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bash assign default value
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209
Use a colon:
: ${A:=hello}
The colon is a null command that does nothing and ignores its arg...
Is file append atomic in UNIX?
...12 bytes, though it could easily be larger (linux seems to have it set to 4096).
This assume that you're talking all fully POSIX-compliant components. For instance, this isn't true on NFS.
But assuming you write to a log file you opened in 'O_APPEND' mode and keep your lines (including newline) u...
What is the relationship between the docker host OS and the container base image OS?
...er that I can get my hands on I see that I can install Docker on Ubuntu 12.04 (for example) and then I can install a Fedora container or a different version of ubuntu? (there is an example where the user installed busybox in the container.)
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Using psql how do I list extensions installed in a database?
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answered Feb 15 '14 at 16:04
a_horse_with_no_namea_horse_with_no_name
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Android: Create spinner programmatically from array
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abbood
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answered May 6 '10 at 20:37
Brandon O'Rour...
querySelector, wildcard element match?
...work.
– JaredMcAteer
Feb 11 '16 at 20:22
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ERROR: permission denied for sequence cities_id_seq using Postgres
...ited Apr 13 '17 at 12:26
simbo1905
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answered Feb 17 '12 at 8:43
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jQuery - Add ID instead of Class
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gsamaras
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answered Feb 1 '10 at 13:40
SarfrazSarfraz
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Android Studio - Where can I see callstack while debugging an android app?
... "Threads" ?
– ARLabs
Feb 6 '15 at 10:10
6
Thanks Nickolai, I didn't find "Threads" because I had...
Maximum on http header values?
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answered Mar 26 '09 at 15:20
vartecvartec
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