如何在JavaScript的String中存在的变量中标识和存储数字？

Question

let's say i have a string in format like
1." Amount is between 5000 and 10000 "
2. " Amountbetween5000 and10000 "
3." 5000 Amountbetweenand10000 "
4." 50001000 amount "

then i need to store 5000 and 10000 in 2 variables let's say a and b
if no number found then value of a and b will be 0
string can or cannot have space between Words

Answer 1

You can use Regular Expressions

var numbers = string.match(/\d+/g).map(Number);

\\d+ matches a digit (equal to [0-9])

+ Quantifier — Matches between one and unlimited times, as many times as possible, giving back as needed (greedy)

g modifier: global. All matches (don't return after first match)

Here in example, handled case if no match is found.

 var string = "Amount is between 5000 and 10000", numbers = []; var arr = string.match(/\\d+/g); if (arr != null) numbers = arr.map(Number) console.log(numbers);