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Current time formatting with Javascript
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Can I extend a class using more than 1 class in PHP?
...user_func_array(array($extender, $name), $params);
}
}
}
}
$foo = new Extendable();
$foo->addExtender(new OtherClass());
$foo->other_class_method();
Note that in this model "OtherClass" gets to 'know' about $foo. OtherClass needs to have a public function called "setExtendee"...
How to check if a map contains a key in Go?
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One line answer:
if val, ok := dict["foo"]; ok {
//do something here
}
Explanation:
if statements in Go can include both a condition and an initialization statement. The example above uses both:
initializes two variables - val will receive either the va...
What is the difference between `let` and `var` in swift?
...constant it's not much of one. This works just fine in the compiler: let foo = [1,2,3]; foo[2] = 5; println("(foo)") // [1, 2, 5]
– Kevin Frost
Jun 11 '14 at 20:47
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What is a NullReferenceException, and how do I fix it?
...bers (such as methods) through a null reference. The simplest case:
string foo = null;
foo.ToUpper();
This will throw a NullReferenceException at the second line because you can't call the instance method ToUpper() on a string reference pointing to null.
Debugging
How do you find the source of a Nu...
How to create a directory using Ansible
...ound that it changes child files permissions also... almost like mkdir -p /foo/bar && chmod -R 0775 /foo/bar.. has anyone else observed this with Ansible 2.0.0.2
– ThePracticalOne
May 11 '16 at 14:04
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Access parent URL from iframe
...ggestion. For those who are writing the parent html iframe code this would foot the bill. We used something very similar in our pixel software.
– Ligemer
Nov 25 '14 at 0:30
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Is there a “not equal” operator in Python?
How would you say does not equal?
9 Answers
9
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When is del useful in python?
...ly, using del on a local variable makes the intent clearer. Compare:
del foo
to
foo = None
I know in the case of del foo that the intent is to remove the variable from scope. It's not clear that foo = None is doing that. If somebody just assigned foo = None I might think it was dead code. But...
How do I get jQuery to select elements with a . (period) in their ID?
...id selector if the id contains spaces. Use an attribute selector:
$('[id=foo bar]').show();
If possible, specify element type as well:
$('div[id=foo bar]').show();
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