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Can PostgreSQL index array columns?
... array, but you have to use the array operators and the GIN-index type.
Example:
CREATE TABLE "Test"("Column1" int[]);
INSERT INTO "Test" VALUES ('{10, 15, 20}');
INSERT INTO "Test" VALUES ('{10, 20, 30}');
CREATE INDEX idx_test on "Test" USING GIN ("Column1");
-- To enforce ...
Displaying a message in iOS which has the same functionality as Toast in Android
...hTime.now() + seconds) {
alert.dismiss(animated: true)
}
}
Example of calling:
showToast(controller: self, message : "This is a test", seconds: 2.0)
Output:
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When to use enumerateObjectsUsingBlock vs. for
...s not just due to the autorelease pool. There is a lot more stack pushing & popping with enumerate:
– Adam Kaplan
Jan 7 '17 at 22:15
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How to use hex color values
...enience init(red: Int, green: Int, blue: Int) {
assert(red >= 0 && red <= 255, "Invalid red component")
assert(green >= 0 && green <= 255, "Invalid green component")
assert(blue >= 0 && blue <= 255, "Invalid blue component")
self...
Suppressing “is never used” and “is never assigned to” warnings in C#
...1 |= 0; // test1 is still 12345
bool test2 = true;
test2 &= false; // test2 is now false
Both expressions don't produce unused variable warnings in VS2010 C# 4.0 and Mono 2.10 compilers.
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How to specify Composer install path?
...allers package, as symfony1 have a plugin there :) Check Symfony1Installer.php
– spirit
Apr 2 at 8:04
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Is there an expression for an infinite generator?
...
for x in iter(int, 1): pass
Two-argument iter = zero-argument callable + sentinel value
int() always returns 0
Therefore, iter(int, 1) is an infinite iterator. There are obviously a huge number of variations on this particular theme (especially once you add lambda into the mix). One va...
How to force vim to syntax-highlight a file as html?
... :set syntax=<type> where <type> is something like perl, html, php, etc.
There is another mechanism that can be used to control syntax highlighting called filetype, or ft for short. Similar to syntax, you give it a type like this: :set filetype=html. Other filetypes are perl, php, etc.
S...
How can I convert a series of images to a PDF from the command line on linux? [closed]
...rver I wrote in cgi/bash and want to be able to convert a bunch of images (all in one folder) to a pdf from the command line. How can that be done?
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How to pass parameters in $ajax POST?
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what is field1: and what is "hello"? Variables in JS or PHP?
– MTBthePRO
Jul 22 '19 at 17:50
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