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How to get line count of a large file cheaply in Python?
...trategy seems to be the fastest for Windows/Python 2.6
Here is the code:
from __future__ import with_statement
import time
import mmap
import random
from collections import defaultdict
def mapcount(filename):
f = open(filename, "r+")
buf = mmap.mmap(f.fileno(), 0)
lines = 0
readli...
How do I check/uncheck all checkboxes with a button using jQuery?
...ecking/unchecking the parent checkbox all the child checkboxes are getting selected/deselected also with the text of parent checkbox getting changed to checkall/uncheckall.
...
Can a shell script set environment variables of the calling shell? [duplicate]
...d
ln -s setit setit-csh
Now either directly or in an alias, you do this from sh
eval `setit-sh`
or this from csh
eval `setit-csh`
setit uses $0 to determine its output style.
This is reminescent of how people use to get the TERM environment variable set.
The advantage here is that setit i...
Swift: #warning equivalent
...de-project/
http://jeffreysambells.com/2013/01/31/generate-xcode-warnings-from-todo-comments
EDIT: 18/11/14
@david-h raised a good point in his comment. If you wanted to only raise these warnings in a specific build configuration, you could do the following:
if [ "${CONFIGURATION}" = "Debug" ]; ...
ERROR:'keytool' is not recognized as an internal or external command, operable program or batch file
When i use the command
26 Answers
26
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Setting PATH environment variable in OSX permanently
...d the answer for the reference added which explains how to remove elements from path (in the comments) too.
– Amudhan
Dec 14 '15 at 10:03
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How to export a Vagrant virtual machine to transfer it
...his, I'll call it dirty way and clean way:
1. The dirty way
Create a box from your current virtual environment, using vagrant package command:
http://docs.vagrantup.com/v2/cli/package.html
Then copy the box to the other pc, add it using vagrant box add and run it using vagrant up as usual.
Keep...
Are there any worse sorting algorithms than Bogosort (a.k.a Monkey Sort)? [closed]
...
From David Morgan-Mar's Esoteric Algorithms page: Intelligent Design Sort
Introduction
Intelligent design sort is a sorting algorithm based on the theory of
intelligent design.
Algorithm Description
The p...
Performance of Java matrix math libraries? [closed]
...d of course write your own native library with those optimisations to call from Java).
So what does all this mean? Well:
in principle, it is worth hunting around for a better-performing library, though unfortunately I can't recomend one
if performance is really critical to you, I would consider j...
Print newline in PHP in single quotes
I try to use single quotes as much as possible and I've noticed that I can't use \n in single quotes. I know I can just enter a newline literally by pressing return, but that screws up the indentation of my code.
...