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list of higher-order functions javascript

A “higher-order function” is a function that accepts functions as parameters and/or returns a function.

    Array Method .reduce() 
    Array Method .forEach() 
    Array Method .filter() 
    Array Method .map()
Comment

higher order function in javascript

//higher order function is just a function that take other function as a parameter
//example forEach

function repeater(fn){
fn(); fn(); fn();
}

function sayHello(){
console.log("Hello There!")
}
repeater(sayHello);//at console Hello There 3 times._
//repeater is higher order function that take sayHello as function parameter.
Comment

list of higher-order functions javascript

A “higher-order function” is a function that accepts functions as parameters and/or returns a function.

    Array Method .reduce() 
    Array Method .forEach() 
    Array Method .filter() 
    Array Method .map()
Comment

list of higher-order functions javascript

A “higher-order function” is a function that accepts functions as parameters and/or returns a function.

    Array Method . reduce() The . ...
    Array Method . forEach() The . ...
    Array Method .filter() The . filter() method executes a callback function on each element in an array. ...
    Array Method .map()
Comment

list of higher-order functions javascript

A “higher-order function” is a function that accepts functions as parameters and/or returns a function.

    Array Method .reduce() 
    Array Method .forEach() 
    Array Method .filter() 
    Array Method .map()
Comment

list of higher-order functions javascript

A “higher-order function” is a function that accepts functions as parameters and/or returns a function.

    Array Method .reduce() 
    Array Method .forEach() 
    Array Method .filter() 
    Array Method .map()
Comment

list of higher-order functions javascript

A “higher-order function” is a function that accepts functions as parameters and/or returns a function.

    Array Method . reduce() The . ...
    Array Method . forEach() The . ...
    Array Method .filter() The . filter() method executes a callback function on each element in an array. ...
    Array Method .map()
Comment

list of higher-order functions javascript

A “higher-order function” is a function that accepts functions as parameters and/or returns a function.

    Array Method .reduce() 
    Array Method .forEach() 
    Array Method .filter() 
    Array Method .map()
Comment

js higher order function examples

function copyArrayAndManipulate(array, instructions) {
  const output = []
  for(let i = 0; i < array.length; i++) {
    output.push(instructions(array[i]))
  }
  return output
}

function multiplyBy10(input) {
  return input * 10
}

copyArrayAndManipulate([1, 2, 3], multiplyBy10)
Comment

list of higher-order functions javascript

A “higher-order function” is a function that accepts functions as parameters and/or returns a function.

    Array Method .reduce() 
    Array Method .forEach() 
    Array Method .filter() 
    Array Method .map()
Comment

list of higher-order functions javascript

A “higher-order function” is a function that accepts functions as parameters and/or returns a function.

    Array Method . reduce() The . ...
    Array Method . forEach() The . ...
    Array Method .filter() The . filter() method executes a callback function on each element in an array. ...
    Array Method .map()
Comment

list of higher-order functions javascript

A “higher-order function” is a function that accepts functions as parameters and/or returns a function.

    Array Method . reduce() The . ...
    Array Method . forEach() The . ...
    Array Method .filter() The . filter() method executes a callback function on each element in an array. ...
    Array Method .map()
Comment

list of higher-order functions javascript

A “higher-order function” is a function that accepts functions as parameters and/or returns a function.

    Array Method . reduce() The . ...
    Array Method . forEach() The . ...
    Array Method .filter() The . filter() method executes a callback function on each element in an array. ...
    Array Method .map()
Comment

Understanding higher order JavaScript functions

function (n) => {
  unless(n%2 == 1, () => {
    console.log(`${n} is even`);
});
Comment

Higher order function javascript

//Syntactic Sugar for a ForEach loop below; this is part of a form validation
//and basicly goes through every element in the form and logs the id for said
//element. 

function checkRequired(inputArr) {
  //   		|   
  //?       V   High Order Array Method 
  inputArr.forEach(function (input) {
    console.log(input.id)  
  });
}

//! Event Listeners --> This is a higher order functon
form.addEventListener('submit', function (e) {
  e.preventDefault();
  //passing in array of arguments to be checked
  checkRequired([username, email, password, password2]); 
});
Comment

Understanding higher order JavaScript functions

function() => {
  console.log(`${n} is even`);
});
Comment

list of higher-order functions javascript

A “higher-order function” is a function that accepts functions as parameters and/or returns a function.

    Array Method .reduce() 
    Array Method .forEach() 
    Array Method .filter() 
    Array Method .map()
Comment

Understanding higher order JavaScript functions

repeat(3, n => {
  unless(n%2 == 1, () => {
    console.log(`${n} is even`);
  });
});
Comment

Understanding higher order JavaScript functions

function evenNumberFilter(number) {
  return number %2 == 0
}

function oddNumberFilter(number) {
  return !evenNumberFilter(number)
}

function filter(predicate) {
  const result = []
  for(number=0; number<10; number++) {
    if (predicate(number)) {
      result.push(number)
    }
  }
  return result
}

filter(evenNumberFilter);  //[0,2,4,6,8]
filter(oddNumberFilter);   //[1,3,5,7,9]
Comment

Understanding higher order JavaScript functions

function evenNumberFilter(number) {
  return number %2 == 0
}

function oddNumberFilter(number) {
  return !evenNumberFilter(number)
}

function evenNumberBeforeTen() {
  const result = []
  for(number=0; number<10; number++) {
    if (evenNumberFilter(number)) {
      result.push(number)
    }
  }
  return result
}

function oddNumberBeforeTen() {
  const result = []
  for(number=0; number<10; number++) {
    if (oddNumberFilter(number)) {
      result.push(number)
    }
  }
  return result
}

evenNumberBeforeTen();  //[0,2,4,6,8]
oddNumberBeforeTen();   //[1,3,5,7,9]
Comment

Understanding higher order JavaScript functions

function evenNumberFilter(number) {
  return number%2==0
}

function oddNumberFilter(number) {
  return !evenNumberFilter(number)
}

evenNumberFilter(2) // true
oddNumberFilter(3)  // true
Comment

list of higher-order functions javascript

A “higher-order function” is a function that accepts functions as parameters and/or returns a function.

    Array Method . reduce() The . ...
    Array Method . forEach() The . ...
    Array Method .filter() The . filter() method executes a callback function on each element in an array. ...
    Array Method .map()
Comment

list of higher-order functions javascript

A “higher-order function” is a function that accepts functions as parameters and/or returns a function.

    Array Method . reduce() The . ...
    Array Method . forEach() The . ...
    Array Method .filter() The . filter() method executes a callback function on each element in an array. ...
    Array Method .map()
Comment

list of higher-order functions javascript

A “higher-order function” is a function that accepts functions as parameters and/or returns a function.

    Array Method .reduce() 
    Array Method .forEach() 
    Array Method .filter() 
    Array Method .map()
Comment

list of higher-order functions javascript

A “higher-order function” is a function that accepts functions as parameters and/or returns a function.

    Array Method .reduce() 
    Array Method .forEach() 
    Array Method .filter() 
    Array Method .map()
Comment

list of higher-order functions javascript

A “higher-order function” is a function that accepts functions as parameters and/or returns a function.

    Array Method .reduce() 
    Array Method .forEach() 
    Array Method .filter() 
    Array Method .map()
Comment

list of higher-order functions javascript

A “higher-order function” is a function that accepts functions as parameters and/or returns a function.

    Array Method .reduce() 
    Array Method .forEach() 
    Array Method .filter() 
    Array Method .map()
Comment

list of higher-order functions javascript

A “higher-order function” is a function that accepts functions as parameters and/or returns a function.

    Array Method . reduce() The . ...
    Array Method . forEach() The . ...
    Array Method .filter() The . filter() method executes a callback function on each element in an array. ...
    Array Method .map()
Comment

list of higher-order functions javascript

A “higher-order function” is a function that accepts functions as parameters and/or returns a function.

    Array Method .reduce() 
    Array Method .forEach() 
    Array Method .filter() 
    Array Method .map()
Comment

list of higher-order functions javascript

A “higher-order function” is a function that accepts functions as parameters and/or returns a function.

    Array Method . reduce() The . ...
    Array Method . forEach() The . ...
    Array Method .filter() The . filter() method executes a callback function on each element in an array. ...
    Array Method .map()
Comment

list of higher-order functions javascript

A “higher-order function” is a function that accepts functions as parameters and/or returns a function.

    Array Method .reduce() 
    Array Method .forEach() 
    Array Method .filter() 
    Array Method .map()
Comment

list of higher-order functions javascript

A “higher-order function” is a function that accepts functions as parameters and/or returns a function.

    Array Method .reduce() 
    Array Method .forEach() 
    Array Method .filter() 
    Array Method .map()
Comment
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