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42 lines
1.4 KiB
TypeScript
42 lines
1.4 KiB
TypeScript
/*
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Copyright 2021 The Matrix.org Foundation C.I.C.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* Returns the default number if the given value, i, is not a number. Otherwise
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* returns the given value.
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* @param {*} i The value to check.
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* @param {number} def The default value.
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* @returns {number} Either the value or the default value, whichever is a number.
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*/
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export function defaultNumber(i: unknown, def: number): number {
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return Number.isFinite(i) ? Number(i) : def;
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}
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export function clamp(i: number, min: number, max: number): number {
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return Math.min(Math.max(i, min), max);
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}
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export function sum(...i: number[]): number {
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return [...i].reduce((p, c) => c + p, 0);
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}
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export function percentageWithin(pct: number, min: number, max: number): number {
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return (pct * (max - min)) + min;
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}
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export function percentageOf(val: number, min: number, max: number): number {
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return (val - min) / (max - min);
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}
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