mirror of
https://iceshrimp.dev/crimekillz/iceshrimp-161sh.git
synced 2024-11-25 05:29:07 +01:00
20 lines
460 B
TypeScript
20 lines
460 B
TypeScript
export function countIf<T>(f: (x: T) => boolean, xs: T[]): number {
|
|
return xs.filter(f).length;
|
|
}
|
|
|
|
export function count<T>(x: T, xs: T[]): number {
|
|
return countIf(y => x === y, xs);
|
|
}
|
|
|
|
export function concat<T>(xss: T[][]): T[] {
|
|
return ([] as T[]).concat(...xss);
|
|
}
|
|
|
|
export function intersperse<T>(sep: T, xs: T[]): T[] {
|
|
return concat(xs.map(x => [sep, x])).slice(1);
|
|
}
|
|
|
|
export function erase<T>(x: T, xs: T[]): T[] {
|
|
return xs.filter(y => x !== y);
|
|
}
|