Closures, nested function - Javascript Function

Javascript examples for Function:Closure

  1. HOME
  2. Javascript
  3. Function
  4. Closure

Description

Closures, nested function

Demo Code


function showName(firstName){
  function buildStatement(statementEnding){
    return firstName + statementEnding;
  }//from   w  w w. j  a v  a2s . com

  return buildStatement;
}

console.log(showName('Dr. Livingstone'));

var statement = showName('Dr. Livingstone');
console.log(statement()); //Dr. Livingstone I presume

console.log(showName('Dora')(' the explorer'));


function add(number1){

  function secondAdd(number2){
    console.log("secondAdd: ", number1);
    return number1 + number2;
  }

  return secondAdd;
}

var addition = add(1);

addition();

var addition2 = add(5);

addition2();

addition();


// A simple function for expecting values
// Ex: expect(kepler.color).toBe('red'); // should return true
function expect(target) {
  return {
    toBe: function(expectation) {
      if (target === expectation) {
        console.log('\n     %cPASSED', 'color:green;', 'Expected', target, 'to be', expectation );
        return true;
      } else {
        console.log('\n     %cFAILED', 'color:red;', 'Expected', target, 'to be', expectation );
        return false;
      }
    }
  }
}

expect('red').toBe('black');


function celebrityIDCreator(theCelebrities){
  var i;
  var uniqueID = 100;

  for(i = 0; i < theCelebrities.length; i++){
    theCelebrities[i]["id"] = function(j){
      return uniqueID + j;
    }(i);
  }

  return theCelebrities;
}

var action = [{name: "Stallone", id:0}, {name: "Willis", id:0}];
var updatedCelebs = celebrityIDCreator(action);

console.log("stallone", updatedCelebs[0].id);
console.log("willis", updatedCelebs[1].id);

Related Tutorials