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How do I make a checkbox required on an ASP.NET form?
... if (this.ControlToValidate.Length == 0)
throw new System.Web.HttpException(string.Format("The ControlToValidate property of '{0}' is required.", this.ID));
if (this.CheckBoxToValidate == null)
throw new System.Web.HttpException(string.Format("This control can only ...
Convert Python dictionary to JSON array
...eUploader: {
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What is the reason why “synchronized” is not allowed in Java 8 interface methods?
...t seem sensible to extend this semantics to default methods as well; after all, they are instance methods with a receiver too. (Note that synchronized methods are entirely a syntactic optimization; they're not needed, they're just more compact than the corresponding synchronized block. There's a r...
Iterate a list as pair (current, next) in Python
...(b, None)
return itertools.izip(a, b)
How this works:
First, two parallel iterators, a and b are created (the tee() call), both pointing to the first element of the original iterable. The second iterator, b is moved 1 step forward (the next(b, None)) call). At this point a points to s0 and b...
Django: Get model from string?
...d in 1.9) in favor of the the new application loading system.
-- Scott Woodall
Found it. It's defined here:
from django.db.models.loading import get_model
Defined as:
def get_model(self, app_label, model_name, seed_cache=True):
...
List of Big-O for PHP functions
...eUploader: {
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How to count objects in PowerShell?
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Is a Python list guaranteed to have its elements stay in the order they are inserted in?
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In where shall I use isset() and !empty()
... it's not a good idea to use this operator for math in case "0" is accidentally a string. This can be dangerous. Instead, use basic >, < and == operators and convert variables using intval() or floatval().
– kaleazy
Feb 14 at 18:08
...
How do you express binary literals in Python?
... memory.
Note that leading zeros in a non-zero decimal number are not allowed.
This is for disambiguation with C-style octal literals, which Python
used before version 3.0.
Some examples of integer literals:
7 2147483647 0o177 0b100110111
3 7922816251...