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What characters are valid for JavaScript variable names?
... in a single ASCII-only regular expression for JavaScript, it would be 11,236 characters long. Here it is:
// ES5.1 / Unicode 6.1
/^(?!(?:do|if|in|for|let|new|try|var|case|else|enum|eval|false|null|this|true|void|with|break|catch|class|const|super|throw|while|yield|delete|export|import|public|retur...
pass **kwargs argument to another function with **kwargs
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163
In the second example you provide 3 arguments: filename, mode and a dictionary (kwargs). But Pyt...
View a file in a different Git branch without changing branches
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UPDATE 2015-01-19:
Nowadays you can use relative paths with git show a1b35:./file.txt.
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Shortcut to switch between design and text in Android Studio
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edited Mar 19 at 8:39
answered Dec 19 '13 at 13:35
G...
How to express a NOT IN query with ActiveRecord/Rails?
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316
Rails 4+:
Article.where.not(title: ['Rails 3', 'Rails 5'])
Rails 3:
Topic.where('id NOT I...
Simple explanation of MapReduce?
...hem back in the same kind of list.
suppose I have a list of numbers: [1,2,3] and I want to double every number, in this case, the function to "double every number" is function x = x * 2. And without mappings, I could write a simple loop, say
A = [1, 2, 3]
foreach (item in A) A[item] = A[item] * 2
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Increasing nesting function calls limit
... limit in PHP: if you call some function a1() that calls a2(), that calls a3... so when a99() will call a100() you will see
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Routes with Dash `-` Instead of Underscore `_` in Ruby on Rails
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With Rails 3 and later you can do like this:
resources :user_bundles, :path => '/user-bundles'
Another option is to modify Rails, via an initializer.
I don't recommend this though, since it may break in future versions (edit: do...