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How can I check whether an array is null / empty?
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13 Answers
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What is the difference between substr and substring?
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@Pawel also when you want it to the end of the string (no second argument)
– André Chalella
Oct 20 '...
Ruby: What is the easiest way to remove the first element from an array?
...ther answer.
– Jay
Oct 15 '15 at 21:37
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Most efficient way to prepend a value to an array
...-O but certainly using the unshift method is more concise:
var a = [1, 2, 3, 4];
a.unshift(0);
a; // => [0, 1, 2, 3, 4]
[Edit]
This jsPerf benchmark shows that unshift is decently faster in at least a couple of browsers, regardless of possibly different big-O performance if you are ok with mo...
What is the difference between int, Int16, Int32 and Int64?
What is the difference between int , System.Int16 , System.Int32 and System.Int64 other than their sizes?
10 Answers
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What is the difference between HashSet and List?
...and hashSet2
//returns a list of distinct items in both sets
HashSet set3 = set1.Union( set2 );
flies in comparison with an equivalent operation using LINQ. It's also neater to write!
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How do I run multiple background commands in bash in a single line?
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Exactly how do you want them to run? If you want them to be started in the background and run ...
How to copy a dictionary and only edit the copy
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Python never implicitly copies objects. When you set dict2 = dict1, you are making them refer t...
Unpacking, extended unpacking and nested extended unpacking
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3 Answers
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How do I get whole and fractional parts from double in JSP/Java?
...I get whole and fractional parts from double in JSP/Java ? If the value is 3.25 then I want to get fractional =.25 , whole = 3
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