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Create an array with same element repeated multiple times
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It's much more efficient to allocate all of the entries up front, with arr = new Array(len);, then assign to them by index in the loop, i.e. arr[i] = value;. That way you only pay O(n) rather than having to keep reallocating the array as it grows. In ...
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize
...XX:MaxMetaspaceSize option.
-XX:PermSize=size
Sets the space (in bytes) allocated to the permanent generation that triggers a garbage collection if it is exceeded. This option was deprecated in JDK 8, and superseded by the -XX:MetaspaceSize option.
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Rails: Is there a rails trick to adding commas to large numbers?
... either , or . for decimal digits, even if you specify it as argument). It allocates thousands of objects (so its performance patterns are complex and hard to profile). Consider just using regexps if you don't need to support different ways to format numbers depending on locale.
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Javascript object Vs JSON
...me. A JavaScript object on the other hand is a physical type. Just like a PHP array, a C++ class/ struct, a JavaScript object is an type internal to JavaScript.
Here's a story. Let's imagine you've purchased some furniture from a store, and you want it delivered. However the only one left in stock...
How to validate an email address using a regular expression?
...e more sophisticated patterns in Perl and PCRE (regex library used e.g. in PHP) can correctly parse RFC 5322 without a hitch. Python and C# can do that too, but they use a different syntax from those first two. However, if you are forced to use one of the many less powerful pattern-matching language...
Draw a perfect circle from user's touch
...Hough Transform is a voting scheme. A two dimensional array of integers is allocated and all elements are set to zero. Each element corresponds to a single pixel in the image being analyzed. This array is referred to as the accumulator array since each element will accumulate information, votes, ind...
Grep and Sed Equivalent for XML Command Line Processing
...am, and pass in the arguments' array in the script to hpricot? E.g., in a PHP shell script, something like the following should work: <?php /path/to/hpricot $argv ?>
– alastairs
Sep 18 '08 at 20:45
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Split string to equal length substrings in Java
...s trick will work (for example) in Java, Perl, .NET and JGSoft, but not in PHP (PCRE), Ruby 1.9+ or TextMate (both Oniguruma). JavaScript's /y (sticky flag) isn't as flexible as \G, and couldn't be used this way even if JS did support lookbehind.
I should mention that I don't necessarily recommend...
Remove HTML Tags from an NSString on the iPhone
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UITextView *textview= [[UITextView alloc]initWithFrame:CGRectMake(10, 130, 250, 170)];
NSString *str = @"This is <font color='red'>simple</font>";
[textview setValue:str forKey:@"contentToHTMLString"];
textview.textAlignment = NSTextAlignmentLeft;
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XPath: select text node
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Does this work in PHP? I'm trying to loop through only text nodes, even those in-between a set of tags. The problem is that is smashing the content of multiple text nodes together, regardless of tags. Using //*[text()] anyway. /html/text() doe...