: http://jsfiddle.net/loopmode/mh0q345e/3/ Caio Ribeiro PereiraNice post! If all you want is to be able to forEach over it later this is all you need. this contact form You need to overwrite the old one.

E.g. Lodash Merge Arrays version added: 1.0jQuery.merge( first, second ) first Type: ArrayLikeObject The first array-like object to merge, the elements of second added. The push method expects comma separated arguments to be used as a new elements for the array to push to.

javascript arrays object for-loop concat share|improve this question asked Nov 19 '13 at 18:58 kristiyan.mitev 82 add a comment| 1 Answer 1 active oldest votes up vote 11 down vote accepted

var len = this.length = element.length; while(len--){ this[len] = element[len]; } Just a small use case inside of a function constructor. Emil PirfaltDepending on what you are going to However, the GC should be really fast though, as the I think the strings will end up on the stack and not the heap. Let's start with the scenario: var a = [ 1, 2, 3, 4, 5, 6, 7, 8, 9 ]; var b = [ "foo", "bar", "baz", "bam", "bun", "fun" ]; The Javascript Add Array To Array share|improve this answer edited Oct 10 '12 at 0:45 answered Oct 10 '12 at 0:38 I Hate Lazy 25.9k45363 1 That's right, people often misunderstand JS in this aspect.

Log In Concat() doesn't work JavaScript IanYang 2010-05-23 19:54:09 UTC #1 The following code does not work. So, if the array being added on has a million items in it, you'd almost certainly way exceed the size of the size of the stack allowed for that push(..) or It's my first one. navigate here So what is the difference between using this method and Array.prototype.push.apply(array1, array2)? Aaron"Since JavaScript vars are passed by reference, concat may mess up a reference." What does this mean?

My method in the post does not. Ryan MurphyI wish you posted this 2 days ago :) I went back and refactored. Anyways, thanks for the great article! Please check your inbox or your spam filter for an email from us. I was having a hard time trying to make it readable.

up vote 3 down vote favorite I'm running the following code on Webkit: var scriptElements = document.scripts; var scriptUrls = []; // URL matching var regexp = /\b((?:[a-z][\w-]+:(?:\/{1,3}|[a-z0-9%])|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}\/)(?:[^\s()<>]+|\(([^\s()<>]+|(\([^\s()<>]+\)))*\))+(?:\(([^\s()<>]+|(\([^\s()<>]+\)))*\)|[^\s`!()\[\]{};:'".,<>?«»“”‘’]))/i; for (var i It's the most subtle of details but just enforces than an action is taking place. So an object which has a length param would be better suited to go by the length property (if the values are as referenced). e.g.

more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed But of course, I'm pretty sure there are cases where changing an existing array may be required) BerkanaYou could save yourself a bunch of typing by doing [].push.apply(array1, array2); since But, things aren't as rosy as they might seem. I use it to validate dialogs.

I shouldn't be trying to code this late I guess. But you could do list.get(i) instead of array[i] . Emil PirfaltSometimes it's ok to cheat.