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Static class initializer in PHP
...nswers (including this one), I prefer Victor Nicollet's answer. Simple. No extra coding required. No "advanced" coding to understand. (I recommend including FrancescoMM's comment, to make sure "init" will never execute twice.)
So I could have not bothered to write this answer. But so many people up...
How to find a table having a specific column in postgresql
...
Wildcard Support
Find the table schema and table name that contains the string you want to find.
select t.table_schema,
t.table_name
from information_schema.tables t
inner join information_schema.columns c on c.table_name = t.table_name
and c.table_schema =...
How to make an AJAX call without jQuery?
...be more convenient than a 'simple' callback? Is this convenience worth the extra effort to transpile it for old browser support?
– lennyklb
Apr 24 '17 at 12:13
...
Printing 1 to 1000 without loop or conditionals
...es, blowing up the code size, right? You might as well generate the output string itself instead of a thousand printfs.
– Darius Bacon
Jan 3 '11 at 8:44
...
Can you give a Django app a verbose name for use throughout the admin?
... the sense that it only effects what's shown to the user. It's the literal string used to name the table in the database, which requires a schema migration if you're changing an existing model.
– Cerin
Apr 11 '12 at 16:14
...
Are single quotes allowed in HTML?
...uotes in PHP so that I can interpolate variables rather than concatenating strings. As a result, when I am generating HTML I often use single quotes for setting tag fields. For example:
...
Get all unique values in a JavaScript array (remove duplicates)
...ust be a duplicate and will not be copied.
This solution works without any extra library like jQuery or prototype.js.
It works for arrays with mixed value types too.
For old Browsers (<ie9), that do not support the native methods filter and indexOf you can find work arounds in the MDN documentati...
How to remove old Docker containers
...optionally, volumes, in one command.
For older Docker versions, you can string Docker commands together with other Unix commands to get what you need. Here is an example on how to clean up old containers that are weeks old:
$ docker ps --filter "status=exited" | grep 'weeks ago' | awk '{print $1...
Reduce, fold or scan (Left/Right)?
...the collection (from A to C):
val abc = List("A", "B", "C")
def add(res: String, x: String) = {
println(s"op: $res + $x = ${res + x}")
res + x
}
abc.reduceLeft(add)
// op: A + B = AB
// op: AB + C = ABC // accumulates value AB in *first* operator arg `res`
// res: String = ABC
abc.foldLe...
Why is it impossible to override a getter-only property and add a setter? [closed]
...or the purpose of serialization.
interface ITest
{
// Other stuff
string Prop { get; }
}
// Implements other stuff
abstract class ATest : ITest
{
abstract public string Prop { get; }
}
// This implementation of ITest needs the user to set the value of Prop
class BTest : ATest
{
st...