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How do I create a dictionary with keys from a list and values defaulting to (say) zero? [duplicate]
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dict((el,0) for el in a) will work well.
Python 2.7 and above also support dict comprehensions. That syntax is {el:0 for el in a}.
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Is mathematics necessary for programming? [closed]
...th a friend during college days whether advanced mathematics is necessary for any veteran programmer. He used to argue fiercely against that. He said that programmers need only basic mathematical knowledge from high school or fresh year college math, no more no less, and that almost all of programmi...
Does Internet Explorer support pushState and replaceState?
Does anybody know if Internet Explorer supports the history.pushState() and history.replaceState() methods for manipulating browser history ? Considering these are just being implemented in Firefox 4, I'm not holding my breath, but does anybody know if they're coming in IE9?
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Convert Python program to C/C++ code? [closed]
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Yes. Look at Cython. It does just that: Converts Python to C for speedups.
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RuntimeWarning: invalid value encountered in divide
I have to make a program using Euler's method for the "ball in a spring" model
4 Answers
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Why does python use 'else' after for and while loops?
I understand how this construct works:
21 Answers
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What is the syntax rule for having trailing commas in tuple definitions?
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In all cases except the empty tuple the comma is the important thing. Parentheses are only required when required for other syntactic reasons: to distinguish a tuple from a set of function arguments, operator precedence, or to allow line breaks.
The trailing comma for tuples, lis...
Javascript object Vs JSON
...ation is where the key contains a special character (if, :, - etc). It is worth noting that a key in JSON must be enclosed in double quotes.
If I convert the above object to JSON using var jSonString = JSON.stringify(testObject);, what is the difference between the 2 (JS obj and JSON)?
JSON is ...
What guarantees are there on the run-time complexity (Big-O) of LINQ methods?
...quite a bit, and I haven't really seen any mention of run-time complexity for any of the LINQ methods. Obviously, there are many factors at play here, so let's restrict the discussion to the plain IEnumerable LINQ-to-Objects provider. Further, let's assume that any Func passed in as a selector /...
What guidelines for HTML email design are there? [closed]
What guidelines can you give for rich HTML formatting in emails while maintaining good visual stability across many clients and web based email interfaces?
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