78 lines
2.4 KiB
JavaScript
78 lines
2.4 KiB
JavaScript
'use strict';
|
|
|
|
var GetIntrinsic = require('get-intrinsic');
|
|
|
|
var AddValueToKeyedGroup = require('./AddValueToKeyedGroup');
|
|
var Call = require('es-abstract/2023/Call');
|
|
var GetIterator = require('es-abstract/2023/GetIterator');
|
|
var IsCallable = require('es-abstract/2023/IsCallable');
|
|
var IteratorClose = require('es-abstract/2023/IteratorClose');
|
|
var IteratorStep = require('es-abstract/2023/IteratorStep');
|
|
var IteratorValue = require('es-abstract/2023/IteratorValue');
|
|
var RequireObjectCoercible = require('es-abstract/2023/RequireObjectCoercible');
|
|
var ThrowCompletion = require('es-abstract/2023/ThrowCompletion');
|
|
var ToPropertyKey = require('es-abstract/2023/ToPropertyKey');
|
|
|
|
var maxSafeInteger = require('es-abstract/helpers/maxSafeInteger');
|
|
|
|
var $TypeError = GetIntrinsic('%TypeError%');
|
|
|
|
module.exports = function GroupBy(items, callbackfn, coercion) {
|
|
if (coercion !== 'property' && coercion !== 'zero') {
|
|
throw new $TypeError('Assertion failed: `coercion` must be `"property"` or `"zero"`');
|
|
}
|
|
|
|
RequireObjectCoercible(items); // step 1
|
|
|
|
if (!IsCallable(callbackfn)) { // step 2
|
|
throw new $TypeError('`callbackfn` must be callable');
|
|
}
|
|
|
|
var groups = []; // step 3
|
|
|
|
var iteratorRecord = GetIterator(items, 'sync'); // step 4
|
|
|
|
var k = 0; // step 5
|
|
|
|
// eslint-disable-next-line no-constant-condition
|
|
while (true) { // step 6
|
|
if (k >= maxSafeInteger) { // step 6.a
|
|
var error = ThrowCompletion(new $TypeError('Iteration count exceeds the max safe integer value')); // step 6.a.i
|
|
return IteratorClose(iteratorRecord, error); // step 6.a.ii
|
|
}
|
|
|
|
var next = IteratorStep(iteratorRecord); // step 6.b
|
|
if (!next) { // step 6.c
|
|
return groups; // step 6.c.i
|
|
}
|
|
|
|
var value = IteratorValue(next); // step 6.d
|
|
|
|
var key;
|
|
try {
|
|
key = Call(callbackfn, undefined, [value, k]); // step 6.e
|
|
} catch (e) {
|
|
IteratorClose(iteratorRecord, ThrowCompletion(e)); // step 6.f
|
|
}
|
|
|
|
if (coercion === 'property') { // step 6.g
|
|
try {
|
|
key = ToPropertyKey(key); // step 6.g.i
|
|
} catch (e) {
|
|
IteratorClose(iteratorRecord, ThrowCompletion(e)); // step 6.g.ii
|
|
}
|
|
} else {
|
|
if (coercion !== 'zero') {
|
|
throw new $TypeError('Assertion failed: `coercion` should be `"zero"` here'); // step 6.h.i
|
|
}
|
|
if (key === 0) { // step 6.h.ii
|
|
key = 0; // handle negative zero
|
|
}
|
|
}
|
|
|
|
AddValueToKeyedGroup(groups, key, value); // step 6.i
|
|
|
|
k += 1; // step 6.j
|
|
}
|
|
};
|