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How do I speed up the scroll speed in a JScrollPane when using the mouse wheel?
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Beautiful. I also noticed this affects the up and down arrows in the scroll bar, which is also very desired.
– Erick Robertson
Apr 7 '11 at 15:44
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Purpose of asterisk before a CSS property
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It is a browser specific CSS hack for versions 7 or below of Internet Explorer.
*property: value
Although Internet Explorer 7 corrected
its behavior when a property name is
prefixed with an underscore or a
hyphen, other non-alphan...
Copy table without copying data
...ncy. I've just been burned using this at scale, where we created about 50 different tables based off the same source table, at the same time as inserting into the source table from other processes. Basically caused a massive lock meltdown and had to restart MySQL.
– Mark B
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How to send email from Terminal?
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If all you need is a subject line (as in an alert message) simply do:
mailx -s "This is all she wrote" < /dev/null "myself@myaddress"
share
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Grep for literal strings
... (except a single quote) untouched by enclosing them inside single quotes. If you need to type a single quote do it like this 'I'\''m special'
– ndemou
Dec 2 '17 at 10:51
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TypeScript: Creating an empty typed container array
...Array constructor
var arr = new Array<Criminal>();
Explicitly specifying the type is the general solution for whenever type inference fails for a variable declaration.
The advantage of using a type assertion (sometimes called a cast, but it's not really a cast in TypeScript) works for any e...
Convert an integer to a float number
...is no float type. Looks like you want float64. You could also use float32 if you only need a single-precision floating point value.
package main
import "fmt"
func main() {
i := 5
f := float64(i)
fmt.Printf("f is %f\n", f)
}
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Chmod recursively
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You need read access, in addition to execute access, to list a directory. If you only have execute access, then you can find out the names of entries in the directory, but no other information (not even types, so you don't know which of the entries are subdirectories). This works for me:
find . -t...
In Postgresql, force unique on combination of two columns
...ique (col1, col2)
)
autoincrement is not postgresql. You want a serial.
If col1 and col2 make a unique and can't be null then they make a good primary key:
CREATE TABLE someTable (
col1 int NOT NULL,
col2 int NOT NULL,
primary key (col1, col2)
)
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Convert a matrix to a 1 dimensional array
...do as.vector() on the matrix. You might want to transpose the matrix first if you want it by rows or columns.
> m=matrix(1:12,3,4)
> m
[,1] [,2] [,3] [,4]
[1,] 1 4 7 10
[2,] 2 5 8 11
[3,] 3 6 9 12
> as.vector(m)
[1] 1 2 3 4 5 6 7 8 9 10 11 1...