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Database development mistakes made by application developers [closed]
...any developers forget this and start treating a "means" as an "end". Unit testing is a prime example of this.
I once worked on a system that had a huge hierarchy for clients that went something like:
Licensee -> Dealer Group -> Company -> Practice -> ...
such that you had to join a...
Parse DateTime string in JavaScript
...
That doesn't test for valid dates at all, it just tests if the Date constructor can make a valid date from the input. The two aren't the same thing.
– RobG
Mar 17 '16 at 23:01
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is_file or file_exists in PHP
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is_file() is the fastest, but recent benchmark shows that file_exists() is slightly faster for me. So I guess it depends on the server.
My test benchmark:
benchmark('is_file');
benchmark('file_exists');
benchmark('is_readable');
function be...
in_array multiple values
...bar');
// Evaluation Function - we pass guard and target array
$b=true;
$test = function($x) use (&$b, $b1) {
if (!in_array($x,$b1)) {
$b=false;
}
};
// Actual Test on array (can be repeated with others, but guard
// needs to be initialized again, due to by r...
Count(*) vs Count(1) - SQL Server
...too.
SYS_GUID() in Oracle is quite computation intensive function.
In my test database, t_even is a table with 1,000,000 rows
This query:
SELECT COUNT(SYS_GUID())
FROM t_even
runs for 48 seconds, since the function needs to evaluate each SYS_GUID() returned to make sure it's not a NULL.
H...
Including a .js file within a .js file [duplicate]
...gt;
var x = document.createElement('script');
x.src = 'http://example.com/test.js';
document.getElementsByTagName("head")[0].appendChild(x);
You may also use onload event to each script you attach, but please test it out, I am not so sure it works cross-browser or not.
x.onload=callback_function...
PHP mail function doesn't complete sending of e-mail
...subject, $message, $headers); // $recipient should be $to
Another way to test this is to hard code the recipient value into the mail() function call:
mail('user@example.com', $subject, $message, $headers);
This can apply to all of the mail() parameters.
Send to multiple accounts
To help rule...
Disable Interpolation when Scaling a
...han pre-scaling and pretty widely-supported).
Live Demo
If you'd like to test the CSS properties discussed in the MDN article on canvas elements, I've made this fiddle which should display something like this, blurry or not, depending on your browser:
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How can I parse a YAML file from a Linux shell script?
...ion
Example's YAML file (with complex features):
$ cat <<EOF > test.yaml
name: "MyName !!"
subvalue:
how-much: 1.1
things:
- first
- second
- third
other-things: [a, b, c]
maintainer: "Valentin Lab"
description: |
Multiline description:...
Case statement with multiple values in each 'when' block
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@FurkanAyhan That's odd. I went ahead and tested the code just to make sure and it does work. My guess is there's something else going on in your code that's making it error like that. Is it possible you forgot to close out a string somewhere or something like that?
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