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Declaring variables inside loops, good practice or bad practice?
...lsewhere.
Last but not least, some dedicated optimization can be performed more efficiently by the compiler (most importantly register allocation), since it knows that the variable cannot be used outside of the loop. For example, no need to store the result for later re-use.
In short, you are righ...
Best way to structure a tkinter application? [closed]
...r class that calls the GUI is a good idea, in my experience. It offers you more flexibility if both the Tk and Frame objects are attributes of a class which doesn't inherit from anything. This way you can access the Tk and Frame objects more easily (and less ambiguously), and destroying one won't de...
Error java.lang.OutOfMemoryError: GC overhead limit exceeded
...r as follows: "It's just like an 'Out of Java Heap space' error. Give it more memory with -Xmx." ?
– Tim Cooper
Jun 19 '10 at 13:28
61
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How to define a two-dimensional array?
... initialisation to some value is almost always what you want - and this is more often than not 0. range yields an iterable collection - xrange returns a generator. My point was that ademar "corrected" something that was actually more generally correct and efficient than his correction.
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How do I download a binary file over HTTP?
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More platform-specific solutions: GNU/Linux platforms provide wget. OS X provides curl (curl http://oh.no/its/pbjellytime.flv --output secretlylove.flv). Windows has a Powershell equivalent (new-object System.Net.WebClient).D...
How to grep for two words existing on the same line? [duplicate]
...s are pretty much the last place you want to go for clarification. They're more confusing than randomly guessing.
– corsiKa
Jun 25 '11 at 21:45
5
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Java's Virtual Machine and CLR
...use they're already encoded in the instruction), but that means it needs a more complex bytecode format, with more instruction types.
I've been using Java (and admiring the JVM) for about ten years now.
But, in my opinion, the CLR is now the superior implementation, in almost every way.
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How to print a string in fixed width?
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This is far more intuitive and concise than the new str.format. I don't understand why there is this push in python towards convolution
– scottmrogowski
Jun 6 '14 at 0:39
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How to check if a variable is null or empty string or all whitespace in JavaScript?
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A non-jQuery solution that more closely mimics IsNullOrWhiteSpace, but to detect null, empty or all-spaces only:
function isEmptyOrSpaces(str){
return str === null || str.match(/^ *$/) !== null;
}
...then:
var addr = ' ';
if(isEmptyOrSpaces(a...
Is recursion ever faster than looping?
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Also, recursion is, in general, the more natural approach in functional languages, and iteration is normally more intuitive in imperative languages. The performance difference is unlikely to be noticeable, so just use whatever feels more natural for that partic...