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How to URL encode a string in Ruby

... between them is their handling of spaces: >> ERB::Util.url_encode("foo/bar? baz&") => "foo%2Fbar%3F%20baz%26" >> CGI.escape("foo/bar? baz&") => "foo%2Fbar%3F+baz%26" CGI.escape follows the CGI/HTML forms spec and gives you an application/x-www-form-urlencoded string, w...
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Sort JavaScript object by key

...uestion are outdated, never matched implementation reality, and have officially become incorrect now that the ES6/ES2015 spec has been published. See the section on property iteration order in Exploring ES6 by Axel Rauschmayer: All methods that iterate over property keys do so in the same ord...
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C++ map access discards qualifiers (const)

...sting. I would think C++ would distinguish between lvalue operator[] (e.g. foo[bar] = baz) and rvalue operator[] (e.g. x = foo[bar]) - the latter could certainly be const. – Claudiu May 12 '14 at 18:27 ...
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Where does Scala look for implicits?

... Implicits in Scala refers to either a value that can be passed "automatically", so to speak, or a conversion from one type to another that is made automatically. Implicit Conversion Speaking very briefly about the latter type, if one calls a method m on an object o of a class C, and that class d...
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How to use filter, map, and reduce in Python 3

... longer return lists: [...] map() and filter() return iterators. If you really need a list, a quick fix is e.g. list(map(...)), but a better fix is often to use a list comprehension (especially when the original code uses lambda), or rewriting the code so it doesn’t need a list at all. Particular...
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What's the best way to iterate over two or more containers simultaneously

...wrote this wrapper around boost range: a function with one line of code is all I need. However, I would be interested if the performance of boost ranges is optimal as well. – SebastianK Nov 6 '14 at 15:45 ...
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What is the Scala identifier “implicitly”?

...Implicit Views). In this case, the compiler looks for implicit members, locally defined in the current or enclosing scopes, inherited, or imported, that are either Functions from the type of that the.prefix to a type with selection defined, or equivalent implicit methods. scala> 1.min(2) // Int ...
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Set select option 'selected', by value

... I had to manually call .val(x).change(); to trigger the select's onChange event, it seems setting val() doesn't fire it. – scipilot Jul 19 '15 at 5:48 ...
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How to spyOn a value property (rather than a method) with Jasmine

...ue as needed. const spy = spyOnProperty(myObj, 'myGetterName', 'get').and.callThrough(); // Call the real thing. Here's the line in the github source code where this method is available if you are interested. https://github.com/jasmine/jasmine/blob/7f8f2b5e7a7af70d7f6b629331eb6fe0a7cb9279/src/cor...
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How to check if a value exists in a dictionary (python)

... it wasn't necesarry after all, unless run on bigger dict. I guess overhead in values() is caused by copying the value list and in viewvalues() by maintaining the view alive. – soulcheck Nov 21 '11 at 17:12 ...