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Difference between doseq and for in Clojure
...seq is for executing side-effects and returns nil.
user=> (for [x [1 2 3]] (+ x 5))
(6 7 8)
user=> (doseq [x [1 2 3]] (+ x 5))
nil
user=> (doseq [x [1 2 3]] (println x))
1
2
3
nil
If you want to build a new sequence based on other sequences, use for. If you want to do side-effects (print...
Gradients on UIView and UILabels On iPhone [duplicate]
...erKendall Helmstetter Gelner
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Python creating a dictionary of lists
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>>> d
defaultdict(<type 'list'>, {1: ['1'], 2: ['1', '2'], 3: ['2']})
>>> d.items()
[(1, ['1']), (2, ['1', '2']), (3, ['2'])]
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optional parameters in SQL Server stored proc?
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Where can I get a list of Ansible pre-defined variables?
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203
Argh! From the FAQ:
How do I see a list of all of the ansible_ variables?
Ansible by default ga...
Nested rows with bootstrap grid system?
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305
Bootstrap Version 3.x
As always, read Bootstrap's great documentation:
3.x Docs: https://get...
Object.getOwnPropertyNames vs Object.keys
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dfsqdfsq
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PHP shell_exec() vs exec()
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356
shell_exec returns all of the output stream as a string. exec returns the last line of the out...
Reading a delimited string into an array in Bash
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339
In order to convert a string into an array, please use
arr=($line)
or
read -a arr <<...