apache-arrow/util/vector.mjs.map

Apache Arrow columnar in-memory format

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Licensed to the Apache Software Foundation (ASF) under one\n// or more contributor license agreements.  See the NOTICE file\n// distributed with this work for additional information\n// regarding copyright ownership.  The ASF licenses this file\n// to you under the Apache License, Version 2.0 (the\n// \"License\"); you may not use this file except in compliance\n// with the License.  You may obtain a copy of the License at\n//\n//   http://www.apache.org/licenses/LICENSE-2.0\n//\n// Unless required by applicable law or agreed to in writing,\n// software distributed under the License is distributed on an\n// \"AS IS\" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY\n// KIND, either express or implied.  See the License for the\n// specific language governing permissions and limitations\n// under the License.\n\nimport { Vector } from '../vector';\nimport { MapRow, StructRow } from '../vector/row';\nimport { compareArrayLike } from '../util/buffer';\nimport { BigInt, BigIntAvailable } from './compat';\n\n/** @ignore */\ntype RangeLike = { length: number; stride?: number };\n/** @ignore */\ntype ClampThen<T extends RangeLike> = (source: T, index: number) => any;\n/** @ignore */\ntype ClampRangeThen<T extends RangeLike> = (source: T, offset: number, length: number) => any;\n\nexport function clampIndex<T extends RangeLike>(source: T, index: number): number;\nexport function clampIndex<T extends RangeLike, N extends ClampThen<T> = ClampThen<T>>(source: T, index: number, then: N): ReturnType<N>;\n/** @ignore */\nexport function clampIndex<T extends RangeLike, N extends ClampThen<T> = ClampThen<T>>(source: T, index: number, then?: N) {\n    const length = source.length;\n    const adjust = index > -1 ? index : (length + (index % length));\n    return then ? then(source, adjust) : adjust;\n}\n\n/** @ignore */\nlet tmp: number;\nexport function clampRange<T extends RangeLike>(source: T, begin: number | undefined, end: number | undefined): [number, number];\nexport function clampRange<T extends RangeLike, N extends ClampRangeThen<T> = ClampRangeThen<T>>(source: T, begin: number | undefined, end: number | undefined, then: N): ReturnType<N>;\n/** @ignore */\nexport function clampRange<T extends RangeLike, N extends ClampRangeThen<T> = ClampRangeThen<T>>(source: T, begin: number | undefined, end: number | undefined, then?: N) {\n\n    // Adjust args similar to Array.prototype.slice. Normalize begin/end to\n    // clamp between 0 and length, and wrap around on negative indices, e.g.\n    // slice(-1, 5) or slice(5, -1)\n    let { length: len = 0 } = source;\n    let lhs = typeof begin !== 'number' ? 0 : begin;\n    let rhs = typeof end !== 'number' ? len : end;\n    // wrap around on negative start/end positions\n    (lhs < 0) && (lhs = ((lhs % len) + len) % len);\n    (rhs < 0) && (rhs = ((rhs % len) + len) % len);\n    // ensure lhs <= rhs\n    (rhs < lhs) && (tmp = lhs, lhs = rhs, rhs = tmp);\n     // ensure rhs <= length\n    (rhs > len) && (rhs = len);\n\n    return then ? then(source, lhs, rhs) : [lhs, rhs];\n}\n\nconst big0 = BigIntAvailable ? BigInt(0) : 0;\nconst isNaNFast = (value: any) => value !== value;\n\n/** @ignore */\nexport function createElementComparator(search: any) {\n    let typeofSearch = typeof search;\n    // Compare primitives\n    if (typeofSearch !== 'object' || search === null) {\n        // Compare NaN\n        if (isNaNFast(search)) {\n            return isNaNFast;\n        }\n        return typeofSearch !== 'bigint'\n            ? (value: any) => value === search\n            : (value: any) => (big0 + value) === search;\n    }\n    // Compare Dates\n    if (search instanceof Date) {\n        const valueOfSearch = search.valueOf();\n        return (value: any) => value instanceof Date ? (value.valueOf() === valueOfSearch) : false;\n    }\n    // Compare TypedArrays\n    if (ArrayBuffer.isView(search)) {\n        return (value: any) => value ? compareArrayLike(search, value) : false;\n    }\n    // Compare Maps and Rows\n    if (search instanceof Map) { return creatMapComparator(search); }\n    // Compare Array-likes\n    if (Array.isArray(search)) { return createArrayLikeComparator(search); }\n    // Compare Vectors\n    if (search instanceof Vector) { return createVectorComparator(search); }\n    // Compare non-empty Objects\n    return createObjectComparator(search);\n}\n\n/** @ignore */\nfunction createArrayLikeComparator(lhs: ArrayLike<any>) {\n    const comparators = [] as ((x: any) => boolean)[];\n    for (let i = -1, n = lhs.length; ++i < n;) {\n        comparators[i] = createElementComparator(lhs[i]);\n    }\n    return createSubElementsComparator(comparators);\n}\n\n/** @ignore */\nfunction creatMapComparator(lhs: Map<any, any>) {\n    let i = -1;\n    const comparators = [] as ((x: any) => boolean)[];\n    lhs.forEach((v) => comparators[++i] = createElementComparator(v));\n    return createSubElementsComparator(comparators);\n}\n\n/** @ignore */\nfunction createVectorComparator(lhs: Vector<any>) {\n    const comparators = [] as ((x: any) => boolean)[];\n    for (let i = -1, n = lhs.length; ++i < n;) {\n        comparators[i] = createElementComparator(lhs.get(i));\n    }\n    return createSubElementsComparator(comparators);\n}\n\n/** @ignore */\nfunction createObjectComparator(lhs: any) {\n    const keys = Object.keys(lhs);\n    // Only compare non-empty Objects\n    if (keys.length === 0) { return () => false; }\n    const comparators = [] as ((x: any) => boolean)[];\n    for (let i = -1, n = keys.length; ++i < n;) {\n        comparators[i] = createElementComparator(lhs[keys[i]]);\n    }\n    return createSubElementsComparator(comparators, keys);\n}\n\nfunction createSubElementsComparator(comparators: ((x: any) => boolean)[], keys?: Iterable<string>) {\n    return (rhs: any) => {\n        if (!rhs || typeof rhs !== 'object') {\n            return false;\n        }\n        switch (rhs.constructor) {\n            case Array: return compareArray(comparators, rhs);\n            case Map:\n            case MapRow:\n            case StructRow:\n                return compareObject(comparators, rhs, rhs.keys());\n            case Object:\n            case undefined: // support `Object.create(null)` objects\n                return compareObject(comparators, rhs, keys || Object.keys(rhs));\n        }\n        return rhs instanceof Vector ? compareVector(comparators, rhs) : false;\n    };\n}\n\nfunction compareArray(comparators: ((x: any) => boolean)[], arr: any[]) {\n    const n = comparators.length;\n    if (arr.length !== n) { return false; }\n    for (let i = -1; ++i < n;) {\n        if (!(comparators[i](arr[i]))) { return false; }\n    }\n    return true;\n}\n\nfunction compareVector(comparators: ((x: any) => boolean)[], vec: Vector) {\n    const n = comparators.length;\n    if (vec.length !== n) { return false; }\n    for (let i = -1; ++i < n;) {\n        if (!(comparators[i](vec.get(i)))) { return false; }\n    }\n    return true;\n}\n\nfunction compareObject(comparators: ((x: any) => boolean)[], obj: Map<any, any>, keys: Iterable<string>) {\n\n    const lKeyItr = keys[Symbol.iterator]();\n    const rKeyItr = obj instanceof Map ? obj.keys() : Object.keys(obj)[Symbol.iterator]();\n    const rValItr = obj instanceof Map ? obj.values() : Object.values(obj)[Symbol.iterator]();\n\n    let i = 0;\n    let n = comparators.length;\n    let rVal = rValItr.next();\n    let lKey = lKeyItr.next();\n    let rKey = rKeyItr.next();\n\n    for (; i < n && !lKey.done && !rKey.done && !rVal.done;\n         ++i, lKey = lKeyItr.next(), rKey = rKeyItr.next(), rVal = rValItr.next()) {\n        if (lKey.value !== rKey.value || !comparators[i](rVal.value)) {\n            break;\n        }\n    }\n    if (i === n && lKey.done && rKey.done && rVal.done) {\n        return true;\n    }\n    lKeyItr.return && lKeyItr.return();\n    rKeyItr.return && rKeyItr.return();\n    rValItr.return && rValItr.return();\n    return false;\n}\n"]}