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“unmappable character for encoding” warning in Java
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快速理解 高频对冲套利自动交易（程式化交易） - 更多技术 - 清泛网 - 专注...
...样一件事，不断的开仓、平仓、再开仓、再平仓。。。
2、何谓：对冲？在做空制度下，同时，持有空单和多单，以此将市场暴涨暴跌对账户的冲击降低到可接受范围；
3、何谓：套利？在狭义上，分跨期套利、跨品种套利，目...
Remove everything after a certain character
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var s = '/Controller/Action?id=11112&value=4444';
s = s.substring(0, s.indexOf('?'));
document.write(s);
Sample here
I should also mention that native string functions are much faster than regular expressions, which should only really be used when neces...
NSLog the method name with Objective-C in iPhone
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263
print(__FUNCTION__) // Swift
NSLog(@"%@", NSStringFromSelector(_cmd)); // Objective-C
Swift ...
Can the Unix list command 'ls' output numerical chmod permissions?
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it almost can ..
ls -l | awk '{k=0;for(i=0;i<=8;i++)k+=((substr($1,i+2,1)~/[rwx]/) \
*2^(8-i));if(k)printf("%0o ",k);print}'
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When should I use a table variable vs temporary table in sql server?
...y table. The details of this are version dependant however. For SQL Server 2012 and below the only indexes that could be created on table variables were those implicitly created through a UNIQUE or PRIMARY KEY constraint. SQL Server 2014 introduced inline index syntax for a subset of the options ava...
Can't pickle when using multiprocessing Pool.map()
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LINQ's Distinct() on a particular property
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