code-golfing.md

Code golfing

According to wikipedia:

Code golf is a type of recreational computer programming competition in which participants strive to achieve the shortest possible source code that implements a certain algorithm.

Tips in JS

Casting

To cast a string into an integer you can divide by one:

input="2";
console.log(input / 1 + 2); //will print 4
console.log(input + 2); //will print 22

Use print instead of console.log

print("test"); //shorter than console.log("test")

Tagged templates

You can cleverly use tag templates to save a few characters when calling functions with string parameters:

r="string".split``; //equivalent to "string".split("")
print(r); //(6) ["s", "t", "r", "i", "n", "g"]

Saving readline if used several times (or other functions)

readline is 8 characters long. If you need to use it more than twice, save it in a variable:

r=readline;
a=r();
b=r();

You can also save a series of calls:

r=()=>readline().split` `;
a=r();
b=r();