60 lines
1.6 KiB
Plaintext
60 lines
1.6 KiB
Plaintext
'use strict';
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var $TypeError = require('es-errors/type');
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var Call = require('es-abstract/2023/Call');
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var GetIteratorDirect = require('../aos/GetIteratorDirect');
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var IsCallable = require('es-abstract/2023/IsCallable');
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var IteratorClose = require('../aos/IteratorClose');
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var IteratorStepValue = require('../aos/IteratorStepValue');
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var NormalCompletion = require('es-abstract/2023/NormalCompletion');
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var ThrowCompletion = require('es-abstract/2023/ThrowCompletion');
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var ToBoolean = require('es-abstract/2023/ToBoolean');
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var Type = require('es-abstract/2023/Type');
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module.exports = function find(predicate) {
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if (this instanceof find) {
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throw new $TypeError('`find` is not a constructor');
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}
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var O = this; // step 1
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if (Type(O) !== 'Object') {
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throw new $TypeError('`this` value must be an Object'); // step 2
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}
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if (!IsCallable(predicate)) {
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throw new $TypeError('`predicate` must be a function'); // step 3
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}
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var iterated = GetIteratorDirect(O); // step 4
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var counter = 0; // step 5
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// eslint-disable-next-line no-constant-condition
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while (true) { // step 6
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var value = IteratorStepValue(iterated); // step 6.a
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if (iterated['[[Done]]']) {
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return void undefined; // step 6.b
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}
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var result;
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try {
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result = Call(predicate, void undefined, [value, counter]); // step 6.c
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} catch (e) {
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// close iterator // step 6.d
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IteratorClose(
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iterated,
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ThrowCompletion(e)
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);
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} finally {
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counter += 1; // step 6.f
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}
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if (ToBoolean(result)) {
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return IteratorClose(
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iterated,
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NormalCompletion(value)
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); // step 6.e
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}
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}
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};
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