dwqs / codewars-practices

Some best practices for practice questions on codewars, update it weekly

Codewars Practices

Some best practices for practice questions on codewars and try to update it weekly from Jul 16, 2018.

Notes: The best practices for every question I have passed all tests on codewars were sorted via votes count descending at the time I resolved it, so you maybe see different results now for the same question on codewars.

Here is my codewars homepage: https://www.codewars.com/users/dwqs.

Lists

2018-08

• Twice linear

2018-07

• parseInt reloaded
• Return substring instance count
• Simple Pig Latin
• Weight for weight
• Valid Parentheses

2017-02

• Regex Password Validation

2017-01

• Find Unique Number

2015-12

• Sum of many ints
• Palindrome for your Dome
• Array Helpers
• Who likes it?
• Create Phone Number
• Sometimes
• Adding ordinal indicator suffixes to numbers
• Count IP Addresses

codewars-practices's Issues

Third solution

The third solution doesn't work for "()()()((".
Expected false got undefined.
Fixed solution:
function validParentheses(parens){
var n = 0;
for (var i = 0; i < parens.length; i++) {
if (parens[i] == '(') n++;
if (parens[i] == ')') n--;
if (n < 0) return false;
}

if (n === 0) {
return true;
}
if (n > 0) {    // Have to return something when n > 0.
    return false;
}

}

Shortest

return str.replace(/(\w)(\w*)(\s|$)/g, "$2$1ay$3")