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Reverse a string in Java
...use java.util.StringBuffer instead of StringBuilder — they have the same API. Thanks commentators for pointing out that StringBuilder is preferred nowadays when there is no concurrency concern.
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Javascript communication between browser tabs/windows [duplicate]
...t;p>Type into the text box below and watch the text
appear automatically in the receiver.</p>
<form name="sender">
<input type="text" name="message" size="30" value="">
<input type="reset" value="Clean">
</form>
<script type="text/javascript"><!--
func...
How to create GUID / UUID?
I'm trying to create globally-unique identifiers in JavaScript. I'm not sure what routines are available on all browsers, how "random" and seeded the built-in random number generator is, etc.
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Comparison of JSON Parser for Objective-C (JSON Framework, YAJL, TouchJSON, etc)
...he fastest library is JSONKit, followed by NSJSONSerialization (now public API) and NextiveJSON. SBJSON and TouchJSON are a little bit slower than the previous 3 libraries.
The comparison has been done using an iPhone 4S with iOS 5.0.1.
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How to ISO 8601 format a Date with Timezone Offset in JavaScript?
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The below should work properly, and for all browsers (thanks to @MattJohnson for the tip)
Date.prototype.toIsoString = function() {
var tzo = -this.getTimezoneOffset(),
dif = tzo >= 0 ? '+' : '-',
pad = function(num) {
va...
How to get the previous URL in JavaScript?
... submitting a form?). Specified by DOM Level 2. More here.
window.history allows navigation, but not access to URLs in the session for security and privacy reasons. If more detailed URL history was available, then every site you visit could see all the other sites you'd been to.
If you're dealing...
Hide div after a few seconds
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You can try the .delay()
$(".formSentMsg").delay(3200).fadeOut(300);
call the div set the delay time in milliseconds and set the property you want to change, in this case I used .fadeOut() so it could be animated, but you can use .hide() as well.
http://api.jquery.com/delay/
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Setting Android Theme background color
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Okay turned out that I made a really silly mistake. The device I am using for testing is running Android 4.0.4, API level 15.
The styles.xml file that I was editing is in the default values folder. I edited the styles.xml in values-v14 folder and it works ...
What is database pooling?
...------+ +-----------+
In it's simplest form, it's just a similar API call (1) to an open-connection API call which is similar to the "real" one. This first checks the pool for a suitable connection (2) and, if one is available, that's given to the client. Otherwise a new one is created (3)...
How to add and get Header values in WebApi
I need to create a POST method in WebApi so I can send data from application to WebApi method. I'm not able to get header value.
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