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javascript Programming Glossary: evaluatesWhat does “javascript:void(0)” mean? http://stackoverflow.com/questions/1291942/what-does-javascriptvoid0-mean void share improve this question The void operator evaluates the given expression and then returns undefined . The void operator..
http://stackoverflow.com/questions/1378619/javascript-operator cleverness share improve this question The operator evaluates to the first operand if it can be converted to true or the last..
Is there a better way to do optional function parameters in Javascript? http://stackoverflow.com/questions/148901/is-there-a-better-way-to-do-optional-function-parameters-in-javascript question Your logic fails if optionalArg is passed but evaluates as false try this as an alternative optionalArg typeof optionalArg..
What does = +_ mean in JavaScript http://stackoverflow.com/questions/15129137/what-does-mean-in-javascript Operators The unary plus operator precedes its operand and evaluates to its operand but attempts to converts it into a number if..
Resizing an iframe based on content http://stackoverflow.com/questions/153152/resizing-an-iframe-based-on-content an iframe with src '' specified. When its onload fires it evaluates its own height and sets the src of the iframe at this point..
What is the instanceof operator in JavaScript? http://stackoverflow.com/questions/2449254/what-is-the-instanceof-operator-in-javascript a String object One thing worth mentioning is instanceof evaluates to true if the object inherits from the classe's prototype var..
How to check for undefined or null variable in javascript http://stackoverflow.com/questions/2559318/how-to-check-for-undefined-or-null-variable-in-javascript should have the same effect. Unfortunately Firebug evaluates such a statement as error on runtime when some_variable is undefined.. simply returns undefined which when converted to boolean evaluates to false. So if you don't care about '0' and 'false' if obj.undefProp..
What does this construct (x = x || y) mean? http://stackoverflow.com/questions/2802055/what-does-this-construct-x-x-y-mean is common in Perl too. With the expression a OR b it evaluates to true if either a or b is true . So if a is true you don't.. so var title title Error basically checks if title evaluates to false . If it does it returns Error otherwise it returns..
http://stackoverflow.com/questions/3127429/javascript-this-keyword The ECMAScript Standard defines this as a keyword that evaluates to the value of the ThisBinding of the current execution context.. something that the JavaScript interpreter maintains as it evaluates JavaScript code like a special CPU register which holds a reference..
Location of parenthesis for auto-executing anonymous JavaScript functions? http://stackoverflow.com/questions/3384504/location-of-parenthesis-for-auto-executing-anonymous-javascript-functions automatic invocation make it a valid expression. It also evaluates to undefined. I don't think there's a right way of doing it..
Javascript: What does a comma do? http://stackoverflow.com/questions/3561043/javascript-what-does-a-comma-do share improve this question The comma operator evaluates both of its operands from left to right and returns the value.. Comma_Operator For example the expression 1 2 3 4 5 evaluates to 5 . Obviously the comma operator is useful only for operations..
Please explain the use of JavaScript closures in loops [duplicate] http://stackoverflow.com/questions/3572480/please-explain-the-use-of-javascript-closures-in-loops captured by the 'inner' closure The brace operators .. evaluates an expression in this case this function expression which yields..
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 case is when you compare a literal with an object that evaluates to the same literal due to its toString or valueOf method. For..
Is eval() and new Function() the same thing? http://stackoverflow.com/questions/4599857/is-eval-and-new-function-the-same-thing improve this question No they are not the same. eval evaluates a string as a JavaScript expression within the current execution..
Why is there a `null` value in JavaScript? http://stackoverflow.com/questions/461966/why-is-there-a-null-value-in-javascript The only real difference I can think of is that one evaluates to NaN the other to 0 in numeric contexts. So why is there both..
When loading an html page via ajax, will script tags be loaded? http://stackoverflow.com/questions/2203762/when-loading-an-html-page-via-ajax-will-script-tags-be-loaded a XML document that can be processed via jQuery. script Evaluates the response as JavaScript and returns it as plain text. Disables.. text. Disables caching unless option cache is used. json Evaluates the response as JSON and returns a JavaScript object. jsonp..
http://stackoverflow.com/questions/4744105/parse-and-execute-js-by-c-sharp 0 int IActiveScriptSite.OnLeaveScript return 0 summary Evaluates an expression using the specified language. summary param name.. expression return Eval language expression null summary Evaluates an expression using the specified language with an optional.. kvp.Value return engine.Eval expression summary Evaluates an expression. summary param name expression The expression...
Why is 'jQuery.parseJSON' not necessary? http://stackoverflow.com/questions/9111184/why-is-jquery-parsejson-not-necessary script tags are evaluated when inserted in the DOM. script Evaluates the response as JavaScript and returns it as plain text. Disables.. will turn POSTs into GETs for remote domain requests. json Evaluates the response as JSON and returns a JavaScript object. In jQuery..
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