diff options
Diffstat (limited to 'src/util.ts')
-rw-r--r-- | src/util.ts | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/util.ts b/src/util.ts new file mode 100644 index 0000000..337bf05 --- /dev/null +++ b/src/util.ts @@ -0,0 +1,33 @@ +import * as _ from 'lodash'; + + +export function mapFromObject<T>(obj: {[key: string]: T}): Map<string, T> { + return new Map(_.toPairs(obj)); +} + +export function mapValues<K, V1, V2>(f: (v: V1) => V2, map: Map<K, V1>): Map<K, V2> { + let ret: Map<K, V2> = new Map(); + + for (let [k, v] of map) + ret.set(k, f(v)); + + return ret; +} + +export async function mapValuesAsync<K, V1, V2>(f: (v: V1) => Promise<V2>, map: Map<K, V1>): Promise<Map<K, V2>> { + let ret: Map<K, V2> = new Map(); + + for (let [k, v] of mapValues(f, map)) + ret.set(k, await v); + + return ret; +} + +export function nextPowerOf2(n: number): number { + let i = 1; + + while (i < n) + i *= 2; + + return i; +} |