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Unix command to prepend text to a file
Is there a Unix command to prepend some string data to a text file?
16 Answers
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Installing Bower on Ubuntu
...nstructions on the Bower home page, after doing sudo apt-get install npm and sudo npm install -g bower I get the following after issuing bower on the command line:
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Getting the name of a variable as a string
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This glosses over all kinds of problems and caveats and gives the misleading impression that variable name inspection is something people can expect to "just work". For example, if you try to use varname.nameof as the retrieve_name function in the question, you get...
Android ListView headers
...ave ListView that has some kind of events on it. Events are sorted by day, and I would like to have header with date on it for every day, and then events listen below.
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How can I combine hashes in Perl?
...he best way to combine both hashes into %hash1? I always know that %hash2 and %hash1 always have unique keys. I would also prefer a single line of code if possible.
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How can I redirect HTTP requests made from an iPad?
... the edits take effect. On Ubuntu that's sudo service squid3 reload. Also--and maybe this is a config problem specific to my dev server--on my iPad I have to manually enter the http:// for address resolution to work correctly.
– Andy Giesler
Jun 4 '14 at 15:39
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Elegant way to invert a map in Scala
Learning Scala currently and needed to invert a Map to do some inverted value->key lookups. I was looking for a simple way to do this, but came up with only:
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Why do stacks typically grow downwards?
...the matter are that early CPUs got their original program counter set to 0 and it was a natural desire to start the stack at the other end and grow downwards, since their code naturally grows upward.
As an aside, note that this setting of the program counter to 0 on reset is not the case for all...
Programmatically generate video or animated GIF in Python?
...d not using images2gif from visvis because it has problems with PIL/Pillow and is not actively maintained (I should know, because I am the author).
Instead, please use imageio, which was developed to solve this problem and more, and is intended to stay.
Quick and dirty solution:
import imageio
im...
How to check that a string is a palindrome using regular expressions?
...d about finite state machines. A finite state machine is composed of nodes and edges. Each edge is annotated with a letter from a finite alphabet. One or more nodes are special "accepting" nodes and one node is the "start" node. As each letter is read from a given word we traverse the given edge in ...