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How to check whether a file or directory exists?
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190
// exists returns whether the given file or directory exists
func exists(path string) (bool, e...
Difference between array_map, array_walk and array_filter
...n. It does preserve the keys.
Example:
<pre>
<?php
$origarray1 = array(2.4, 2.6, 3.5);
$origarray2 = array(2.4, 2.6, 3.5);
print_r(array_map('floor', $origarray1)); // $origarray1 stays the same
// changes $origarray2
array_walk($origarray2, function (&$v, $k) { $v = floor($v); }...
What do
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218
These are called generalized type constraints. They allow you, from within a type-parameterized...
C-like structures in Python
...from collections import namedtuple
MyStruct = namedtuple("MyStruct", "field1 field2 field3")
The newly created type can be used like this:
m = MyStruct("foo", "bar", "baz")
You can also use named arguments:
m = MyStruct(field1="foo", field2="bar", field3="baz")
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Best way to get identity of inserted row?
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14 Answers
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Does Java have a HashMap with reverse lookup?
..." format, rather than "key-value". It's like a HashMap, but I will need O(1) lookup in both directions. Is there a name for this type of data structure, and is anything like this included in Java's standard libraries? (or maybe Apache Commons?)
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Reset CSS display property to default value
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157
A browser's default styles are defined in its user agent stylesheet, the sources of which you ...
The difference between try/catch/throw and try/catch(e)/throw e
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151
The constructions
try { ... }
catch () { ... } /* You can even omit the () here */
try { ......
Define make variable at rule execution time
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331
In your example, the TMP variable is set (and the temporary directory created) whenever the rule...