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Run Cron job every N minutes plus offset
...-59/20 * * * *
Explanation
An * in the minute field is the same as 0-59/1 where 0-59 is the range and 1 is the step. The command will run at the first minute in the range (0), then at all successive minutes that are distant from the first by step (1), until the last (59).
Which is why */20 * * *...
How to convert ActiveRecord results into an array of hashes
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212
as_json
You should use as_json method which converts ActiveRecord objects to Ruby Hashes despi...
PostgreSQL - Rename database
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191
Try not quoting the database name:
ALTER DATABASE people RENAME TO customers;
Also ensure t...
$on and $broadcast in angular
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edited Jul 23 '15 at 14:11
answered Oct 18 '13 at 10:07
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Understanding how recursive functions work
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18 Answers
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ConnectionTimeout versus SocketTimeout
...ctions where data is received all the time.
By setting socket timeout to 1 this would require that every millisecond new data is received (assuming that you read the data block wise and the block is large enough)!
If only the incoming stream stalls for more than a millisecond you are running int...
Git: How to diff two different files in different branches?
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216
git diff branch1:full/path/to/foo.txt branch2:full/path/to/foo-another.txt
You can also use r...
How do I interactively unstage a particular hunk in git?
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139
Try git reset --patch filename; this should do the opposite of git add --patch, according to t...
count number of lines in terminal output
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491
Pipe the result to wc using the -l (line count) switch:
grep -Rl "curl" ./ | wc -l
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