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How can I check whether an array is null / empty?
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218
There's a key difference between a null array and an empty array. This is a test for null.
in...
What is this 'Lambda' everyone keeps speaking of?
...hat perform much more useful tasks. For example filter:
var numbers = [1, 2, 3, 4];
var even = [];
// keep all even numbers from above array
for (var i=0; i<numbers.length; i++) {
if (numbers[i] % 2 === 0) {
even.push(numbers[i]);
}
}
alert(even);
// Using the filter method...
Is an array name a pointer?
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262
An array is an array and a pointer is a pointer, but in most cases array names are converted t...
OSX - How to auto Close Terminal window after the “exit” command executed.
...Sandy Chapman
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answered Jul 28 '13 at 16:38
DukeDuke
2,37111 gold badge1313...
How can I use getSystemService in a non-activity class (LocationManager)?
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286
You need to pass your context to your fyl class..
One solution is make a constructor like this...
What blocks Ruby, Python to get Javascript V8 speed? [closed]
...ers).
Lars Bak, the lead developer, has been literally working on VMs for 25 years (and all of those VMs have lead up to V8), which is basically his entire (professional) life. Some of the people writing Ruby VMs aren't even 25 years old.
Are there any Ruby / Python features that are blocking i...
Efficient way to remove keys with empty strings from a dict
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Python 2.X
dict((k, v) for k, v in metadata.iteritems() if v)
Python 2.7 - 3.X
{k: v for k, v in metadata.items() if v is not None}
Note that all of your keys have values. It's just that some of those values are the empty s...
Is there a Pattern Matching Utility like GREP in Windows?
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32 Answers
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How can I pretty-print JSON in a shell script?
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