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How do I set environment variables from Java?
...t specific environment values for unit tests, you might find the following hack useful. It will change the environment variables throughout the JVM (so make sure you reset any changes after your test), but will not alter your system environment.
I found that a combination of the two dirty hacks by ...
Is it possible to modify variable in python that is in outer, but not global, scope?
...
@kindall that's a great hack - it's minimally different from the Python 3 syntax and much more readable than passing around a mutable object.
– dimo414
Sep 1 '15 at 0:17
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Vagrant error: NFS is reporting that your exports file is invalid
...ports which looks like this:
# VAGRANT-BEGIN: 501 64e10d4d-342e-4f55-b69a-97edda35742f
"/Users/[username]/vagrant" 192.168.11.12 -alldirs -mapall=501:20
# VAGRANT-END: 501 64e10d4d-342e-4f55-b69a-97edda35742f
# VAGRANT-BEGIN: 501 b3c6e7fe-95d4-48db-8876-c89d3e07af8d
"/Users/[username]/Sites/molitec...
Filter rows which contain a certain string
...71.1 65 4.22 1.835 19.90 1 1 4 1 Toyota Corolla
4 21.5 4 120.1 97 3.70 2.465 20.01 1 0 3 1 Toyota Corona
If you would like to do it the other way round, namely excluding Toyota and Mazda cars, the filter command looks like this:
dplyr::filter(mtcars, !grepl('Toyota|Mazda', ty...
Add vertical whitespace using Twitter Bootstrap?
... This adds space below group but not above
– icc97
Jan 8 '16 at 14:13
Of course it does, that's exactly what he a...
What good technology podcasts are out there?
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97 Answers
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Active
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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
...ctive 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...
Ruby optional parameters
...d
Trying out our class method with different parameters:
array = [1, 2, 97, 98, 99]
p array.ascii_to_text([32, 126, 1]) # Convert all ASCII values of 32-126 to their chr value otherwise keep it the same (That's what the optional 1 is for)
output: ["1", "2", "a", "b", "c"]
Okay, cool that works...
How is Docker different from a virtual machine?
...nswered Oct 14 '15 at 18:02
manu97manu97
6,04111 gold badge1414 silver badges1818 bronze badges
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What is the difference between the | and || or operators?
... Teaching people to use & and | as conditional operators is a hack, and will get them in trouble if they ever need use C/C++: 1 && 2 is true while 1 & 2 is false.
– BlueRaja - Danny Pflughoeft
Jan 17 '10 at 2:14
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