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Using scanf() in C++ programs is faster than using cin?
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Here's a quick test of a simple case: a program to read a list of numbers from standard input and XOR all of the numbers.
iostream version:
#include <iostream>
int main(int argc, char **argv) {
int parity = 0;
int x;
while (std::cin >> x)
parity ^= x;
std::cout <<...
What is the difference between require() and library()?
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The other reason I use require is that it keeps me from referring to packages as libraries, a practice that drives the R-cognoscenti up the wall. The library is the directory location where the packages sit.
– IRTFM
Apr 8 '11 at 15:53
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git rebase: “error: cannot stat 'file': Permission denied”
...s error on Windows and what it seems to mean is that something blocked git from modifying a file at the moment when it tried to a apply a patch.
Windows tends to give processes exclusive access to files when it shouldn't really be necessary, in the past virus checkers have been one source of suspic...
Is it possible to add dynamically named properties to JavaScript object?
... @Qantas: Let's say it doesn't answer it directly. But going from data["PropertyD"] to data[function_to_get_property_name()] seems trivial.
– Georg Schölly
Feb 24 '14 at 10:17
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How to run multiple shells on Emacs
I am using Emacs 23.3.1 on windows 7. I know that I can run shell from emacs using M-x shell. I would like to have multiple shell windows in the same time, but typing M-x shell a second time just opens me the same shell window.
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Using wget to recursively fetch a directory with arbitrary files in it
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Here's the complete wget command that worked for me to download files from a server's directory (ignoring robots.txt):
wget -e robots=off --cut-dirs=3 --user-agent=Mozilla/5.0 --reject="index.html*" --no-parent --recursive --relative --level=1 --no-directories http://www.example.com/archive/ex...
Isn't “package private” member access synonymous with the default (no-modifier) access?
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From Java Language Spec
6.6.5 Example: Default-Access Fields, Methods, and Constructors If
none of the access modifiers public,
protected, or private are specified, a
class member or constructor is
accessible t...
Why do I get “unresolved external symbol” errors when using templates? [duplicate]
...this isn't supported
by a lot of compilers. (Update: this has been removed from the standard as of C++11.)
Both 1 and 2 basically address the problem by giving the compiler access to the full code for the templated function when it is attempting to build the typed function in the program source.
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Best way to change the background color for an NSView
... I tried NSRectFill but the transparency didn't work. I'm coming to Cocoa from Cocoa Touch, and surprised to see that in some ways the Cocoa Touch framework is more complete (!). I was thinking of making a class extension for NSView that would allow you to set backgroundColor like you can an NSWin...
How to install lxml on Ubuntu
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Well that's bad news. I've gained over 1000 rep from this question, if they have fixed that it will stop getting views ... ????
– Eric Wilson
Jul 1 '15 at 9:43
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