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JavaScript: Create tomorrow's date in a string representation

JavaScript fundamental (ES6 Syntax): Exercise-119 with Solution

Write a JavaScript program to create tomorrow's date in a string representation.

  • Use new Date() to get the current date.
  • Increment it by one using Date.prototype.getDate() and set the value to the result using Date.prototype.setDate().
  • Use Date.prototype.toISOString() to return a string in yyyy-mm-dd format.

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2 
const tomorrow = (long = false) => {
  let t = new Date();
  t.setDate(t.getDate() + 1);
  const ret = `${t.getFullYear()}-${String(t.getMonth() + 1).padStart(2, '0')}-${String(
    t.getDate()
  ).padStart(2, '0')}`;
  return !long ? ret : `${ret}T00:00:00`;
};

console.log(tomorrow());
console.log(tomorrow(true));

Sample Output:

2018-08-17
2018-08-17T00:00:00

Pictorial Presentation:

JavaScript Fundamental: Create tomorrow's date in a string representation.

Flowchart:

flowchart: Create tomorrow's date in a string representation

Live Demo:

See the Pen javascript-basic-exercise-119-1 by w3resource (@w3resource) on CodePen.


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JavaScript: Tips of the Day

How to remove a specific item from an array?

Find the index of the array element you want to remove using indexOf, and then remove that index with splice.

The splice() method changes the contents of an array by removing existing elements and/or adding new elements.

const array = [2, 5, 9];

console.log(array);

const index = array.indexOf(5);
if (index > -1) {
  array.splice(index, 1);
}

// array = [2, 9]
console.log(array);

The second parameter of splice is the number of elements to remove. Note that splice modifies the array in place and returns a new array containing the elements that have been removed.

For the reason of completeness, here are functions. The first function removes only a single occurrence (i.e. removing the first match of 5 from [2,5,9,1,5,8,5]), while the second function removes all occurrences:

function removeItemOnce(arr, value) {
  var index = arr.indexOf(value);
  if (index > -1) {
    arr.splice(index, 1);
  }
  return arr;
}

function removeItemAll(arr, value) {
  var i = 0;
  while (i < arr.length) {
    if (arr[i] === value) {
      arr.splice(i, 1);
    } else {
      ++i;
    }
  }
  return arr;
}
//Usage
console.log(removeItemOnce([2,5,9,1,5,8,5], 5))
console.log(removeItemAll([2,5,9,1,5,8,5], 5))

Ref: https://bit.ly/2N9nKRp