将命名项目添加到列表时,是否保证该项目将添加到列表的末尾?在实践中似乎是这样,但不确定这是否是一个危险的假设?
test = list()
test[[ "one" ]] = 1
test[[ "two" ]] = 2 # will always appear after "one"?
test[[ "three" ]] = 3 # will always appear after "two"?
将命名项目添加到列表时,是否保证该项目将添加到列表的末尾?在实践中似乎是这样,但不确定这是否是一个危险的假设?
test = list()
test[[ "one" ]] = 1
test[[ "two" ]] = 2 # will always appear after "one"?
test[[ "three" ]] = 3 # will always appear after "two"?