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sed error: “invalid reference \1 on `s' command's RHS”
... variant 2:
-r -e "s/WARNING: (\([a-zA-Z0-9./\\ :-]\+\))/${warn}WARNING: \1${c_end}/g" \
(Note: untested)
Without the -r argument back-references (like \1) won't work.
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rmagick gem install “Can't find Magick-config”
...hown below when attempting to install the rmagick gem. I am on Snowleopard 10.6 using RVM, Ruby 1.9.2-head and Rails 3.05. Responses to similar questions recommended installing ImageMagick, which I successfully did. Other suggested installing the "libmagick9-dev library", however, I can not figure o...
Why does direction of index matter in MongoDB?
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114
MongoDB concatenates the compound key in some way and uses it as the key in a BTree.
When fin...
Single Line Nested For Loops
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172
The best source of information is the official Python tutorial on list comprehensions. List c...
Combining two lists and removing duplicates, without removing duplicates in original list
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11 Answers
11
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get all keys set in memcached
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179
Found a way, thanks to the link here (with the original google group discussion here)
First, ...
How do SQL EXISTS statements work?
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edited Oct 23 '16 at 0:55
answered Apr 30 '12 at 7:06
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How to remove multiple indexes from a list at the same time? [duplicate]
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answered Jul 3 '12 at 1:08
Ned BatchelderNed Batchelder
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Getting pids from ps -ef |grep keyword
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edited Nov 14 '11 at 10:59
answered Nov 14 '11 at 10:41
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warning: implicit declaration of function
... a declaration ("prototype") yet.
For example:
int main()
{
fun(2, "21"); /* The compiler has not seen the declaration. */
return 0;
}
int fun(int x, char *p)
{
/* ... */
}
You need to declare your function before main, like this, either directly or in a header:
int fun(int ...