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fix(codemode): align array callback behavior (#36584)

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Aiden Cline 2026-07-13 00:34:18 -05:00 • committed by GitHub
commit 828a4b3f15
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3 changed files with 77 additions and 22 deletions
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43
packages/codemode/src/interpreter/methods.ts
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@ -727,16 +727,16 @@ const invokeArrayMethod = <R>(
}
return undefined
case "reduce": {
let accumulator: unknown
let start: number
if (args.length >= 2) {
accumulator = args[1]
start = 0
} else {
if (length === 0)
throw new InterpreterRuntimeError("Array.reduce of an empty array with no initial value.", node)
accumulator = target[0]
start = 1
let start = 0
let accumulator = args[1]
if (args.length < 2) {
while (start < length && !(start in target)) start += 1
if (start === length)
throw new InterpreterRuntimeError("Array.reduce of an empty array with no initial value.", node).as(
"TypeError",
)
accumulator = target[start]
start += 1
}
for (let index = start; index < length; index += 1) {
if (!(index in target)) continue
@ -745,16 +745,16 @@ const invokeArrayMethod = <R>(
return accumulator
}
case "reduceRight": {
let accumulator: unknown
let start: number
if (args.length >= 2) {
accumulator = args[1]
start = length - 1
} else {
if (length === 0)
throw new InterpreterRuntimeError("Array.reduceRight of an empty array with no initial value.", node)
accumulator = target[length - 1]
start = length - 2
let start = length - 1
let accumulator = args[1]
if (args.length < 2) {
while (start >= 0 && !(start in target)) start -= 1
if (start < 0)
throw new InterpreterRuntimeError("Array.reduceRight of an empty array with no initial value.", node).as(
"TypeError",
)
accumulator = target[start]
start -= 1
}
for (let index = start; index >= 0; index -= 1) {
if (!(index in target)) continue
@ -764,7 +764,8 @@ const invokeArrayMethod = <R>(
}
case "findLast":
for (let index = length - 1; index >= 0; index -= 1) {
if (yield* apply([target[index], index, target])) return target[index]
const item = target[index]
if (yield* apply([item, index, target])) return item
}
return undefined
case "findLastIndex":