Method _defineIdxProperty

array_sparse.go:339–374

(idx uint32, desc PropertyDescriptor, throw bool)

}

func (a *sparseArrayObject) _defineIdxProperty(idx uint32, desc PropertyDescriptor, throw bool) bool {
	var existing Value
	i := a.findIdx(idx)
	if i < len(a.items) && a.items[i].idx == idx {
		existing = a.items[i].value
	}
	prop, ok := a.baseObject._defineOwnProperty(unistring.String(strconv.FormatUint(uint64(idx), 10)), existing, desc, throw)
	if ok {
		if idx >= a.length {
			if !a.setLengthInt(idx+1, throw) {
				return false
			}
		}
		if i >= len(a.items) || a.items[i].idx != idx {
			if a.expand(idx) {
				a.items = append(a.items, sparseArrayItem{})
				copy(a.items[i+1:], a.items[i:])
				a.items[i] = sparseArrayItem{
					idx:   idx,
					value: prop,
				}
				if idx >= a.length {
					a.length = idx + 1
				}
			} else {
				a.val.self.(*arrayObject).values[idx] = prop
			}
		} else {
			a.items[i].value = prop
		}
		if _, ok := prop.(*valueProperty); ok {
			a.propValueCount++
		}
	}
	return ok
}

func (a *sparseArrayObject) defineOwnPropertyStr(name unistring.String, descr PropertyDescriptor, throw bool) bool {
	if idx := strToArrayIdx(name); idx != math.MaxUint32 {