Regex Password Validation

Author: dwqs

codewars/regexp-password-validation.md

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+#Description
+
+You need to write regex that will validate a password to make sure it meets the following criteria:
+
+* At least six characters long
+* contains a lowercase letter
+* contains an uppercase letter
+* contains a number
+
+Valid passwords will only be alphanumeric characters.
+
+**Kata's link**: [Regex Password Validation](https://www.codewars.com/kata/regex-password-validation/)
+
+#Best Practices
+
+**First:**
+```
+function validate(password) {
+ return /^(?=.*\d)(?=.*[a-z])(?=.*[A-Z])[a-zA-Z0-9]{6,}$/.test(password);
+}
+```
+
+**Second:**
+```
+function validate(password) {
+ return /^[A-Za-z0-9]{6,}$/.test(password) &&
+ /[A-Z]+/ .test(password) &&
+ /[a-z]+/ .test(password) &&
+ /[0-9]+/ .test(password) ;
+}
+```