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JavaScript: What are .extend and .prototype used for?
...nd it will inherit from its constructor prototype.
For example:
function Foo () {
}
Foo.prototype.bar = true;
var foo = new Foo();
foo.bar; // true
foo instanceof Foo; // true
Foo.prototype.isPrototypeOf(foo); // true
s...
Sorting object property by values
...way to do the same thing as bonna:
var list = {"you": 100, "me": 75, "foo": 116, "bar": 15};
keysSorted = Object.keys(list).sort(function(a,b){return list[a]-list[b]})
console.log(keysSorted); // bar,me,you,foo
...
MySQL: How to copy rows, but change a few fields?
...
Let's say your table has two other columns: foo and bar
INSERT INTO Table (foo, bar, Event_ID)
SELECT foo, bar, "155"
FROM Table
WHERE Event_ID = "120"
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im...
Adding HTML entities using CSS content
...igits for the escape sequence:
.breadcrumbs a:before {
content: '\0000a0foo';
}
b) Add one white-space (e. g., space) character after the escape sequence:
.breadcrumbs a:before {
content: '\a0 foo';
}
(Since f is a hexadecimal digit, \a0f would otherwise mean GURMUKHI LETTER EE here, or ...
Insert, on duplicate update in PostgreSQL?
...s in bulk, using CTEs in 9.1 and above, in the hackers mailing list:
WITH foos AS (SELECT (UNNEST(%foo[])).*)
updated as (UPDATE foo SET foo.a = foos.a ... RETURNING foo.id)
INSERT INTO foo SELECT foos.* FROM foos LEFT JOIN updated USING(id)
WHERE updated.id IS NULL;
See a_horse_with_no_name's an...
How to get the current branch name in Git?
...
after doing a git checkout --orphan foo then git branch failed to show branch foo. Whereas git symbolic-ref HEAD as suggested another answer worked.
– Marcus Junius Brutus
Sep 11 '16 at 20:13
...
Using reflect, how do you set the value of a struct field?
...his seems to work:
package main
import (
"fmt"
"reflect"
)
type Foo struct {
Number int
Text string
}
func main() {
foo := Foo{123, "Hello"}
fmt.Println(int(reflect.ValueOf(foo).Field(0).Int()))
reflect.ValueOf(&foo).Elem().Field(0).SetInt(321)
fmt.Println(...
sed: print only matching group
...uses the entire line to be replaced with the contents of the group
echo "foo bar <foo> bla 1 2 3.4" |
sed -n 's/.*\([0-9][0-9]*[\ \t][0-9.]*[ \t]*$\)/\1/p'
2 3.4
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How to compile and run C/C++ in a Unix console/Mac terminal?
...
If it is a simple single source program:
make foo
where the source file is foo.c or foo.cpp, etc.
You dont even need a makefile. Make has enough built-in rules to build your source file into an executable of the same name, minus extension.
Running the executable just...
What is the purpose of a self executing function in javascript?
...example, as mentioned in a comment by Alexander:
(function() {
var foo = 3;
console.log(foo);
})();
console.log(foo);
This will first log 3 and then throw an error on the next console.log because foo is not defined.
...