js 正则表达式

Question

In this kata we want to convert a string into an integer. The strings simply represent the numbers in words.

Examples:

"one" => 1
"twenty" => 20
"two hundred forty-six" => 246
"seven hundred eighty-three thousand nine hundred and nineteen" => 783919
Additional Notes:

The minimum number is "zero" (inclusively)
The maximum number, which must be supported is 1 million (inclusively)
The "and" in e.g. "one hundred and twenty-four" is optional, in some cases it's present and in others it's not
All tested numbers are valid, you don't need to validate them

这个题目谁能给个思路啊？不知从何下手。

Answer 1

感觉题目已经揭示了思路...
我这样想的，先用正则匹配如下部分：
" "
"-"
"and"
"hundred"
"thousand"
"million"
"billion"

然后找数字部分拼出来