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What is the difference between a route and resource in New Router API?
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thecodejack
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answered Feb 20 '13 at 9:35
mavileinmavilein
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What is the most efficient/elegant way to parse a flat table into a tree?
...id, descendant_id) VALUES
(1,1), (1,2), (1,4), (1,6),
(2,2), (2,4),
(3,3), (3,5),
(4,4),
(5,5),
(6,6);
Now you can get a tree starting at node 1 like this:
SELECT f.*
FROM FlatTable f
JOIN ClosureTable a ON (f.id = a.descendant_id)
WHERE a.ancestor_id = 1;
The output (in MySQL c...
Command line CSV viewer? [closed]
...e demonstrates how to use sed to insert a placeholder:
$ cat data.csv
1,2,3,4,5
1,,,,5
$ sed 's/,,/, ,/g;s/,,/, ,/g' data.csv | column -s, -t
1 2 3 4 5
1 5
$ cat data.csv
1,2,3,4,5
1,,,,5
$ column -s, -t < data.csv
1 2 3 4 5
1 5
$ sed 's/,,/, ,/g;s/,,/, ,/g' data.csv | column ...
How does grep run so fast?
... The result of this is
that, in the limit, GNU grep averages fewer than 3 x86 instructions
executed for each input byte it actually looks at (and it skips many
bytes entirely).
GNU grep uses raw Unix input system calls and avoids copying data
after reading it. Moreover, GNU grep AVOIDS...
Node.js + Express: Routes vs controller
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Michelle TilleyMichelle Tilley
146k3737 gold badges348348 silver badges300300 bronze badges
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#pragma pack effect
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433
#pragma pack instructs the compiler to pack structure members with particular alignment. Most ...
#include in .h or .c / .cpp?
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answered Jun 8 '10 at 23:36
Brendan LongBrendan Long
47.5k1616 gold badges123123 silver badges167167 bronze badges
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Heroku Postgres - terminate hung query (idle in transaction)
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139
This is a general Postgres answer, and not specific to heroku
(The simple-stupid answer to t...
“Insert if not exists” statement in SQLite
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edited Apr 13 '18 at 6:12
answered Oct 12 '13 at 17:38
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