Printing position (starting from 1) and the element item, for each element in the array-CodePudding

Given the array below, I want to print the position (starting with 1) and the element item, for each element in the array in a single line.

let bag = ""

let arr = [1, 2, 3, "Ram", 2, "Chris"];

for (let i = 1; i < arr.length; i  ) {
  if (arr[i]) {
    bag = bag   arr[i]   " ";
  }
}
console.log(bag);

I want the log given to be similar to this, having position starting from 1 and the item of that element, for each element in a single line.

1: 1. 2: 2. 3: 3. 4: Ram. 5: 2. 6: Chris

CodePudding user response：

The following solution makes use of the .map and .join methods on arrays:

let arr = [1, 2, 3, "Ram", 2, "Chris"];
console.log(arr.map(function(element, position) {
  return `${position   1}: ${element}`;
}).join(". "));

CodePudding user response：

Try this :

let str = '';

const arr = [1, 2, 3, "Ram", 2, "Chris"];

for (let i = 1; i < arr.length; i  ) {
  str  = (arr[i] && (i < arr.length - 1)) ? i   ': '   arr[i]   ', ' : i   ': '   arr[i]
}

console.log(str);

CodePudding user response：

You can do that with two ways, the regular way with loops, and the advanced way with methods:

With Loops:

let bag = ""
let arr = [1, 2, 3, "Ram", 2, "Chris"]
for (let pos in arr) {
    bag  = pos   ": "   arr[pos]
    if( pos != arr.length-1 ) bag  = ". "
}
console.log(bag)

With Methods:

let arr = [1, 2, 3, "Ram", 2, "Chris"]

let result = arr.map((item, pos) => {
  return `${pos}: ${item}${pos != arr.length-1 ? "." : ""}`
}).join(" ")

console.log( result )