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How to check that a string is a palindrome using regular expressions?

... all palindromes. The proof relies on the facts that we can easily build a string that requires an arbitrarily large number of nodes, namely the string a^x b a^x (eg., aba, aabaa, aaabaaa, aaaabaaaa, ....) where a^x is a repeated x times. This requires at least x nodes because, after seeing the 'b...
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How to create a drop shadow only on one side of an element?

..."></div> UPDATE 3 All my previous answers have been using extra markup to get create this effect, which is not necessarily needed. I think this a much cleaner solution... the only trick is playing around with the values to get the right positioning of the shadow as well as the right...
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Create and append dynamically

...amic this is is, but sometimes this might save your debugging life: var daString="<div id=\'block\' class=\'block\'><div class=\'block-2\'></div></div>"; var daParent=document.getElementById("the ID of whatever your parent is goes in here"); daParent.innerHTML=daString; "R...
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HTML character decoding in Objective-C / Cocoa Touch

...;number>; they are called numeric entity references. Basically, it's a string representation of the byte that should be substituted. In the case of &, it represents the character with the value of 38 in the ISO-8859-1 character encoding scheme, which is &. The reason the ampersand...
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Select elements by attribute

...he above will fall into the else-branch when myattr exists but is an empty string or "0". If that's a problem you should explicitly test on undefined: if ($('#A').attr('myattr') !== undefined) { // attribute exists } else { // attribute does not exist } ...
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What's the difference between a proxy server and a reverse proxy server? [closed]

What is the difference between a proxy server and a reverse proxy server? 21 Answers 2...
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Factory pattern in C#: How to ensure an object instance can only be created by a factory class?

...work, and make the constructor private? public BusinessClass { public string MyProperty { get; private set; } private BusinessClass() { } private BusinessClass(string myProperty) { MyProperty = myProperty; } public static BusinessClass CreateObject(string ...
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how to use python to execute a curl command

...o see this, the reason why that was happening to me is that I was giving a string as my payload instead of a dictionary object. – tricknology Apr 24 '15 at 22:37 1 ...
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How do I right align controls in a StatusStrip?

...lStripLabel to pseudo right align controls by setting the Text property to string.Empty and setting the Spring property to true. This will cause it to fill all of the available space and push all the controls to the right of the ToolStripLabel over. ...
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How to do if-else in Thymeleaf?

...e 'authentication' and 'authorization' utility objects came from thymeleaf extras springsecurity3 library. When 'authentication' object is not available OR authorization.expression('isAuthenticated()') evaluates to 'false', expression returns ${false}, otherwise ${true}. ...