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Is there any way to put malicious code into a regular expression?
...ime–space trade‐off.
With a DFA, you spend more time building it (and allocating more states), whereas with an NFA you spend more time executing it, since it can be multiple states at the same time, and backtracking can eat your lunch — and your CPU.
Denial‐of‐Service Solutions
Probably...
Apache Spark: The number of cores vs. the number of executors
...ably be set to 63 *
1024 = 64512 (megabytes) and 15 respectively. We avoid allocating 100%
of the resources to YARN containers because the node needs some
resources to run the OS and Hadoop daemons. In this case, we leave a
gigabyte and a core for these system processes. Cloudera Manager helps
by ac...
How does an underscore in front of a variable in a cocoa objective-c class work?
...he value to use. This helps keep your used memory low (and also helps with alloc and dealloc of memory, which is important in the absence of 'garbage collection' which you'll find in Java)
– David Sigley
Aug 30 '13 at 13:34
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PHP's array_map including keys
...
Here's my very simple, PHP 5.5-compatible solution:
function array_map_assoc(callable $f, array $a) {
return array_column(array_map($f, array_keys($a), $a), 1, 0);
}
The callable you supply should itself return an array with two values, i.e. r...
Sending multipart/formdata with jQuery.ajax
I've got a problem sending a file to a serverside PHP-script using jQuery's ajax-function.
It's possible to get the File-List with $('#fileinput').attr('files') but how is it possible to send this Data to the server? The resulting array ( $_POST ) on the serverside php-script is 0 ( NULL ) when us...
The character encoding of the HTML document was not declared
...ur HTML tags and doctype go away. You need to include those in your insert.php file:
<!DOCTYPE html PUBLIC"-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" ...
Most efficient way to concatenate strings?
...e expected semantics of a 'string join' operation).
Next, given the total allocation size of the final string, the biggest boost in performance is gained by building the result string in-place. Doing this requires the (perhaps controversial) technique of temporarily suspending the immutability of a...
How can one check to see if a remote file exists using PHP?
...PT_USERAGENT in addition to CURLOPT_NOBODY: davidwalsh.name/set-user-agent-php-curl-spoof
– rlorenzo
Aug 17 '12 at 22:30
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Removing trailing newline character from fgets() input
... helpful answer. Can we use strlen(buffer) when buffer size is dynamically allocated using malloc ?
– rrz0
Nov 10 '18 at 10:16
...
PHP convert XML to JSON
I am trying to convert xml to json in php. If I do a simple convert using simple xml and json_encode none of the attributes in the xml show.
...