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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...
Performance differences between debug and release builds
...g optimized code so difficult. And giving the volatile keyword a meaning.
Array index checking elimination. An important optimization when working with arrays (all .NET collection classes use an array internally). When the JIT compiler can verify that a loop never indexes an array out of bounds t...
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
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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...
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...
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 do I store an array in localStorage? [duplicate]
...
@Howdy_McGee As localStorage only supports strings, arrays must be converted to a string format. The best way to do this is to convert it into a JSON array as it is easy to convert between the two states (JSON is just a long piece of string data). You may want to read up on JS...
Can I pass an array as arguments to a method with variable arguments in Java?
... variable arity parameter will be evaluated and the results stored into an array that will be passed to the method invocation.
Here's an example to illustrate:
public static String ezFormat(Object... args) {
String format = new String(new char[args.length])
.replace("\0", "[ %s ]");
...
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
...