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How to get a random number in Ruby
...relying on
you want separate reproducible sequences of random numbers (say one per thread)
you want to be able to save and resume a reproducible sequence of random numbers (easy as Random objects can marshalled)
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Finding the handle to a WPF window
...re asking for the Application's main window, of which there will always be one. You can use this same technique on any Window, however, provided it is a System.Windows.Window derived Window class.
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D3.js: what is 'g' in .append(“g”) D3.js code?
...t different from the use case of "grouping" in graphical drawings such
as ones you would do in a powerpoint presentation.
http://tutorials.jenkov.com/svg/g-element.html
As pointed in above link: to translate you need to use translate(x,y):
The <g>-element doesn't have x and y attribute...
Compress files while reading data from STDIN
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... and how does one do that? Is it really a separate question?
– russellpierce
Mar 8 '15 at 14:26
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How to get href value using jQuery?
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if the page have one <a> It Works，but，many <a> ,have to use var href = $(this).attr('href');
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Copy folder recursively, excluding some folders
... on default install of most of the *nix like OSes. Taring and untaring is done on the fly with no file system artefact (in memory), cost of this tar+untar is negligible.
– AmokHuginnsson
Feb 8 '16 at 18:42
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Find a pair of elements from an array whose sum equals a given number
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You could even do it in one iteration through the array, by putting your if statement from the second loop, right after the hash assignment in the first loop.
– Alexander Kondratskiy
Jan 18 '11 at 16:06
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What is the difference between __init__ and __call__?
... many scenarios where you might want to redefine your object, say you are done with your object, and may find a need for a new object. With __call__ you can redefine the same object as if it were new.
This is just one case, there can be many more.
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How to get awaitable Thread.Sleep?
...recisely for this purpose:
// Execution of the async method will continue one second later, but without
// blocking.
await Task.Delay(1000);
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How to build for armv6 and armv7 architectures with iOS 5
...cations so it would work correctly under iOS5, but all those changes were done with iOS4-friendly code changes.
We also added some iOS5-specific capabilities in a manner that allows the app to run without crashing under iOS4. Specifically, we tested for iOS5 capabilities before trying to use them, ...