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How do I copy a hash in Ruby?

I'll admit that I'm a bit of a ruby newbie (writing rake scripts, now). In most languages, copy constructors are easy to find. Half an hour of searching didn't find it in ruby. I want to create a copy of the hash so that I can modify it without affecting the original instance. ...
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How do I format a string using a dictionary in python-3.x?

I am a big fan of using dictionaries to format strings. It helps me read the string format I am using as well as let me take advantage of existing dictionaries. For example: ...
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What is the difference between “Rollback…” and “Back Out Submitted Changelist #####” in Perforce P4V

...re essentially faster, safer ways of undoing mistakes than using the p4 obliterate command (and you don't need admin access to use them). In the case of "Rollback...", this could be any number of files, even an entire depot. You can tell it to rollback to a specific revision, changelist, or labe...
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Memcache Vs. Memcached [duplicate]

... What are the advantages of one over the other? Can you also suggest the criteria used to choose between one or the other? ...
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How do you remove Subversion control for a folder?

I have a folder, c:\websites\test , and it contains folders and files that were checked out from a repository that no longer exists. How do I get Subversion to stop tracking that folder and any of the subfolders and files? ...
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How to resolve : Can not find the tag library descriptor for “http://java.sun.com/jsp/jstl/core” [du

The Eclipse IDE is showing red underline and when I focus it the tag is : can not find the library descriptor for http://java.sun.com/jsp/jstl/core ...
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Async/Await vs Threads

In .Net 4.5 Microsoft has added the new Async/Await feature to simplify asynchronous coding. However, I wonder 3 Answers...
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How to use UIVisualEffectView to Blur Image?

...bjective-C: UIVisualEffect *blurEffect; blurEffect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight]; UIVisualEffectView *visualEffectView; visualEffectView = [[UIVisualEffectView alloc] initWithEffect:blurEffect]; visualEffectView.frame = imageView.bounds; [imageView addSubview:visualEffec...
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Auto layout constraints issue on iOS7 in UITableViewCell

I'm using auto layout constraints programmatically to layout my custom UITableView cells and I'm correctly defining the cell sizes in tableView:heightForRowAtIndexPath: ...
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Get an array of list element contents in jQuery

... I've never seen it traverse the DOM in any other way that normal reading order. So although I can't prove it, I would bet the farm that it alwaays traverses the DOM top to bottom :) – Flater Aug 8 '12 a...