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How to add new item to hash
...ou'll see that you're actually creating a new hash each time. Probably not what you want. And if that is what you want, you don't need the Hash.new part regardless, because Hash[] is already creating a new hash.
– philomory
Aug 12 '16 at 1:03
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Rails mapping array of hashes onto single hash
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You could compose Enumerable#reduce and Hash#merge to accomplish what you want.
input = [{"testPARAM1"=>"testVAL1"}, {"testPARAM2"=>"testVAL2"}]
input.reduce({}, :merge)
is {"testPARAM2"=>"testVAL2", "testPARAM1"=>"testVAL1"}
Reducing an array sort of like sticking a metho...
Linux error while loading shared libraries: cannot open shared object file: No such file or director
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Update
While what I write below is true as a general answer about shared libraries, I think the most frequent cause of these sorts of message is because you've installed a package, but not installed the "-dev" version of that package.
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String's Maximum length in Java - calling length() method
In Java , what is the maximum size a String object may have, referring to the length() method call?
7 Answers
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How can I add a key/value pair to a JavaScript object?
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what if the key is a number? obj.123 = 456 doesn't work. obj[123] = 456 does work though
– axel freudiger
Nov 2 '12 at 10:39
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About Python's built in sort() method
What algorithm is the built in sort() method in Python using? Is it possible to have a look at the code for that method?
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RegEx to find two or more consecutive chars
...for a consecutive repeat of that character. If you wish to be specific on what characters you wish to find are identical consecutive, just replace the "any character" with a character class...
([a-zA-Z])\1
Finds a consecutive repeating lower or upper case letter. Matches on "abbc123" and not "ab...
Gradients on UIView and UILabels On iPhone [duplicate]
...ation property, and really shouldn't be expressed in code at all. This is what graphics guys are for. Writing code to express colors is a poor separation of logic from presentation. When the marketing team decides to change the colors, and a graphics guy asks how to do that, he's not going to lik...
How to resize an Image C#
.... Bitmap is essentially just the name of the class, you can save it out as whatever file type you like.
– mpen
Jun 10 '16 at 20:33
6
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Hidden features of C
...ely(x) __builtin_expect((x),0)
see: http://kerneltrap.org/node/4705
What I like about this is that it also adds some expressiveness to some functions.
void foo(int arg)
{
if (unlikely(arg == 0)) {
do_this();
return;
}
do_that();
...
}
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