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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...
Render HTML to PDF in Django site
...After publish you can invoke the rest api to get the results.
Here is the test of the functionality:
from django.test import TestCase
from x_reports_jasper.models import JasperServerClient
"""
to try integraction with jasper server through rest
"""
class TestJasperServerClient(TestCase):
...
Get button click inside UITableViewCell
...custom cell and table view controller. And make sure table view controller confirms to this protocol.
In custom cell create two properties :
@property (weak, nonatomic) id<CellDelegate>delegate;
@property (assign, nonatomic) NSInteger cellIndex;
In UIButton IBAction delegate click : (Sam...
What is the zero for string?
...ints "true"
A string cannot be nil (but a *string can).
You can simply test
if stringId=="" {
To pass a zero string in stringID, use
k := NewKey(c, "kind", "", 0, p)
From the specification :
When memory is allocated to store a value, either through a
declaration or a call of make or ...
Why switch is faster than if
... between JVM's LookupSwitch and TableSwitch?
So as far as which one is fastest, use this approach:
If you have 3 or more cases whose values are consecutive or nearly consecutive, always use a switch.
If you have 2 cases, use an if statement.
For any other situation, switch is most likely faster, ...
Is False == 0 and True == 1 an implementation detail or is it guaranteed by the language?
...
I just noticed another official confirmation of the fact that True can in practice be considered like 1 and False 0: docs.python.org/2/library/stdtypes.html#boolean-values. I'm adding this to this answer.
– Eric O Lebigot
...
JSON.net: how to deserialize without using the default constructor?
...; method.Invoke(null, a);
}
}
I'm using it like this.
public struct Test {
public readonly int A;
public readonly string B;
public Test(int a, string b) {
A = a;
B = b;
}
}
var json = JsonConvert.SerializeObject(new Test(1, "Test"), new JsonSerializerSettings {
ContractRes...
Optimise PostgreSQL for fast testing
...
First, always use the latest version of PostgreSQL. Performance improvements are always coming, so you're probably wasting your time if you're tuning an old version. For example, PostgreSQL 9.2 significantly improves the speed of TRUNCATE and of cou...
Check whether a variable is a string in Ruby
...
In addition to the other answers, Class defines the method === to test whether an object is an instance of that class.
o.class class of o.
o.instance_of? c determines whether o.class == c
o.is_a? c Is o an instance of c or any of it's subclasses?
o.kind_of? c synonym for *is_a?*
c === o f...
Is there an MD5 Fixed Point where md5(x) == x?
...
Not sure you using the md5sum correct then. You can also confirm it online here: onlinemd5.com
– Thomas Egense
Apr 26 at 17:03
...