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How to get the current branch name in Git?
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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
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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...
Reverse Y-Axis in PyPlot
I have a scatter plot graph with a bunch of random x, y coordinates. Currently the Y-Axis starts at 0 and goes up to the max value. I would like the Y-Axis to start at the max value and go up to 0.
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Convert String array to ArrayList [duplicate]
I want to convert String array to ArrayList . For example String array is like:
5 Answers
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Django - limiting query results
I want to take the last 10 instances of a model and have this code:
5 Answers
5
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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(...
Vim: faster way to select blocks of text in visual mode
... you can also expand your selection using pattern searches.
For example, v/foo will select from your current position to the next instance of "foo." If you actually wanted to expand to the next instance of "foo," on line 35, for example, just press n to expand selection to the next instance, and so ...
How to compile and run C/C++ in a Unix console/Mac terminal?
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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...
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
share
|
improve this answ...
capturing self strongly in this block is likely to lead to a retain cycle
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