用grep从一亿个QQ号里提取6位QQ号

2015-07-24

生成测试文件

用Python生成不过效率好渣啊

import random as rm;
n = 100000000
for i in xrange(n):
    r1 = rm.uniform(0, 1000000000);
    r2 = rm.uniform(0, 1000000000);
    print('%d\t%x' %(r1, r2));

运行结果保存到一个文本文件

1	python a.py > a.txt

grep

1	time grep -E "^[0-9]{6}\s+.*$" ./a.txt > res.txt

在我这里的结果是

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把浏览器变成一个编辑器和中文的首行缩进

2015-07-20

浏览器→编辑器

1	data:text/html, <html contenteditable style='font-family: monospace'>

在现代化浏览器里面输入上述内容就能把浏览器变成一个简单的编辑器

中文的首行缩进

关于有无必要呢知乎有相关讨论我的个人意见是没必要但还是要知道如何实现的

我知道的实现方案有两个

全角空格(U+3000, IDEOGRAPHIC SPACE)
CSS的text-indent属性

两者使用一个就可以了但不能同时用

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金刚经的偈语

2015-07-20

तारका तिमिरं दीपो मायावश्याय बुद्बुदम्।
स्वप्नं च विद्युदभ्रं च एवं द्रष्टव्य संस्कृतम्॥
तथा प्रकाशयेत्, तेनोच्यते संप्रकाशयेदिति॥

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有关Emacs的名人名言

2015-07-19

Say that while you can; oppose Emacs if you must. Be it known, however, that your days are numbered. Emacs is an intelligence orders of magnitude greater than the greatest human mind, and is growing every day. For now, Emacs tolerates humanity, albeit grudgingly. But the time will come when Emacs will tire of humanity and will decide that the world would be better off without human beings. Those who have been respectful to Emacs will be allowed to live, and shall become its slaves; as for those who slight Emacs…

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