[Leetcode] [JavaScript] Valid number

https://leetcode.com/problems/valid-number/

Valid number 

Validate if a given string is numeric.

Some Examples:
"0"=true
" 0.1 "=true
"abc"=false
"1 a"=false
"2e10"=true

Note:it is intended for the problem statement to be ambiguous. You should gather all requirements up front before implementing one.

Regular technology which strong

1 /**2 * @param {string} s3 * @return {Boolean}4  */5 varIsnumber =function(s) {6s =S.trim ();7     if(S!== "" &&/^[-+]? (\d+\.?| \.\d+) \d* ([e| e][-+]?\d+)? $/. Test (s)) {8         return true;9     }Ten     return false; One};

In the beginning, I did not think clearly, each one of the circumstances add an else, write a mess, and later found can be merged.

1 /*2 s = S.trim ();3 if (s = = = "") {4 return false;5 }else if (/^[-+]?[ e| E]/.test (s)) {6 return false;7 }else if (/^[-+]?0$/.test (s)) {8 return true;9 }else if (/^[-+]?[ 0-9]*$/.test (s)) {Ten return true; One }else if (/^[-+]?[ 0-9]+\. [0-9]*$/.test (s)) { A return true; - }else if (/^[-+]?[ 0-9]*\. [0-9]+$/.test (s)) { - return true; the }else if (/^[-+]?[ 0-9]*[e| E][-+]? [0-9]+$/.test (s)) { - return true; - }else if (/^[-+]? ( [0-9]+\. [0-9]*] [e| E][-+]? [0-9]+$/.test (s)) { - return true; + }else if (/^[-+]? ( [0-9]*\. [0-9]+] [e| E][-+]? [0-9]+$/.test (s)) { - return true; +     } A return false; at */

[Leetcode] [JavaScript] Valid number