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• Javascript switch vs. if...else if...else

  - by John Hartsock

  Guys I have a couple of questions: Is there a preformance difference in Javascript between a switch statement and an if...else if....else? If so why? Is the behavior of switch and if...else if...else different across browsers? (FireFox, IE, Chrome, Opera, Safari)

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• Call javascript from MVC controller action

  - by Grienders

  Can I call javascript function from MVC controller action (not from view page) and get return value? How?

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• quick [php function] -> [javascript function] question

  - by Haroldo

  if anyone fancies doing me a really quick favour, it would be really appreciated: static function make_url_safe($z){ $z = strtolower($z); $z = preg_replace('/[^a-zA-Z0-9\s] /i', '', $z); $z = str_ireplace(' ', '-', $z); return $z; } what js functions should i be looking at to convert this function to javascript?

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• JavaScript: Is there any "python's Generator" equivalent in JavaScript?

  - by JackSMTV

  Is there any "python's Generator" equivalent in JavaScript? PS: Python's Generator is very memory efficient when we need to do one time iterate through a big array, hash... "Generators are iterables, but you can only read them once. It's because they do not store all the values in memory, they generate the values on the fly" (Python's Generator explained in this thread: The Python yield keyword explained )

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• javascript / html - visit duration on page

  - by user360322

  Is there a way to use javascript to determine how long someone was looking at my webpage before they closed their browser or hit the back button? Something like send a message to php page every few seconds or so in the background?

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• how could i send parameter to a servlet in post method using javascript

  - by kawtousse

  Hi, I want to send a value to a servlet using the javascript and get it in servlet in post method. thanks.

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• Pattern match and replace in Javascript

  - by T_t

  There is something in my mind: In a web page,there are lots of things we can see from our browser.One of them is text. Now i have some patterns,"abc","hello",or some other strings.In the text, i want to find all the patterns and change the color or background-color of them. Like this: text: what a wonderful day! pattern: "a","day" resulet: what a wonderful day! How can solve this whit Javascript?

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• Convert opacity to hex in Javascript

  - by John

  What would be the preferred way to convert opacity (0 - 1) to hex (00 - ff) in Javascript? My thoughts are to use an if statement to check if opacity is between 1 and 0.95 then use ff. Work my way down to 0.

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• javascript (jquery) calendar plugin

  - by Ryan

  Does any know of a good calendar (not datepicker, but a BIG browsable calendar) plugin for one of the major javascript frameworks. I'd prefer jQuery.

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• Get Degrees (0-360) from One LatLng to Another in JavaScript

  - by Kirk

  Can someone help me fill in the blanks with native JavaScript? function getHeading(lat1, lon1, lat2, lon2) { // Do cool things with math here return heading; // Should be a number between 0 and 360 } I've been messing around with this for a long time and can't seem to get my code to work right.

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• Javascript syntax for abbreviating repeated access to same identifier

  - by yongjieli

  Hi all I wanted to ask if there is a formal way of describing the following code, whereby we can access the same object repeatedly without re-typing the object's identifier: myObj.render(1).render(2).print(); I didn't know how to describe it when trying to form a question; I wanted to know whether or not something like this is possible in javascript, I know that I can do it in VB: myObj.render(1) if(foo == 'bar') .render(2) .print(); Thanks!

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• Best resources to learn JavaScript

  - by Tarks

  The question says it all really, I'm looking for book recommendations, video tutorials etc. I've been programming since I was about six so I don't need a book that spends 4 pages on for loops (thought that might be a Bad example in terms of javascript). Also I'm learning ASP.net at the moment so anything on interoperability features/issues would be welcome, though I'm guessing I just showed my ignorance with that question.

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• Get page url using javascript

  - by Alex

  Hello, could some one recommend a way to get page name from a url using JavaScript? For instance if I have http://www.cnn.com/news/1234/news.html?a=1&b=2&c=3 I just need to get "news.html" string Thanks!

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• Javascript function to add X months to a date

  - by George

  Is there a built in equivalent to the .NET framework's DateAdd or AddMonths functions? I'm looking for the easiest, cleanest way to add X month to a Javascript date. I'd rather not handle the rolloing over of the year as done here. or have to write my own function as done here. Is there something built in that is as nice as the .NET Date.AddMonths function? Or something close?

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• If the URL contains this do that in Javascript

  - by Sam

  I want to display a certain message on a certain page. Suppose the name of the page I want to display something on is called "foo_page.html", How can I do this using javascript?

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• javascript if statement

  - by mike

  Hi, In javascript, how can I test 2 "sets" of conditions in one if statement? example: if ((a == 'someValue' && b == 'someValue') || (c == 'someValue' && d == 'someValue')) { // do something } Thanks!

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• loading an image through javascript

  - by scatman

  is there a way to load the full binary of an image in javascript? what i want to do is to allow the user to preview an image before uploading it. ie the user selects an image on his local drive (C:\image.jpg) , view it, and decides to upload or cancel. i tried to set the source to the image path, but it didn't work since it is outside the webapplication project folder. any help?

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• disabled an input type text with javascript

  - by kawtousse

  Hi, I want to disable writing in an input type text using javascript the input type text is populated from database that is why i don't want that user modify its value. Thinks for help

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• javascript function name collision

  - by haroldis-nio

  I have two JavaScript files that contain a jQuery function with the same name $(). How can I distinguish between the two identically named functions?

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• Converting such an array from PHP to JavaScript?

  - by dfjhdfjhdf

  How to convert such an array from PHP to JavaScript?: $arr = array('oneKey' => array('key1' => 'value1', 'key2' => 'value2'), 'anotherKey => array('key1 => 'value1', 'key2 => 'value2'));

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• a simple problem about RegExp in Javascript

  - by T_t

  I have a text: <font class="myclass">class abc</font> and i have a pattern: class now, i want to find the word "class" before "abc" but not in the <font class="myclass"> ,how could i do with RegExp in javascript? Thanks! :)

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• make objects and fields dynamically in javascript

  - by acidzombie24

  instead of using getParameterByName('Field', PostData) (PostData == $('form').serialize();) I would like to write PostData.Field, how can i do that with javascript?

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• Javascript Date: Ensure getMinutes(), getHours(), getSeconds() puts 0 in front if necessary

  - by Mega Matt

  Hi all, Looking for a creative way to be sure values that come from the getHours, getMinutes, and getSeconds() method for the javascript Date object return "06" instead of 6 (for example). Are there any parameters that I don't know about? Obviously I could write a function that does it by checking the length and prepending a "0" if need be, but I thought there might be something more streamlined than that. Thanks.

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• Does this create an array in JavaScript?

  - by As

  I am using the following JavaScript code: var a = [23, 34, 45, 33]; Is a considered an array of integers?

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• Google AJAX Language API with Chinese language

  - by Den Thomas

  Hey guys! Does anyone know if there is support for Chinese pinyin? I get the results here with correct Chinese pinyin (see "Show romanization" link). Thank you.

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