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When should we use Observer and Observable?
... String: "
+ Integer.toOctalString( subject.getState() ) );
}
}
HexaObserver.java
public class HexaObserver extends Observer{
public HexaObserver(Subject subject){
this.subject = subject;
this.subject.attach(this);
}
@Override
public void update() {
System.out.print...
Text Editor which shows \r\n? [closed]
....e. View, White sapce menu).
It also has an option to display the file in hex mode (i.e. Tools, Hex Dump menu).
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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 ...
构建高并发高可用的电商平台架构实践 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...用性。
3) 依赖关系
平台中各个模块之间的关系尽量是低耦合的，可以通过相关的消息组件进行交互，能异步则异步，分清楚数据流转的主流程和副流程，主副是异步的，比如记录日志可以是异步操作的，增加整个系统的可用...
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?
...
>>> 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
...
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) */
\...