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How to pip install a package with min and max version range?
...hich should never be installed (theoretical api: pip install package<0.3 ).
3 Answers
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Ternary operator is twice as slow as an if-else block?
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376
To answer this question, we'll examine the assembly code produced by the X86 and X64 JITs for ...
Difference between doseq and for in Clojure
...seq is for executing side-effects and returns nil.
user=> (for [x [1 2 3]] (+ x 5))
(6 7 8)
user=> (doseq [x [1 2 3]] (+ x 5))
nil
user=> (doseq [x [1 2 3]] (println x))
1
2
3
nil
If you want to build a new sequence based on other sequences, use for. If you want to do side-effects (print...
How to get one value at a time from a generator function in Python?
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answered Mar 10 '10 at 19:13
Ignacio Vazquez-AbramsIgnacio Vazquez-Abrams
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How to assign colors to categorical variables in ggplot2 that have stable mapping?
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edited Apr 3 '16 at 16:20
Axeman
25.5k66 gold badges6363 silver badges7171 bronze badges
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20个命令行工具监控 Linux 系统性能 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ive si so bi bo in cs us sy id wa st
1 0 0 810420 97380 70628 0 0 115 4 89 79 1 6 90 3 0
3. lsof — 打开文件列表
lsof 命令对于很多 Linux/Unix 系统都可以使用，主要以列表的形式显示打开的文件和进程。
打开的文件...
Java exception not caught?
... block that also throws an exception:
} finally {
throw new Exception("3");
}
Exception("2") will be discarded and only Exception("3") will be propagated.
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Finding local IP addresses using Python's stdlib
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answered Oct 3 '08 at 12:06
Vinko VrsalovicVinko Vrsalovic
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Is there a zip-like function that pads to longest length in Python?
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In Python 3 you can use itertools.zip_longest
>>> list(itertools.zip_longest(a, b, c))
[('a1', 'b1', 'c1'), (None, 'b2', 'c2'), (None, 'b3', None)]
You can pad with a different value than None by using the fillvalue paramet...
Convert JavaScript string in dot notation into an object reference
...that will be displayed to the user. Like using a date as a string "1999-12-30" rather than a Date object (which can cause timezone bugs or added serialization complexity if not careful). Or you know what you're doing.
This is maybe fine. Be careful that there are no dot strings "." in your s...