大约有 5,100 项符合查询结果（耗时：0.0190秒） [XML]
Why do you have to link the math library in C?
...ven have a floating point math library available!
Even on the first 68000 machines (Mac, Atari ST, Amiga), floating point coprocessors were often expensive add-ons.
To do all that floating point math, you needed a pretty sizable library. And the math was going to be slow. So you rarely used floats...
How do I make this file.sh executable via double click?
First off I'm using Mac.
5 Answers
5
...
NSOperation vs Grand Central Dispatch
...ere I noticed overhead from using NSOperations, and I've seen this on both Mac and iOS.
Second, there's an elegance to block-based dispatch code that is hard to match when using NSOperations. It's so incredibly convenient to wrap a few lines of code in a block and dispatch it to be performed on a s...
How do I use vi keys in ipython under *nix?
...
You can also interactively switch between Vi-mode and Emacs mode. According to the the readline docs to switch between them you are supposed to be able to use the M-C-j key combination but that only seems to allow me to switch to vi-mode - on my Mac (where ESC is used as the 'Met...
多媒体组件 · App Inventor 2 中文网
...= new QRCode("qrcode", { text: window.location.href + "?f=share", //URL地址 width: 150, height: 150, colorDark: '#000000', //二维码颜色 colorLight: "#ffffff" //背景颜色}); App Inventor 2 中文网 © 2023 - document.write(new Date().getFullYear()); 跟着...
How to write to a file in Scala?
...ing, not to force everyone to specify it all the time. But if you're on a Mac and your files written by Java are gobbledygook because they aren't Mac OS Roman encoded, I'm not sure it's doing more good than harm. I think it's the platforms' fault that they haven't agreed on a charset. As an indiv...
Is it bad to have my virtualenv directory inside my git repository?
...
If you, say pip install mysql-python, on a 64 bit machine, and then someone with a 32 bit machine tries to use it, it will not work. It uses a C module, like many Python modules do, to increase performance. I imagine Windows->Linux would also not work.
...
Match whitespace but not newlines
... both \r and \n in the pattern correctly handles all of Unix (LF), classic Mac OS (CR), and DOS-ish (CR LF) newline conventions.
No need to take my word for it:
#! /usr/bin/env perl
use strict;
use warnings;
use 5.005; # for qr//
my $ws_not_crlf = qr/[^\S\r\n]/;
for (' ', '\f', '\t', '\r', ...
Match linebreaks - \n or \r\n?
... \r?
Long story short, Linux uses \n for a new-line, Windows \r\n and old Macs \r. So there are multiple ways to write a newline. Your second tool (RegExr) does for example match on the single \r.
1) [\r\n]+ as Ilya suggested will work, but will also match multiple consecutive new-lines. (\r\n|\r|...
How to find the nearest parent of a Git branch?
... think you can make it one line instead of 2, and possibly make it work on Mac as ack is not available on Mac (somebody suggested replacing ack with grep)
– nonopolarity
Apr 18 '14 at 17:19
...