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select count(*) from table of mysql in php
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Please start using PDO.
mysql_* is deprecated as of PHP 5.5.0 and will be removed entirely in 7. Let's make it easier to upgrade and start using it now.
$dbh = new \PDO($dsn, $user, $password);
$sth = $dbh->prepare('SELECT co...
How is the Linux kernel tested ?
...giU
Step debuggers
Not really unit testing, but may help once your tests start failing:
QEMU + GDB: https://stackoverflow.com/a/42316607/895245
KGDB: https://stackoverflow.com/a/44226360/895245
My own QEMU + Buildroot + Python setup
I also started a setup focused on ease of development, but I...
node.js fs.readdir recursive directory search
...of the loop completes in order. In a parallel loop, all the iterations are started at the same time, and one may complete before another, however, it is much faster than a serial loop. So in this case, it's probably better to use a parallel loop because it doesn't matter what order the walk complete...
How to get the number of days of difference between two dates on mysql?
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SELECT md.*, DATEDIFF(md.end_date, md.start_date) AS days FROM membership_dates md
output::
id entity_id start_date end_date days
1 1236 2018-01-16 00:00:00 2018-08-31 00:00:00 227
2 2876 2015-06-26 00:00:00 ...
How are people unit testing with Entity Framework 6, should you bother?
I am just starting out with Unit testings and TDD in general. I have dabbled before but now I am determined to add it to my workflow and write better software.
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What is token-based authentication?
...ith a single way of authenticating those
calls.
Mobile ready: when you start working on a native platform (iOS, Android, Windows 8, etc.) cookies are not ideal when consuming a
token-based approach simplifies this a lot.
CSRF: since you are not relying on cookies, you don't need to prote...
What columns generally make good indexes?
...hen that's bad index.
Likely in any book, "Index Page" could have chapter start page, topic page number starts, also sub topic page starts. Some clarification in Index page helps but more detailed index might confuse you or scare you. Indexes are also having memory.
Index selection should be wise...
android webview geolocation
...;
private int webViewPreviousState;
private final int PAGE_STARTED = 0x1;
private final int PAGE_REDIRECTED = 0x2;
private CoordinatorLayout rootView;
private WebView webView;
@Override
protected void onCreate(Bundle savedInstanceState) {
...
When should assertions stay in production code? [closed]
...al problem is not structuring the program to let subsystems crash and be restarted by a watchdog.
– Rob
Jun 9 '14 at 18:50
5
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How to learn R as a programming language [closed]
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For starters, you might want to look at this article by John Cook. Also make sure that you read "The R Inferno".
There are many good resources on the R homepage, but in particular, read "An Introduction to R" and "The R Languag...