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Check if a Postgres JSON array contains a string
...te: Here's a demonstration of the performance improvements on a table of 1,000,000 rabbits where each 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(in...
Difference between git checkout --track origin/branch and git checkout -b branch origin/branch
...d need git checkout -B abranch origin/abranch)
Note: with Git 2.23 (Q3 2019), that would use the new command git switch:
git switch -c <branch> --track <remote>/<branch>
If the branch exists in multiple remotes and one of them is named by the checkout.defaultRemote configu...
Do C# Timers elapse on a separate thread?
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answered Sep 16 '09 at 22:43
JorenJoren
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Difference between int32, int, int32_t, int8 and int8_t
...rry Coffin
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1
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Start an Activity with a parameter
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David
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answered Oct 12 '10 at 10:35
WroclaiWroclai
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Array.Add vs +=
...nd the added value. For example, to add an element with a
value of 200 to the array in the $a variable, type:
$a += 200
Source: about_Arrays
+= is an expensive operation, so when you need to add many items you should try to add them in as few operations as possible, ex:
$arr = 1..3 ...
How to find the operating system version using JavaScript?
...
190
If you list all of window.navigator's properties using
console.log(navigator);
You'll see so...
Automapper - how to map to constructor parameters instead of property setters
...<ObjectFrom, ObjectTo>()
.ConstructUsing(x => new ObjectTo(arg0, arg1, etc));
...
using AutoMapper;
using NUnit.Framework;
namespace UnitTests
{
[TestFixture]
public class Tester
{
[Test]
public void Test_ConstructUsing()
{
Mapper.Crea...
Significance of bool IsReusable in http handler interface
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answered Feb 11 '09 at 23:21
AnthonyWJonesAnthonyWJones
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How to read a single char from the console in Java (as the user types it)?
... |
edited Sep 16 '17 at 0:09
stkent
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answered...