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Execution time of C program
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CLOCKS_PER_SEC is a constant which is declared in <time.h>. To get the CPU time used by a task within a C application, use:
clock_t begin = clock();
/* here, do your time-consuming job */
clock_t end = clock();
double time_spent = ...
How to fetch FetchType.LAZY associations with JPA and Hibernate in a Spring Controller
...cit call on the lazy collection in order to initialize it (common practice is to call .size() for this purpose). In Hibernate there is a dedicated method for this (Hibernate.initialize()), but JPA has no equivalent of that. Of course you will have to make sure that the invocation is done, when the s...
How does delete[] “know” the size of the operand array?
You don't pass the array's boundaries to delete[] . But where is that information stored? Is it standardised?
9 Answers
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Position of least significant bit that is set
... efficient way to determine the position of the least significant bit that is set in an integer, e.g. for 0x0FF0 it would be 4.
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How do I detect unsigned integer multiply overflow?
...ine each time on a , b and ab to check if the digits condition was satisfied.
31 Answers
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Why is #!/usr/bin/env bash superior to #!/bin/bash?
I've seen in a number of places, including recommendations on this site ( What is the preferred Bash shebang? ), to use #!/usr/bin/env bash in preference to #!/bin/bash . I've even seen one enterprising individual suggest using #!/bin/bash was wrong and bash functionality would be lost by doing...
Is it possible to use a div as content for Twitter's Popover
...tions to set the content for a Popover
Use the data-content attribute. This is the default option.
Use a custom JS function which returns the HTML content.
Using data-content:
You need to escape the HTML content, something like this:
<a class='danger' data-placement='above'
data-content=...
How do you remove a specific revision in the git history?
Suppose your git history looks like this:
9 Answers
9
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Differences between C++ string == and compare()?
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This is what the standard has to say about operator==
21.4.8.2 operator==
template<class charT, class traits, class Allocator>
bool operator==(const basic_string<charT,traits,Allocator>& lhs,
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How do I recursively delete a directory and its entire contents (files + sub dirs) in PHP?
... rmdir contains a decent implementation:
function rrmdir($dir) {
if (is_dir($dir)) {
$objects = scandir($dir);
foreach ($objects as $object) {
if ($object != "." && $object != "..") {
if (is_dir($dir. DIRECTORY_SEPARATOR .$object) && !is_link($dir."...