Simple transposition.js

/*
Description:
Simple transposition is a basic and simple cryptography technique. We make 2 rows and put first a letter in the Row 1, the second in the Row 2, third in Row 1 and so on until the end. Then we put the text from Row 2 next to the Row 1 text and thats it.

Complete the function that recieves a string and encrypt it with this simple transposition.

Example
For example if the text to encrypt is: "Simple text", the 2 rows will be:

Row 1	S	m	l		e	t
Row 2	i	p	e	t	x	

So the result string will be: `"Sml etipetx"`
*/
function simpleTransposition(text) {
  const row1=[];
  const row2=[];
  text.split(``).map((v,i)=>i%2===0?row1.push(v):row2.push(v))
  return row1.join(``)+row2.join(``)
}