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How can I create directories recursively? [duplicate]
... answered May 14 '11 at 18:48
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sed in-place flag that works both on Mac (BSD) and Linux
Is there an invocation of sed todo in-place editing without backups that works both on Linux and Mac? While the BSD sed shipped with OS X seems to need sed -i '' … , the GNU sed Linux distributions usually come with interprets the quotes as empty input file name (instead of the backup exten...
Unix command to find lines common in two files
...sion 3.2.51(1)-release
Copyright (C) 2007 Free Software Foundation, Inc.
$ cat > abc
123
567
132
$ cat > def
132
777
321
So the files abc and def have one line in common, the one with "132".
Using comm on unsorted files:
$ comm abc def
123
132
567
132
777
321
$ comm -12 abc def ...
What's the difference between a catalog and a schema in a relational database?
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From the relational point of view :
The catalog is the place where--among other things--all of the various schemas (external, conceptual, internal) and all of the corresponding mappings (external/conceptual, conceptual/internal) are kept.
In other words, the ...
How do I make a Git commit in the past?
...se git add, but you would first need to copy the file from some external location to the expected path (--index-filter runs its command in a temporary GIT_WORK_TREE that is empty).
If you want your new file to be added to every existing commit, then you can do this:
new_file=$(git hash-object -w p...
Copying files from host to Docker container
...rly ugly way of doing it but it works.
docker run -i ubuntu /bin/bash -c 'cat > file' < file
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What's the difference between UTF-8 and UTF-8 without BOM?
...is ok), then some quotation mark without space in-between (not ok). ¿ indicates it is Spanish but ï is not used in Spanish. Conclusion: It is not latin-1 with a certainty well above the certainty without it.
– user877329
Nov 5 '13 at 7:20
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How to detect if a script is being sourced
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Additional tests could be included to check for those invocation methods.
– Paused until further notice.
Feb 19 '13 at 1:33
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How to install packages using pip according to the requirements.txt file from a local directory?
... requirements.txt file.
cd to the directory where requirements.txt is located
activate your virtualenv
run: pip install -r requirements.txt in your shell
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string.charAt(x) or string[x]?
...n a string. The first is the charAt method, part of ECMAScript 3:
return 'cat'.charAt(1); // returns "a"
The other way is to treat the string as an array-like object, where each individual characters correspond to a numerical index. This has been supported by most browsers since their first v...