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What is the most elegant way to remove a path from the $PATH variable in Bash?
Or more generally, how do I remove an item from a colon-separated list in a Bash environment variable?
33 Answers
...
Concatenate two slices in Go
...ich constructs a slice and also controls the resulting slice's capacity by setting it to max - low.
See the modified example (the only difference is that we create x like this: x = a[:2:2]:
a := [10]int{1, 2}
fmt.Printf("a: %v\n", a)
x, y := a[:2:2], []int{3, 4}
fmt.Printf("x: %v, y: %v\n", x, y)...
How to modify existing, unpushed commit messages?
...change the commit message of the most recent commit. Additionally, you can set the commit message directly in the command line with:
git commit --amend -m "New commit message"
…however, this can make multi-line commit messages or small corrections more cumbersome to enter.
Make sure you don't hav...
What's the absurd function in Data.Void useful for?
...f bad behaviour uniformly. For perfectly well behaved computations in this setting, take e to be Void, then use
either absurd id :: Either Void v -> v
to run safely or
either absurd Right :: Either Void v -> Either e v
to embed safe components in an unsafe world.
Oh, and one last hurrah...
C++ SFINAE examples?
...ompared to the other implementations, this one is fairly simple: a reduced set of tools (void_t and detect) suffices. Besides, it was reported (see N4502) that it is measurably more efficient (compile-time and compiler memory consumption) than previous approaches.
Here is a live example, which inc...
Replace multiple characters in a C# string
...te through the array of characters the least amount of times. Note the HashSet here, as it avoids to traverse the character sequence inside the loop. Should you need an even faster lookup, you can replace HashSet by an optimized lookup for char (based on an array[256]).
Example with StringBuilder
pu...
Alternative to google finance api [closed]
I wanted to use Google Finance API to get stock data about the company but this API is deprecated since 2011/26/05.
5 Answe...
Extracting bits with a single multiplication
... something that a theorem prover can understand, namely SMT-LIB 2 input:
(set-logic BV)
(declare-const mask (_ BitVec 64))
(declare-const multiplicand (_ BitVec 64))
(assert
(forall ((x (_ BitVec 64)))
(let ((y (bvmul (bvand mask x) multiplicand)))
(and
(= ((_ extract ...
Getting ssh to execute a command in the background on target machine
This is a follow-on question to the How do you use ssh in a shell script? question. If I want to execute a command on the remote machine that runs in the background on that machine, how do I get the ssh command to return? When I try to just include the ampersand (&) at the end of the command it ...
How to 'bulk update' with Django?
...o signals will be emitted.
You can't perform an .update() on a sliced QuerySet, it must be on an original QuerySet so you'll need to lean on the .filter() and .exclude() methods.
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