I’m writing a program to guess input using JavaScript, and to do it I have to pick a random element from an array. However, after trying to debug it with Chrome DevTools, I found out that it’s returning the whole array instead of just the element. EDIT: I also made sure it had nothing to do with the method used to select a random element. Here’s some code:
var alphabet = ["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z","A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z","0","1","2","3","4","5","6","7","8","9","~","`","!","@","#","$","%","^","&","*","(",")","-","_","=","+","[","]","{","}","\","|",";",":","'",""",",","<",".",">","/","?"," "] var charset = []; if(document.getElementById("lowercase").checked){ charset.push(alphabet.slice(0, 26)); } if(document.getElementById("uppercase").checked){ charset.push(alphabet.slice(26, 52)); } if(document.getElementById("numbers").checked){ charset.push(alphabet.slice(52, 62)); } if(document.getElementById("special").checked){ charset.push(alphabet.slice(62, alphabet.length)); } var word = document.getElementById("input").value; var foundword = ""; while(true) { for(i = 0; i < word.length; i++) { foundword += charset[Math.floor(Math.random() * charset.length)]; } if(word == foundword) { alert("done"); break; } foundword = ""; }
Could anyone help? Thanks in advance!
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Answer
alphabet.slice
returns an array.
When you charset.push(alphabet.slice(.......))
you are pushing an array, so at the end charset
is an array of arrays.
You can use the spread operator – ...
– to have the pushed array converted to a series of values:
charset.push(...alphabet.slice(26, 52));
Just to help you get used to the syntax, here are a couple more examples:
let arr = alphabet.slice(26, 52); charset.push(...arr); charset.push(...['a', 'b', 'c']);