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LengthOfLastWord.js
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LengthOfLastWord.js
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/**
* Given a string s consists of upper/lower-case alphabets and empty space characters ' ', return the length of last word in the string.
* If the last word does not exist, return 0.
* Note: A word is defined as a character sequence consists of non-space characters only.
* For example,
* Given s = "Hello World",
* return 5.
*
* Accepted.
*/
/**
* @param {string} s
* @return {number}
*/
let lengthOfLastWord = function (s) {
if (s === null || s.length === 0) {
return 0;
}
let strs = s.split(new RegExp(" ")).filter(function (it) {
return it.length !== 0
});
if (strs.length === 0) {
return 0;
}
return strs[strs.length - 1].length;
};
if (lengthOfLastWord("Hello World") === 5) {
console.log("pass")
} else {
console.error("failed")
}
if (lengthOfLastWord(" ") === 0) {
console.log("pass")
} else {
console.error("failed")
}
if (lengthOfLastWord("a") === 1) {
console.log("pass")
} else {
console.error("failed")
}
if (lengthOfLastWord("a ") === 1) {
console.log("pass")
} else {
console.error("failed")
}