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Check if a Postgres JSON array contains a string
...ch rabbit likes two foods and 10% of them like carrots:
d=# -- Postgres 9.3 solution
d=# explain analyze select info->>'name' from rabbits where exists (
d(# select 1 from json_array_elements(info->'food') as food
d(# where food::text = '"carrots"'
d(# );
Execution time: 3084.927 ms
d=...
What is Microsoft.csharp.dll in .NET 4.0
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edited Mar 13 '12 at 8:26
Matthew Lock
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Excluding directories in os.walk
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edited Sep 7 at 13:13
FLASH3G
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answered Nov 8 '13 at 13:10
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How to create index on JSON field in Postgres?
In PostgreSQL 9.3 Beta 2 (?), how do I create an index on a JSON field? I tried it using the -> operator used for hstore but got the following error:
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How to load a tsv file into a Pandas DataFrame?
...ion that appears to do what you want:
DataFrame.from_csv('c:/~/trainSetRel3.txt', sep='\t')
If you have a header, you can pass header=0.
DataFrame.from_csv('c:/~/trainSetRel3.txt', sep='\t', header=0)
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How do you implement an async action delegate method?
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309
The async equivalent of Action<T> is Func<T, Task>, so I believe this is what you'...
Implementing slicing in __getitem__
...m__(self, val):
... print val
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>>> c = C()
>>> c[3]
3
>>> c[3:4]
slice(3, 4, None)
>>> c[3:4:-2]
slice(3, 4, -2)
>>> c[():1j:'a']
slice((), 1j, 'a')
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Does BroadcastReceiver.onReceive always run in the UI thread?
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CommonsWareCommonsWare
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Multiple commands on a single line in a Windows batch file
.../v:on /c "echo !time! & ping 127.0.0.1 >nul: & echo !time!"
15:23:36.77
15:23:39.85
That's needed from the command line. If you're doing this inside a script, you can just use setlocal:
@setlocal enableextensions enabledelayedexpansion
@echo off
echo !time! & ping 127.0.0.1 >nul...
How does Django's Meta class work?
...:55
Moon
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answered Apr 27 '12 at 3:04
TadeckTadeck
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