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@blueprintjs/core

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/* * Copyright 2020 Palantir Technologies, Inc. All rights reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import { CLAMP_MIN_MAX } from "../errors"; /** Returns whether `process.env.NODE_ENV` exists and equals `env`. */ export function isNodeEnv(env) { return typeof process !== "undefined" && process.env && process.env.NODE_ENV === env; } /** * Returns the difference in length between two arrays. A `null` argument is * considered an empty list. The return value will be positive if `a` is longer * than `b`, negative if the opposite is true, and zero if their lengths are * equal. */ export function arrayLengthCompare(a = [], b = []) { return a.length - b.length; } /** * Returns true if the two numbers are within the given tolerance of each other. * This is useful to correct for floating point precision issues, less useful * for integers. */ export function approxEqual(a, b, tolerance = 0.00001) { return Math.abs(a - b) <= tolerance; } /** * Clamps the given number between min and max values. Returns value if within * range, or closest bound. */ export function clamp(val, min, max) { if (val == null) { return val; } if (max < min) { throw new Error(CLAMP_MIN_MAX); } return Math.min(Math.max(val, min), max); } /** Returns the number of decimal places in the given number. */ export function countDecimalPlaces(num) { if (!isFinite(num)) { return 0; } let e = 1; let p = 0; while (Math.round(num * e) / e !== num) { e *= 10; p++; } return p; } //# sourceMappingURL=jsUtils.js.map