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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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What's the best way to iterate over two or more containers simultaneously
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edited Nov 19 '18 at 11:25
answered Sep 25 '13 at 13:19
K...
Given an emacs command name, how would you find key-bindings ? (and vice versa)
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2
So, I can where-is where-is when I forget C-h w. That's great ! ;)
– Sake
Jun 9 '09 at 0:48
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Why do all browsers' user agents start with “Mozilla/”?
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298
It is a long and sad story.
In summary:
Mozilla browser gets released, with User-Agent Mozi...
How to sort a list of objects based on an attribute of the objects?
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edited Sep 9 '19 at 12:57
Dorian Turba
72699 silver badges2020 bronze badges
answered Dec 31 '08 at...
How do I set the size of an HTML text box?
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Just use:
textarea {
width: 200px;
}
or
input[type="text"] {
width: 200px;
}
Depending on what you mean by 'textbox'.
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Rails 3 check if attribute changed
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282
Check out ActiveModel::Dirty (available on all models by default). The documentation is really...
How to detect the currently pressed key?
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edited Dec 26 '13 at 21:54
vahid abdi
7,39244 gold badges2626 silver badges3333 bronze badges
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Calculate a percent with SCSS/SASS
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218
Have you tried the percentage function ?
$my_width: percentage(4/12);
div{
width: $my_width;
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How to check if an appSettings key exists?
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223
MSDN: Configuration Manager.AppSettings
if (ConfigurationManager.AppSettings[name] != null)
{...