psksvp
/ Pairup.scala
Last active
April 4, 2021 01:36
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| // pairup a seq | |
| // psksvp@gmail.com | |
| object Pairup | |
| { | |
| def main(args: Array[String]): Unit = | |
| { | |
| println("hello") | |
| val a = List(1, 2, 3, 4, 5, 6) //even | |
| val b = pairup(a) |
psksvp
/ Array+Combinatorial.swift
Last active
August 20, 2020 02:50
swift array extension that deals with generating combinations and permutations
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| /** | |
| translate from Scala by psksvp@gmail.com | |
| http://vkostyukov.ru/posts/combinatorial-algorithms-in-scala/ | |
| */ | |
| extension Collection | |
| { | |
| func combinations(_ n: Int) -> [[Element]] | |
| { | |
| guard self.count > 0 else {return [[Element]]()} | |
| guard n <= self.count else {return [[Element]]()} |
psksvp
/ approximateFraction.swift
Last active
July 22, 2020 03:02
Find rational approximation to given real number
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| // approximate the fraction of a real | |
| // Created by psksvp on 22/7/20. | |
| print(approximateFraction(0.5)) | |
| print(approximateFraction(0.5454)) | |
| print(approximateFraction(0.75)) | |
| print(approximateFraction(0.333333)) | |
| print(approximateFraction(0.888888888888)) | |
| print(approximateFraction(0.0123456789)) |
psksvp
/ renameXcode.makefile
Last active
January 26, 2020 04:37
Rename Xcode project (11.3.1 (11C504))
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| I put in the make file from https://stackoverflow.com/questions/33370175/how-do-i-completely-rename-an-xcode-project-i-e-inclusive-of-folders | |
| It was originally written by https://stackoverflow.com/users/7641654/pietro-basso | |
| __USE AT YOUR OWN RISK, ALWAYS BACK UP before doing this. You must read the post before using this.__ | |
| The makefile needs `ack` and `rename` which can be install with `brew install ack rename` | |
| put this file the project directory then run `make -f renameXcode.makefile OLD_NAME="oldname" NEW_NAME="newname"` |
psksvp
/ gist:bb84c28bee8753f4d0af791d79bf281d
Last active
January 11, 2020 13:09
int index of Swift String
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| public extension String | |
| { | |
| func intIndex(of s: String) -> Int? | |
| { | |
| if let r = self.range(of: s) | |
| { | |
| return self.distance(from: self.startIndex, to: r.lowerBound) | |
| } | |
| else | |
| { |
psksvp
/ gist:9f931dc171be90298383823bf6138b9c
Created
January 10, 2020 09:44
fix screen brightness cannot be adjusted probelm on 2103 iMac with Ubuntu 18.10
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| open the file */etc/default/grub* with a text editor with sudo | |
| change the line | |
| GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" | |
| to | |
| GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor" | |
| saved, then run |