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How to install a gem or update RubyGems if it fails with a permissions error
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You don't have write permissions into the /Library/Ruby/Gems/1.8 directory.
means exactly that, you don't have permission to write there.
That is the version of Ruby installed by Apple, for their own use. While it's OK to make minor modifications to that if you know what you're doin...
Simple tool to 'accept theirs' or 'accept mine' on a whole file using git
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edited Oct 28 '16 at 22:55
Hisham H M
5,01811 gold badge2222 silver badges2525 bronze badges
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Getting the last argument passed to a shell script
$1 is the first argument.
$@ is all of them.
27 Answers
27
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Sleep in JavaScript - delay between actions
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11 Answers
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Installing PG gem on OS X - failure to build native extension
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15 Answers
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execute function after complete page load
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17 Answers
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Unable to run app in Simulator: Xcode beta 6 iOS 8
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132
I solved it following these steps:
Open Xcode 6 beta
Go to the menu Xcode > Open Develope...
汇编语言超浓缩教程（汇编入门必备） - C/C++ - 清泛网 - 专注C/C++及内核技术
...，不同的CPU其汇编语言的指令语法亦不相同。个人电脑由1981年推出至今，其CPU发展过程为：8086→80286→80386→80486→PENTIUM →……，还有AMD、CYRIX等旁支。后面兼容前面CPU的功能，只不过多了些指令（如多能奔腾的MMX指...
Java HashMap performance optimization / alternative
...around 20,000 codes for 26 million distinct objects. That is an average of 1,300 objects per hash bucket = very very bad. However if I turn the two arrays into a number in base 52 I am guaranteed to get a unique hash code for every object:
public int hashCode() {
// assume that both a an...
Looping through a hash, or using an array in PowerShell
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108
Christian's answer works well and shows how you can loop through each hash table item using th...