javascript Programming Glossary: thatHow do JavaScript closures work? http://stackoverflow.com/questions/111102/how-do-javascript-closures-work foo with an Object the closure it returns will reference that original Object function foo x var tmp 3 return function y alert.. 10 will increment x.memb . What might not be expected is that x is simply referring to the same object as the age variable..
Access / process (nested) objects, arrays or JSON http://stackoverflow.com/questions/11922383/access-process-nested-objects-arrays-or-json console console.log data.items Object Object Here we see that that data.items is an array with two elements which are both.. console.log data.items Object Object Here we see that that data.items is an array with two elements which are both objects... 1 Object id 2 name bar __proto__ Object This tells us that data.items 1 is an object and after expanding it we see that..
var functionName = function() {} vs function functionName() {} http://stackoverflow.com/questions/336859/var-functionname-function-vs-function-functionname and what are the pros and cons of each Is there anything that can be done with one method that can't be done with the other.. of each Is there anything that can be done with one method that can't be done with the other javascript function syntax idioms.. idioms share improve this question The difference is that functionOne is defined at run time whereas functionTwo is defined..
Does it matter which equals operator (== vs ===) I use in JavaScript comparisons? http://stackoverflow.com/questions/359494/does-it-matter-which-equals-operator-vs-i-use-in-javascript-comparisons used throughout the file. Would I be correct in assuming that if no type conversion takes place there would be a small probably.. attempt to coerce the values. the rules by which they do that are complicated and unmemorable. These are some of the interesting.. special case is when you compare a literal with an object that evaluates to the same literal due to its toString or valueOf..
http://stackoverflow.com/questions/5874652/prop-vs-attr but the prop as a CSSStyleDeclaration Why And how does that affect my coding in the future javascript jquery dom attr prop.. Not so good for the bazillions of sites using jQuery that will break as a result of this change though. I'll summarize.. simpler to deal with than attributes consider a checkbox that is initially checked. Here are two possible pieces of valid..
Is JavaScript's Floating-Point Math Broken? http://stackoverflow.com/questions/588004/is-javascripts-floating-point-math-broken the absolute value of their differences and make sure that this difference is smaller than the Epsilon value which is a..
Javascript closure inside loops - simple practical example http://stackoverflow.com/questions/750486/javascript-closure-inside-loops-simple-practical-example share improve this question Well the problem is that the variable i within each of your anonymous functions is bound.. the function creation in a new function you ensure that the value of i remains as you intended. share improve this..
How can I get query string values in JavaScript? http://stackoverflow.com/questions/901115/how-can-i-get-query-string-values-in-javascript share improve this question You don't need jQuery for that purpose. You can use vanilla JavaScript function getParameterByName..
How do JavaScript closures work? http://stackoverflow.com/questions/111102/how-do-javascript-closures-work an argument to foo and it can also access tmp from foo . That is a closure. A function doesn't have to return in order to..
Why does jQuery or a DOM method such as `getElementById` not find the element? http://stackoverflow.com/questions/14028959/why-does-jquery-or-a-dom-method-such-as-getelementbyid-not-find-the-element Browsers parse and process the HTML from top to bottom. That means that any call to a DOM element which occurs before that..
Elegant workaround for JavaScript floating point number problem http://stackoverflow.com/questions/1458633/elegant-workaround-for-javascript-floating-point-number-problem Floating Point Guide What can I do to avoid this problem That depends on what kind of calculations you 胩e doing. If you really..
How do I “think in AngularJS” if I have a jQuery background? http://stackoverflow.com/questions/14994391/how-do-i-think-in-angularjs-if-i-have-a-jquery-background is trying to do jQuery in the context of AngularJS. That's never going to work well. The view is the official record... a template it should also respect separation of concerns. That is the template too should remain largely independent from its..
Generating random numbers in Javascript in a specific range? http://stackoverflow.com/questions/1527803/generating-random-numbers-in-javascript-in-a-specific-range a number in the min max interval x Math.random max min min That was the first function from MDC. The second one returns an integer..
How to “properly” create a custom object in JavaScript? http://stackoverflow.com/questions/1595611/how-to-properly-create-a-custom-object-in-javascript won't do anything Which way is 𦑩roper Both. Which is �best That depends on your situation. FWIW I tend towards prototyping for..
How can I obfuscate JavaScript? http://stackoverflow.com/questions/194397/how-can-i-obfuscate-javascript some kind of encryption which is decrypted at page load. That would probably be one of the most secure options but also a..
How do you determine equality for two JavaScript objects? http://stackoverflow.com/questions/201183/how-do-you-determine-equality-for-two-javascript-objects equal to another instance that it otherwise identical That question can only be answered in each specific case for each..
http://stackoverflow.com/questions/2067472/what-is-jsonp-all-about as an input argument of the call itself. Huh What call That doesn't make any sense to me. JSON is a data format. There's.. that tells the server a little bit about your page. That way the server is able to nicely wrap up its response in a way..
How do I get started with Node.js http://stackoverflow.com/questions/2353818/how-do-i-get-started-with-node-js Node.js the Right Way Practical Server Side JavaScript That Scale Courses Real Time Web with Node.js Blogs The Node.js blog..
Loop through array in JavaScript http://stackoverflow.com/questions/3010840/loop-through-array-in-javascript alert array i The above code will alert a b c and foo . That be particularly a problem if you use some library that relies..
How do I get the name of an object's type in JavaScript? http://stackoverflow.com/questions/332422/how-do-i-get-the-name-of-an-objects-type-in-javascript Array true So that works well enough for most needs. That said... Caveats An example where it isn't as obvious is using..
Does it matter which equals operator (== vs ===) I use in JavaScript comparisons? http://stackoverflow.com/questions/359494/does-it-matter-which-equals-operator-vs-i-use-in-javascript-comparisons the same type and returning false . Which one is correct That really depends on what you're trying to compare. My advice is..
XmlHttpRequest error: Origin null is not allowed by Access-Control-Allow-Origin http://stackoverflow.com/questions/3595515/xmlhttprequest-error-origin-null-is-not-allowed-by-access-control-allow-origin allow cross domain XMLHttpRequest if the server OKed it. That's where the Access Control Allow Origin header came in. I believe.. to jsonp if it sees the substring callback in the URL. That solved the second by no longer trying to perform a CORS request..
How to execute a JavaScript function when I have its name as a string http://stackoverflow.com/questions/359788/how-to-execute-a-javascript-function-when-i-have-its-name-as-a-string be the best way to do it window functionName arguments That however will not work with a namespace'd function window My.Namespace.functionName..
Is JavaScript 's “new” Keyword Considered Harmful? [closed] http://stackoverflow.com/questions/383402/is-javascript-s-new-keyword-considered-harmful of the language have sparked many useful discussions. That said there are far too many people that take each proclamation..
Take a screenshot of a webpage with javascript? http://stackoverflow.com/questions/60455/take-a-screenshot-of-a-webpage-with-javascript H2C CaptWindow H2 0 keybd_event H12 0 H2 0 End Sub That only gets you as far as getting the window to the clipboard...
Most elegant way to clone a JavaScript object http://stackoverflow.com/questions/728360/most-elegant-way-to-clone-a-javascript-object the data in the objects and arrays form a tree structure. That is there isn't more than one reference to the same data in the..
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