如何从数组项中删除字符？

Question

I have a function which generate random poker hand and after that I want to delete all the suits and just leave numbers to the array. What is the easiest way to do that? I have tried different things without any good results.

For example array could be something like this:

test = ["5♥","7♦","6♠","9♥","10♣"];

but I want it to be like this:

test = ["5","7","6","9","10"];

I wanna emphasize that in this case I have no idea what kind of array it would be when the function generate the array and delete the suits.

Thank you for your help!

Answer 1

You can use map() and use slice() to remove the last element of string.

 const test = ["5♥","7♦","6♠","9♥","10♣"]; const res = test.map(x => x.slice(0,-1)); console.log(res) 

Answer 2

You could remove the last character of each string.

 let test = ["5♥","7♦","6♠","9♥","10♣"]; let out = test.map(a => a.slice(0, -1)); console.log(out); 

Answer 3

You can use regex ,

 let test = ["5♥","7♦","6♠","9♥","10♣"]; console.log(test.map(str => str.replace(/.$/, '')));