Method _setOwnIdx

array.go:214–257

(idx uint32, val Value, throw bool)

}

func (a *arrayObject) _setOwnIdx(idx uint32, val Value, throw bool) bool {
	var prop Value
	if idx < uint32(len(a.values)) {
		prop = a.values[idx]
	}

	if prop == nil {
		if proto := a.prototype; proto != nil {
			// we know it's foreign because prototype loops are not allowed
			if res, ok := proto.self.setForeignIdx(valueInt(idx), val, a.val, throw); ok {
				return res
			}
		}
		// new property
		if !a.extensible {
			a.val.runtime.typeErrorResult(throw, "Cannot add property %d, object is not extensible", idx)
			return false
		} else {
			if idx >= a.length {
				if !a.setLengthInt(idx+1, throw) {
					return false
				}
			}
			if idx >= uint32(len(a.values)) {
				if !a.expand(idx) {
					a.val.self.(*sparseArrayObject).add(idx, val)
					return true
				}
			}
			a.objCount++
		}
	} else {
		if prop, ok := prop.(*valueProperty); ok {
			if !prop.isWritable() {
				a.val.runtime.typeErrorResult(throw)
				return false
			}
			prop.set(a.val, val)
			return true
		}
	}
	a.values[idx] = val
	return true
}

func (a *arrayObject) setOwnStr(name unistring.String, val Value, throw bool) bool {
	if idx := strToArrayIdx(name); idx != math.MaxUint32 {