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What does “dereferencing” a pointer mean?
... a 32-bit pointer at 0x2000, the memory content would be:
Memory Address (hex) Variable name Contents
1000 'a' == 97 (ASCII)
1001 'b' == 98
1002 'c' == 99
1003 ...
2015年硅谷最火的高科技创业公司都有哪些 - 资讯 - 清泛网 - 专注C/C++及内核技术
...近30年的发展，并且可以衍生到很多类似的领域：存储，功耗，带宽，像素。而下面这个是冯诺伊曼，20世纪最重要的数学家之一，在现代计算机、博弈论和核武器等诸多领域内有杰出建树的最伟大的科学全才之一。他提出(技术)...
Emulate ggplot2 default color palette
...of colors. For example, an input of 3 would produce a character vector of HEX colors with these colors:
4 Answers
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How to correct TypeError: Unicode-objects must be encoded before hashing?
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>>> hashlib.sha256(str(random.getrandbits(256)).encode('utf-8')).hexdigest()
'cd183a211ed2434eac4f31b317c573c50e6c24e3a28b82ddcb0bf8bedf387a9f'
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HMAC-SHA1 in bash
...shift 3
echo -n "$data" | openssl dgst "-$digest" -hmac "$key" "$@"
}
# hex output by default
hash_hmac "sha1" "value" "key"
# raw output by adding the "-binary" flag
hash_hmac "sha1" "value" "key" -binary | base64
# other algos also work
hash_hmac "md5" "value" "key"
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ATL正则表达式库使用 - C/C++ - 清泛网 - 专注C/C++及内核技术
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"d([0-9])", // digit
"h([0-9a-fA-F])", // hex digit
"n(\r|(\r?\n))", // newline
"q(\"[^\"]*\")|(\''''[^\'''']*\'''')", // quoted string
"w([a-zA-Z]+)", // simple word
"z([0-9]+)", // integer
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JavaScript string encryption and decryption?
...rs = text => text.split('').map(c => c.charCodeAt(0));
const byteHex = n => ("0" + Number(n).toString(16)).substr(-2);
const applySaltToChar = code => textToChars(salt).reduce((a,b) => a ^ b, code);
return text => text.split('')
.map(textToChars)
.map(a...
What are all the escape characters?
...ces:
\u{0000-FFFF} /* Unicode [Basic Multilingual Plane only, see below] hex value
does not handle unicode values higher than 0xFFFF (65535),
the high surrogate has to be separate: \uD852\uDF62
Four hex characters only (no variable width) */
\...
Elegant way to search for UTF-8 files with BOM?
...nd files (Alt + F7) → file types *.* → Find text "EF BB BF" → check 'Hex' checkbox → search
And you get the list :)
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由12306.cn谈谈网站性能技术 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...把图标也打成一个文件，用css分块展示。把链接数减到最低。
三、减少网页大小增加带宽
这个世界不是哪个公司都敢做图片服务的，因为图片太耗带宽了。现在宽带时代很难有人能体会到当拨号时代做个图页都不敢用图片的...