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Algorithm to generate all possible permutations of a list?
Say I have a list of n elements, I know there are n! possible ways to order these elements. What is an algorithm to generate all possible orderings of this list? Example, I have list [a, b, c]. The algorithm would return [[a, b, c], [a, c, b,], [b, a, c], [b, c, a], [c, a, b], [c, b, a]].
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Where can I learn jQuery? Is it worth it?
...ces learning about web development on w3schools.com . It's hit or miss, I know, but the PHP and CSS sections specifically have proven very useful for reference.
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What does 'foo' really mean?
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See: RFC 3092: Etymology of "Foo", D. Eastlake 3rd et al.
Quoting only the relevant definitions from that RFC for brevity:
Used very generally as a sample name for absolutely anything, esp.
programs and files (esp. scratch files).
First on the standard li...
How to simulate the environment cron executes a script with?
...ts as they normally don't have my environment setup. Is there a way to invoke bash(?) in the same way cron does so I could test scripts before installing them?
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Passing a dictionary to a function as keyword parameters
I'd like to call a function in python using a dictionary.
4 Answers
4
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How can I declare and define multiple variables in one line using C++?
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Chris Eberle
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answered Jul 27 '11 at 1:12
JoshJosh
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Rename a dictionary key
Is there a way to rename a dictionary key, without reassigning its value to a new name and removing the old name key; and without iterating through dict key/value?
In case of OrderedDict, do the same, while keeping that key's position.
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Maximum length for MySQL type text
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BLOB, TEXT L + 2 bytes, where L < 2^16 (64 Kilobytes)
MEDIUMBLOB, MEDIUMTEXT L + 3 bytes, where L < 2^24 (16 Megabytes)
LONGBLOB, LONGTEXT L + 4 bytes, where L < 2^32 (4 Gigabytes)
L is the number of bytes in your text field. So the maximum number ...
Meaning of “[: too many arguments” error from if [] (square brackets)
...tring containing spaces or other special characters, and single square brackets are used (which is a shortcut for the test command), then the string may be split out into multiple words. Each of these is treated as a separate argument.
So that one variable is split out into many arguments:
VARIAB...
How to find the largest file in a directory and its subdirectories?
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Quote from this link-
If you want to find and print the top 10 largest files names (not
directories) in a particular directory and its sub directories
$ find . -printf '%s %p\n'|sort -nr|head
To restrict the search to the presen...