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Correct way to populate an Array with a Range in Ruby
...hrough a book which gives examples of Ranges being converted to equivalent arrays using their "to_a" methods
6 Answers
...
string sanitizer for filename
...ia.org/wiki/Filename#Reserved_characters_and_words
$name = str_replace(array_merge(
array_map('chr', range(0, 31)),
array('<', '>', ':', '"', '/', '\\', '|', '?', '*')
), '', $name);
// maximise filename length to 255 bytes http://serverfault.com/a/9548/44086
$e...
Query for array elements inside JSON type
...
json in Postgres 9.3+
Unnest the JSON array with the function json_array_elements() in a lateral join in the FROM clause and test for its elements:
WITH reports(data) AS (
VALUES ('{"objects":[{"src":"foo.png"}, {"src":"bar.png"}]
, "background":"ba...
Why check both isset() and !empty()
...
Empty just check is the refered variable/array has an value if you check the php doc(empty) you'll see this things are considered emtpy
* "" (an empty string)
* 0 (0 as an integer)
* "0" (0 as a string)
* NULL
* FALSE
* array() (an empty array)
* var $var; (a var...
How to get key names from JSON using jq
...on",
"appname",
"build-date",
"version"
]
UPDATE: To create a BASH array using these keys:
Using BASH 4+:
mapfile -t arr < <(jq -r 'keys[]' ms.json)
On older BASH you can do:
arr=()
while IFS='' read -r line; do
arr+=("$line")
done < <(jq 'keys[]' ms.json)
Then print it...
PHP equivalent of .NET/Java's toString()
...nverted to string. Is there a general solutions that can convert anything (arrays+objects+whatever) to a string?
– ripper234
Jan 3 '13 at 15:42
3
...
Solution for “Fatal error: Maximum function nesting level of '100' reached, aborting!” in PHP
...unction calls, work with a queue model to flatten the structure.
$queue = array('http://example.com/first/url');
while (count($queue)) {
$url = array_shift($queue);
$queue = array_merge($queue, find_urls($url));
}
function find_urls($url)
{
$urls = array();
// Some logic filling ...
How to identify numpy types in python?
... to find out where it was defined:
>>> import numpy as np
a = np.array([1, 2, 3])
>>> type(a)
<type 'numpy.ndarray'>
>>> type(a).__module__
'numpy'
>>> type(a).__module__ == np.__name__
True
...
Why Large Object Heap and why do we care?
...point where copying no longer improves perf. With a special exception for arrays of double, they are considered 'large' when the array has more than 1000 elements. That's another optimization for 32-bit code, the large object heap allocator has the special property that it allocates memory at addr...
What is the difference between char * const and const char *?
...ean separation of declared-variable names and their types (a pointer to an array of pointers to integers would be var foo: ^Array[3..4] of ^Integer;`. That'd be some funny nested parenthesized thing in C, I think.
– supercat
Aug 28 '13 at 18:54
...