PYTHON array_fill

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Python replacement for PHP's array_fill [ edit | history ]
[value] * num


Warning, when value is a mutable object (almost everything else than numbers, strings, tuples, frozensets), the value is not copied but a pointer to the same value is created. Thus means that when you want to edit one, every are (it's logical):

a = [[1,2,3]] * 3
print(a) # Output [[1, 2, 3], [1, 2, 3], [1, 2, 3]]
a[0][1] = 5
print(a) # Output [[1, 5, 3], [1, 5, 3], [1, 5, 3]]


If you don't want this to happen, you can use generators (search on the net for more informations) :
a = [[1, 2, 3] for i in range(3)]
print(a) # Output [[1, 2, 3], [1, 2, 3], [1, 2, 3]]
a[0][1] = 5
print(a) # Output [[1, 5, 3], [1, 2, 3], [1, 2, 3]]

PHP array_fill

PHP original manual for array_fill [ show | php.net ]

array_fill

(PHP 4 >= 4.2.0, PHP 5)

array_fillFill an array with values

Description

array array_fill ( int $start_index , int $num , mixed $value )

Fills an array with num entries of the value of the value parameter, keys starting at the start_index parameter.

Parameters

start_index

The first index of the returned array

num

Number of elements to insert

value

Value to use for filling

Return Values

Returns the filled array

Errors/Exceptions

Throws a E_WARNING if num is less than one.

Examples

Example #1 array_fill() example

<?php
$a 
array_fill(56'banana');
$b array_fill(-22'pear');
print_r($a);
print_r($b);
?>

The above example will output:

Array
(
    [5]  => banana
    [6]  => banana
    [7]  => banana
    [8]  => banana
    [9]  => banana
    [10] => banana
)
Array
(
    [-2] => pear
    [0] => pear
)

Notes

See also the Arrays section of manual for a detailed explanation of negative keys.

See Also