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How to declare an array in Python?
How do I declare an array in Python ?
16 Answers
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Why use the params keyword?
...ithout params, you can’t.
Additionally, you can call the method with an array as a parameter in both cases:
addTwoEach(new int[] { 1, 2, 3, 4, 5 });
That is, params allows you to use a shortcut when calling the method.
Unrelated, you can drastically shorten your method:
public static int add...
What's quicker and better to determine if an array key exists in PHP?
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isset() is faster, but it's not the same as array_key_exists().
array_key_exists() purely checks if the key exists, even if the value is NULL.
Whereas
isset() will return false if the key exist and value is NULL.
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Facebook Graph API, how to get users email?
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Nevermind, I figured it out: $facebook->getLoginUrl(array('req_perms' => 'email'))
– kylex
Aug 31 '10 at 18:10
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Getting the array length of a 2D array in Java
I need to get the length of a 2D array for both the row and column. I’ve successfully done this, using the following code:
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Find integer index of rows with NaN in pandas dataframe
...9 -0.686914 0.131185
In [10]: pd.isnull(df).any(1).nonzero()[0]
Out[10]: array([3, 6])
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PHP - Get key name of array value
I have an array as the following:
9 Answers
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Correct way to write loops for promise.
...s, which offers two simple solutions :
parallel asynchronous calls using Array.prototype.map()
serial asynchronous calls using Array.prototype.reduce().
The parallel approach will (straightforwardly) give the issue that you are trying to avoid - that the order of the responses is uncertain. The...
Returning first x items from array
I want to return first 5 items from array. How can I do this?
5 Answers
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How to tell if a JavaScript function is defined
...ld be using typeof(Function()) because Function is a function; but so are Array, Object, and other built-in prototypes (for lack of a better term). If you were checking for an array you wouldn't use typeof(array) === typeof(Array) for example; you'd use typeof(array) === typeof(Array()) because you...