51 lines
1.5 KiB
JavaScript
51 lines
1.5 KiB
JavaScript
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import { isArray, isBigNumber, isMatrix, isNumber, isRange } from '../../utils/is.js';
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import { factory } from '../../utils/factory.js';
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var name = 'index';
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var dependencies = ['Index'];
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export var createIndexTransform = /* #__PURE__ */factory(name, dependencies, _ref => {
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var {
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Index
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} = _ref;
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/**
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* Attach a transform function to math.index
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* Adds a property transform containing the transform function.
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*
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* This transform creates a one-based index instead of a zero-based index
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*/
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return function indexTransform() {
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var args = [];
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for (var i = 0, ii = arguments.length; i < ii; i++) {
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var arg = arguments[i]; // change from one-based to zero based, and convert BigNumber to number
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if (isRange(arg)) {
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arg.start--;
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arg.end -= arg.step > 0 ? 0 : 2;
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} else if (arg && arg.isSet === true) {
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arg = arg.map(function (v) {
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return v - 1;
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});
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} else if (isArray(arg) || isMatrix(arg)) {
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arg = arg.map(function (v) {
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return v - 1;
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});
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} else if (isNumber(arg)) {
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arg--;
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} else if (isBigNumber(arg)) {
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arg = arg.toNumber() - 1;
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} else if (typeof arg === 'string') {// leave as is
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} else {
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throw new TypeError('Dimension must be an Array, Matrix, number, string, or Range');
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}
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args[i] = arg;
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}
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var res = new Index();
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Index.apply(res, args);
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return res;
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};
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}, {
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isTransformFunction: true
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});
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