StringManipulator

function solve(input) {
    let string = input.shift();

    let translate = (string, obj, replacement) => {
        let rgx = new RegExp(obj, 'g');
        string = string.replace(rgx, replacement);
        console.log(string);
        return string;
    }
    let includes = (string, command) => {
        if(string.includes(command[1])){
            console.log('True');
        }
        else{
            console.log('False');
        }
        return string;
    }
    let start = (string, command) => {
        if(string.startsWith(command[1])){
            console.log('True');
        }
        else{
            console.log('False');
        }
        return string;
    }
    let lowerCase = (string) => {
        string = string.toLowerCase();
        console.log(string);
        return string;
    }
    let findIndex = (string,command) => {
        console.log(string.lastIndexOf(command[1]));
        return string;
    }
    let remove = (string) => {
        string = string.split('');
        let startIndex = Number(command[1]);
        let count =  Number(command[2]);
        string.splice(startIndex, count);
        console.log(string.join(''));
        return string;
    }
    let command ='';
    for (let i = 0; i < input.length-1; i ++) {
        command = input[i].split(' ');
        let obj = command[1];
        let replacement = command[2];
        if (command.includes('Translate')) {
            translate(string, obj, replacement);
        }
        else if(command.includes('Includes')){
            includes(string, command);
        }
        else if(command.includes('Start')) {
            start(string, command);
        }
        else if(command.includes('Lowercase')){
            lowerCase(string);
        }
        else if(command.includes('FindIndex')){
            findIndex(string, command);
//            Find the all indeces where {char} occurs, then print them separated by a space. If no occurences - print "None".
        }
        else if(command.includes('Remove')) {
            remove(string, command);
        }
    }
    return string;
}

solve([
  '//Thi5 I5 MY 5trING!//',
  'Translate 5 s',
  'Includes string',
  'Start //This',
  'Lowercase',
  'FindIndex i',
  'Remove 0 10',
  'End'
]
);