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What is the difference between gsub and sub methods for Ruby Strings
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209
The g stands for global, as in replace globally (all):
In irb:
>> "hello".sub('l', '*')...
Get selected subcommand with argparse
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edited Jun 6 '14 at 14:01
Pigueiras
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answered ...
How to parse XML to R data frame
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103
Data in XML format are rarely organized in a way that would allow the xmlToDataFrame function t...
Random Number Between 2 Double Numbers
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Yes.
Random.NextDouble returns a double between 0 and 1. You then multiply that by the range you need to go into (difference between maximum and minimum) and then add that to the base (minimum).
public double GetRandomNumber(double minimum, double maximum)
{
Random ...
Why are my basic Heroku apps taking two seconds to load?
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edited Jan 20 '18 at 22:03
Tomáš Hübelbauer
4,13844 gold badges4242 silver badges7474 bronze badges
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What is the relationship between UIView's setNeedsLayout, layoutIfNeeded and layoutSubviews?
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104
I'm still trying to figure this out myself, so take this with some skepticism and forgive me if...
Hexadecimal To Decimal in Shell Script
... perl:
$ perl -le 'print hex("FF");'
255
with printf :
$ printf "%d\n" 0xFF
255
with python:
$ python -c 'print(int("FF", 16))'
255
with ruby:
$ ruby -e 'p "FF".to_i(16)'
255
with node.js:
$ nodejs <<< "console.log(parseInt('FF', 16))"
255
with rhino:
$ rhino<<EOF
prin...
Commenting in a Bash script inside a multiline command
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207
This will have some overhead, but technically it does answer your question:
echo abc `#Put you...
C++ Lock-free Hazard Pointer（冒险指针） - C/C++ - 清泛网 - 专注C/C++及内核技术
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++cnt_;
return this;
}
void Deref() {
if (--cnt_ == 0) {
delete this;
}
}
private:
std::unique_ptr<T> ptr_;
std::atomic_uint32_t cnt_;
};
仔细观察可以发现：
每一次的读取操作对应引用计数中增加的数值 1；
当所有的...
Return from lambda forEach() in java
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edited May 6 '14 at 16:07
answered May 1 '14 at 11:53
Ia...