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How do I negate a test with regular expressions in a bash script?
Using GNU bash (version 4.0.35(1)-release (x86_64-suse-linux-gnu), I would like to negate a test with Regular Expressions. For example, I would like to conditionally add a path to the PATH variable, if the path is not already there, as in:
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python dataframe pandas drop column using int
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edited Feb 16 '16 at 10:48
frederikf
333 bronze badges
answered Nov 30 '13 at 15:06
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乐高 EV3 实验02 - 差速小车遥控 · App Inventor 2 中文网
...索 乐高 EV3 实验02 - 差速小车遥控
实验02：差速小车遥控
这个实验做完你会得到什么
一、器材与组装
二、界面组件
三、分步搭代码...
Check whether a string contains a substring
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edited Dec 15 '15 at 9:40
answered Sep 2 '11 at 12:21
Eug...
curl -GET and -X GET
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270
By default you use curl without explicitly saying which request method to use. If you just pass ...
XPath: How to select nodes which have no attributes?
...ath, how to select nodes which have no attributes (where attribute count = 0)?
3 Answers
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How do I search within an array of hashes by hash values in ruby?
...@fathers.select {|father| father["age"] > 35 }
# => [ { "age" => 40, "father" => "Bob" },
# { "age" => 50, "father" => "Batman" } ]
Per the documentation, it "returns an array containing all elements of [the enumerable, in this case @fathers] for which block is not false."
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LINQ: “contains” and a Lambda query
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edited Jan 13 at 12:08
Malice
3,75911 gold badge3333 silver badges4949 bronze badges
answered Oct ...
convert streamed buffers to utf8-string
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edited Jul 19 '16 at 19:20
Sharikov Vladislav
5,88144 gold badges3636 silver badges7171 bronze badges
a...
What function is to replace a substring from a string in C?
...| !rep)
return NULL;
len_rep = strlen(rep);
if (len_rep == 0)
return NULL; // empty rep causes infinite loop during count
if (!with)
with = "";
len_with = strlen(with);
// count the number of replacements needed
ins = orig;
for (count = 0; tmp = s...