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Django set default form values
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And how is that variable initial passed to the actual form? In the actual form model, do we have to write as a parameter/argument?
– mgPePe
May 4 '11 at 12:03
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Abstract Class vs Interface in C++ [duplicate]
... about C++. As you know, there is no clear distinction between interface and abstract class in C++ unlike Java and C#. When would it be more preferrable to use an interface instead of an abstract class in C++? Could you give some examples?
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Java Enum Methods - return opposite direction enum
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how do you use it, though? and what is this technique called?
– Thufir
Jul 7 '14 at 6:46
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Python: using a recursive algorithm as a generator
...pens that, even for relatively small input, the sequences are several thousands, thus I would prefer to use my algorithm as a generator instead of using it to fill a list with all the sequences.
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Why do I need to override the equals and hashCode methods in Java?
...n conjunction with all hash-based collections, including HashMap, HashSet, and Hashtable.
Let's try to understand it with an example of what would happen if we override equals() without overriding hashCode() and attempt to use a Map.
Say we have a class like this and that two objects of MyClass are...
Using sed, how do you print the first 'N' characters of a line?
...e first 100 characters:
cat file |colrm 101
It's been around for years and is in most linux's and bsd's (freebsd for sure), usually by default. I can't remember ever having to type apt-get install colrm.
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How to change color in circular progress bar?
I am using circular progress bar on Android. I wish to change the color of this. I am using
22 Answers
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Ternary Operators in JavaScript Without an “Else”
...ested expressions if that is fitting)
each part of the expression (after ? and after : ) should return a value without side effects (the expression x = true returns true as all expressions return the last value, but also changes x without x having any effect on the returned value)
In short - the '...
Django: accessing session variables from within a template?
...ke any other, so you just use the normal template mechanism for attributes and members:
{{ request.session.name }}
Don't forget to pass the request into the template context, or even better ensure you are using RequestContext and have the request context processor enabled. See the documentation.
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Find intersection of two nested lists?
... sublist in c2]
Explanation:
The filter part takes each sublist's item and checks to see if it is in the source list c1.
The list comprehension is executed for each sublist in c2.
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