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How do I check if file exists in Makefile so I can delete it?
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The second top answer mentions ifeq, however, it fails to mention that these must be on the same level as the name of the target, e.g., to download a file only if it doesn't currently exist, the following code could be used:
download:
ifeq (,$(wil...
How to replace strings containing slashes with sed?
...sh in cases where you don't know what characters might occur in the replacement strings (if they are shell variables, for example).
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How to get the size of a JavaScript object?
...de in my original answer. I have removed the recursion and removed the assumed existence overhead.
function roughSizeOfObject( object ) {
var objectList = [];
var stack = [ object ];
var bytes = 0;
while ( stack.length ) {
var value = stack.pop();
if ( typeof valu...
Is there a concurrent List in Java's JDK?
How can I create a concurrent List instance, where I can access elements by index? Does the JDK have any classes or factory methods I can use?
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Require either of two arguments using argparse
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I think you are searching for something like mutual exclusion (at least for the second part of your question).
This way, only foo or bar will be accepted, not both.
import argparse
parser = argparse.ArgumentParser()
group = parser.add_mutual...
Array versus linked-list
Why would someone want to use a linked-list over an array?
34 Answers
34
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How do I log a Python error with debug information?
I am printing Python exception messages to a log file with logging.error :
12 Answers
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How do you receive a url parameter with a spring controller mapping
...'m calling my Spring controller mapping with jquery ajax. The value for someAttr is always empty string regardless of the value in the url. Please help me determine why.
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How to Flatten a Multidimensional Array?
Is it possible, in PHP, to flatten a (bi/multi)dimensional array without using recursion or references?
29 Answers
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Can regular expressions be used to match nested patterns? [duplicate]
...xpression that matches a nested pattern that occurs an unknown number of times? For example, can a regular expression match an opening and closing brace when there are an unknown number of open/close braces nested within the outer braces?
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