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isset() and empty() - what to use
...t set.
Regarding isset
PHP Manual says
isset() will return FALSE if testing a variable that has been set to NULL
Your code would be fine as:
<?php
$var = '23';
if (!empty($var)){
echo 'not empty';
}else{
echo 'is not set or empty';
}
?>
For examp...
What is the fastest integer division supporting division by zero no matter what the result is?
...
The compiler basically recognizes that it can use a condition flag of the test in the addition.
As per request the assembly:
.globl f
.type f, @function
f:
pushl %ebp
xorl %eax, %eax
movl %esp, %ebp
movl 12(%ebp), %edx
testl %edx, %edx
sete %al
ad...
Github: Can I see the number of downloads for a repo?
...zip downloads. Only the git clone instances. Check with GitHub support for confirmation.
– VonC
Dec 29 '15 at 7:59
@da...
How can I pretty-print JSON using node.js?
...your filesystem with fs. Example:
var fs = require('fs');
fs.writeFile('test.json', JSON.stringify({ a:1, b:2, c:3 }, null, 4));
/* test.json:
{
"a": 1,
"b": 2,
"c": 3,
}
*/
See the JSON.stringify() docs at MDN, Node fs docs
...
How to change max_allowed_packet size
...f the file first so it did not work.
6) Control + O (save) then ENTER (confirm) then Control + X (exit file)
7) service mysqld restart
8) You can check the change in the variables section on phpmyadmin
share
|...
Cannot import the keyfile 'blah.pfx' - error 'The keyfile may be password protected'
...moved the certificate, reinstalled it and then sn -i... worked. Basically confirming that for me, both steps were required. Reinstall cert then execute the sn command.
– Dodgyrabbit
Jun 16 '10 at 17:29
...
Creating .pem file for APNS?
...ing set of instructions I've come across. It's straight forward and I can confirm it works brilliantly on both a linux php server and a windows php server.
You can find their 5-step pem creation process right at the bottom of the page.
...
Reload django object from database
...
As of Django 1.8 refreshing objects is built in. Link to docs.
def test_update_result(self):
obj = MyModel.objects.create(val=1)
MyModel.objects.filter(pk=obj.pk).update(val=F('val') + 1)
# At this point obj.val is still 1, but the value in the database
# was updated to 2. Th...
What is the difference between IEqualityComparer and IEquatable?
...EqualityComparer<T>,
one could ask:
Is there a preferred way of testing two instances of T for equality, or are there several equally valid ways?
If there is only one way of testing two instances of T for equality, or if one of several methods is preferred, then IEquatable<T> wou...
What are carriage return, linefeed, and form feed?
...
I can confirm that OS X uses NL as a line terminator, just like Unix (because OS X is a Unix). CR was used in Mac OS 9 and below.
– Rory O'Kane
Aug 16 '13 at 15:51
...