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What does map(&:name) mean in Ruby?
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Another cool shorthand, unknown to many, is
array.each(&method(:foo))
which is a shorthand for
array.each { |element| foo(element) }
By calling method(:foo) we took a Method object from self that represents its foo method, and used the & to signify that i...
How to detect if a variable is an array
...andard cross-browser method to determine if a variable in JavaScript is an array or not?
12 Answers
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How to remove specific elements in a numpy array
How can I remove some specific elements from a numpy array? Say I have
10 Answers
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Mockito matcher and array of primitives
...t to verify a specific byte[] you can use AdditionalMatchers.aryEq(expectedArray)
– John Oxley
Jan 30 '13 at 8:35
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Return array in a function
I have an array int arr[5] that is passed to a function fillarr(int arr[]) :
19 Answers
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How to initialize a List to a given size (as opposed to capacity)?
...c list container whose performance is almost identical (see Performance of Arrays vs. Lists question). However they are quite different in initialization.
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Rspec: “array.should == another_array” but without concern for order
I often want to compare arrays and make sure that they contain the same elements, in any order. Is there a concise way to do this in RSpec?
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How to echo or print an array in PHP?
I have this array
11 Answers
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Get all non-unique values (i.e.: duplicate/more than one occurrence) in an array
I need to check a JavaScript array to see if there are any duplicate values. What's the easiest way to do this? I just need to find what the duplicated values are - I don't actually need their indexes or how many times they are duplicated.
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JS: iterating over result of getElementsByClassName using Array.forEach
... all modern browsers (pretty much anything other IE <= 8), you can call Array's forEach method, passing it the list of elements (be it HTMLCollection or NodeList) as the this value:
var els = document.getElementsByClassName("myclass");
Array.prototype.forEach.call(els, function(el) {
// Do ...