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How to access random item in list?
I have an ArrayList, and I need to be able to click a button and then randomly pick out a string from that list and display it in a messagebox.
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pip install from git repo branch
...ttps://github.com/tangentlabs/django-oscar-paypal.git@issue/34/oscar-0.6
And specify the branch name without the leading /.
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What techniques can be used to define a class in JavaScript, and what are their trade-offs?
...at least a couple of ways to go about doing that. What would be the syntax and why would it be done in that way?
19 Answers...
What's the best name for a non-mutating “add” method on an immutable collection?
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Unless I'm missing it, System.Linq.Enumerable (and Linq in general) only uses Concat() for "sequence + sequence", never "item + sequence". The problem that someone "might expect it to add two lists together rather than adding a single value to the other list" was explici...
Format numbers to strings in Python
... see the note in the docs:
"%02d:%02d:%02d" % (hours, minutes, seconds)
And for your specific case of formatting time, there’s time.strftime:
import time
t = (0, 0, 0, hours, minutes, seconds, 0, 0, 0)
time.strftime('%I:%M:%S %p', t)
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Easy way to see saved NSUserDefaults?
...e:
<Bundle Identifier>.foo.pList
Open this up in the pList editor and browse persisted values to your heart's content.
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What is the purpose of a question mark after a type (for example: int? myVariable)?
...d the values true, false, or
null. The ability to assign null to numeric and Boolean types is
especially useful when you are dealing with databases and other data
types that contain elements that may not be assigned a value. For
example, a Boolean field in a database can store the values tru...
How to determine if a type implements a specific generic interface type
...plements(IBar), or even better, using a keyword "is" .... I'm exploring c# and I'm a more then bit disappointed in .net right now ...
– Sofija
Mar 5 '12 at 22:12
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With arrays, why is it the case that a[5] == 5[a]?
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The C standard defines the [] operator as follows:
a[b] == *(a + b)
Therefore a[5] will evaluate to:
*(a + 5)
and 5[a] will evaluate to:
*(5 + a)
a is a pointer to the first element of the array. a[5] is the value that's 5 el...
Easiest way to flip a boolean value?
... it can be helpful to have a TOGGLE(a) macro. This prevents some mistakes and makes it all more readable on narrow screens.
– OJW
Oct 1 '10 at 12:17
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