Returns true
if the given string is a palindrome, false
otherwise.
Convert the string to String.prototype.toLowerCase()
and use String.prototype.replace()
to remove non-alphanumeric characters from it.
Then, use the spread operator (...
) to split the string into individual characters, Array.prototype.reverse()
, String.prototype.join('')
and compare it to the original, unreversed string, after converting it to String.prototype.toLowerCase()
.
代码片段
const palindrome = str => {
const s = str.toLowerCase().replace(/[\W_]/g, '');
return s === [...s].reverse().join('');
};
使用样例
palindrome('taco cat'); // true