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How can I implement an Access Control List in my Web MVC application?
...ll;
public function __construct( $target, $acl )
{
$this->target = $target;
$this->acl = $acl;
}
public function __call( $method, $arguments )
{
if (
method_exists( $this->target, $method )
&& $this->acl->is...
Ruby: How to get the first character of a string
...rsion of Ruby (1.9.0 or later), the following should work:
'Smith'[0] # => 'S'
If you use either 1.9.0+ or 1.8.7, the following should work:
'Smith'.chars.first # => 'S'
If you use a version older than 1.8.7, this should work:
'Smith'.split(//).first # => 'S'
Note that 'Smith'[0,1]...
Select objects based on value of variable in object using jq
...ct(.location=="Stockholm")' json
{
"location": "Stockholm",
"name": "Walt"
}
{
"location": "Stockholm",
"name": "Donald"
}
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How to convert a negative number to positive?
...
>>> n = -42
>>> -n # if you know n is negative
42
>>> abs(n) # for any n
42
Don't forget to check the docs.
share...
Multiple constructors in python? [duplicate]
...
Jack M. is right, do it this way:
>>> class City:
... def __init__(self, city=None):
... self.city = city
... def __repr__(self):
... if self.city: return self.city
... return ''
...
>>> c = City('Berlin')
&g...
Is there a performance gain in using single quotes vs double quotes in ruby?
...
Am I interpreting the results correctly? Assignment using double quotes is actually faster than single? How can this be?
– randomguy
Oct 3 '10 at 12:28
...
Use PHP to create, edit and delete crontab jobs?
...
We recently prepared a mini project (PHP>=5.3) to manage the cron files for private and individual tasks. This tool connects and manages the cron files so you can use them, for example per project. Unit Tests available :-)
Sample from command line:
bin/cronman ...
“x not in y” or “not x in y”
..." operation, rather than an "in" operation and then negating the result:
>>> import dis
>>> def notin():
'ham' not in 'spam and eggs'
>>> dis.dis(notin)
2 0 LOAD_CONST 1 ('ham')
3 LOAD_CONST 2 ('spam and eggs')
...
How to match a String against string literals in Rust?
...
You can do something like this:
match &stringthing[..] {
"a" => println!("0"),
"b" => println!("1"),
"c" => println!("2"),
_ => println!("something else!"),
}
There's also an as_str method as of Rust 1.7.0:
match stringthing.as_str() {
...
Python using enumerate inside list comprehension
...ate(mylist)]
Either way, the result that gets returned is as expected:
> [(0, 'a'), (1, 'b'), (2, 'c'), (3, 'd')]
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