Sum of array, fetched data from database

I used json to send prices over.
How do i sum all the numbers in this array?

 arr[i].itemPrice

I have tried this but i am only getting the second value and not the total

for (var i =0; i<arr.length;i++){

sum += arr[i].itemPrice;

alert(sum);

}

edited Nov 25 '18 at 13:06

Joe C

11.7k62543

asked Nov 25 '18 at 13:01

bobby

367

1

Please be careful with how you tag your question. If your question is about javascript, there is little benefit to you in attracting java experts to your question.

– Joe C
Nov 25 '18 at 13:06

1

You can move alert outside the loop

– Nitish Narang
Nov 25 '18 at 13:09

add a comment |

I used json to send prices over.
How do i sum all the numbers in this array?

 arr[i].itemPrice

I have tried this but i am only getting the second value and not the total

for (var i =0; i<arr.length;i++){

sum += arr[i].itemPrice;

alert(sum);

}

edited Nov 25 '18 at 13:06

Joe C

11.7k62543

asked Nov 25 '18 at 13:01

bobby

367

1

Please be careful with how you tag your question. If your question is about javascript, there is little benefit to you in attracting java experts to your question.

– Joe C
Nov 25 '18 at 13:06

1

You can move alert outside the loop

– Nitish Narang
Nov 25 '18 at 13:09

add a comment |

I used json to send prices over.
How do i sum all the numbers in this array?

 arr[i].itemPrice

I have tried this but i am only getting the second value and not the total

for (var i =0; i<arr.length;i++){

sum += arr[i].itemPrice;

alert(sum);

}

edited Nov 25 '18 at 13:06

Joe C

11.7k62543

asked Nov 25 '18 at 13:01

bobby

367

I used json to send prices over.
How do i sum all the numbers in this array?

 arr[i].itemPrice

I have tried this but i am only getting the second value and not the total

for (var i =0; i<arr.length;i++){

sum += arr[i].itemPrice;

alert(sum);

}

javascript arrays

edited Nov 25 '18 at 13:06

Joe C

11.7k62543

asked Nov 25 '18 at 13:01

bobby

367

edited Nov 25 '18 at 13:06

Joe C

11.7k62543

asked Nov 25 '18 at 13:01

bobby

367

edited Nov 25 '18 at 13:06

Joe C

11.7k62543

edited Nov 25 '18 at 13:06

Joe C

11.7k62543

edited Nov 25 '18 at 13:06

Joe C

11.7k62543

asked Nov 25 '18 at 13:01

bobby

367

asked Nov 25 '18 at 13:01

bobby

367

asked Nov 25 '18 at 13:01

bobby

367

1

Please be careful with how you tag your question. If your question is about javascript, there is little benefit to you in attracting java experts to your question.

– Joe C
Nov 25 '18 at 13:06

1

You can move alert outside the loop

– Nitish Narang
Nov 25 '18 at 13:09

add a comment |

1

Please be careful with how you tag your question. If your question is about javascript, there is little benefit to you in attracting java experts to your question.

– Joe C
Nov 25 '18 at 13:06

1

You can move alert outside the loop

– Nitish Narang
Nov 25 '18 at 13:09

Please be careful with how you tag your question. If your question is about javascript, there is little benefit to you in attracting java experts to your question.

– Joe C
Nov 25 '18 at 13:06

You can move alert outside the loop

– Nitish Narang
Nov 25 '18 at 13:09

add a comment |

4 Answers
4

active

oldest

votes

You can use the Array's reduce function (ES6):

const sum = arr.reduce((acc, el) => acc + el.itemPrice, 0);

The reduce function allows you to iterate over a collection and accumulate the elements data however you'd like.

answered Nov 25 '18 at 13:03

Gilad Bar

753314

The numbers i have are 78.00 and 80.00. But it comes out as 078.0080.00, any idea why?

– bobby
Nov 25 '18 at 13:12

Are the numbers saved as strings? Because it looks like string concatenation

– Gilad Bar
Nov 25 '18 at 13:14

If it's a string, you can change el.itemPrice to Number(el.itemPrice)

– Nitish Narang
Nov 25 '18 at 13:16

It works now thank you!

– bobby
Nov 25 '18 at 13:18

add a comment |

Use the following :

for (var i = 0; i < arr.length; i++) {

   sum += arr[i].itemPrice;

}

alert(sum);

Alert the sum after the loop completes.

answered Nov 25 '18 at 13:03

Nicholas K

7,76661537

add a comment |

Looks like your array is something like below , you can use Array.reduce for this

let arr = [{ itemPrice: 1}, { itemPrice: 2}, { itemPrice: 3}]



console.log(arr.reduce((a, {itemPrice}) => a + itemPrice, 0))

answered Nov 25 '18 at 13:08

Nitish Narang

2,9601815

add a comment |

Use Array#reduce

const data = [{itemPrice:20.00}, {itemPrice:15.00}, {itemPrice:25.00}];



const total = data.reduce((sum, {itemPrice})=>sum+itemPrice, 0);



console.log(total);

answered Nov 25 '18 at 13:10

kemicofa

10.7k43984

add a comment |

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4 Answers
4

active

oldest

votes

4 Answers
4

active

oldest

votes

You can use the Array's reduce function (ES6):

const sum = arr.reduce((acc, el) => acc + el.itemPrice, 0);

The reduce function allows you to iterate over a collection and accumulate the elements data however you'd like.

answered Nov 25 '18 at 13:03

Gilad Bar

753314

The numbers i have are 78.00 and 80.00. But it comes out as 078.0080.00, any idea why?

– bobby
Nov 25 '18 at 13:12

Are the numbers saved as strings? Because it looks like string concatenation

– Gilad Bar
Nov 25 '18 at 13:14

If it's a string, you can change el.itemPrice to Number(el.itemPrice)

– Nitish Narang
Nov 25 '18 at 13:16

It works now thank you!

– bobby
Nov 25 '18 at 13:18

add a comment |

You can use the Array's reduce function (ES6):

const sum = arr.reduce((acc, el) => acc + el.itemPrice, 0);

The reduce function allows you to iterate over a collection and accumulate the elements data however you'd like.

answered Nov 25 '18 at 13:03

Gilad Bar

753314

The numbers i have are 78.00 and 80.00. But it comes out as 078.0080.00, any idea why?

– bobby
Nov 25 '18 at 13:12

Are the numbers saved as strings? Because it looks like string concatenation

– Gilad Bar
Nov 25 '18 at 13:14

If it's a string, you can change el.itemPrice to Number(el.itemPrice)

– Nitish Narang
Nov 25 '18 at 13:16

It works now thank you!

– bobby
Nov 25 '18 at 13:18

add a comment |

You can use the Array's reduce function (ES6):

const sum = arr.reduce((acc, el) => acc + el.itemPrice, 0);

The reduce function allows you to iterate over a collection and accumulate the elements data however you'd like.

answered Nov 25 '18 at 13:03

Gilad Bar

753314

You can use the Array's reduce function (ES6):

const sum = arr.reduce((acc, el) => acc + el.itemPrice, 0);

The reduce function allows you to iterate over a collection and accumulate the elements data however you'd like.

answered Nov 25 '18 at 13:03

Gilad Bar

753314

answered Nov 25 '18 at 13:03

Gilad Bar

753314

answered Nov 25 '18 at 13:03

Gilad Bar

753314

answered Nov 25 '18 at 13:03

Gilad Bar

753314

The numbers i have are 78.00 and 80.00. But it comes out as 078.0080.00, any idea why?

– bobby
Nov 25 '18 at 13:12

Are the numbers saved as strings? Because it looks like string concatenation

– Gilad Bar
Nov 25 '18 at 13:14

If it's a string, you can change el.itemPrice to Number(el.itemPrice)

– Nitish Narang
Nov 25 '18 at 13:16

It works now thank you!

– bobby
Nov 25 '18 at 13:18

add a comment |

The numbers i have are 78.00 and 80.00. But it comes out as 078.0080.00, any idea why?

– bobby
Nov 25 '18 at 13:12

Are the numbers saved as strings? Because it looks like string concatenation

– Gilad Bar
Nov 25 '18 at 13:14

If it's a string, you can change el.itemPrice to Number(el.itemPrice)

– Nitish Narang
Nov 25 '18 at 13:16

It works now thank you!

– bobby
Nov 25 '18 at 13:18

The numbers i have are 78.00 and 80.00. But it comes out as 078.0080.00, any idea why?

– bobby
Nov 25 '18 at 13:12

Are the numbers saved as strings? Because it looks like string concatenation

– Gilad Bar
Nov 25 '18 at 13:14

If it's a string, you can change el.itemPrice to Number(el.itemPrice)

– Nitish Narang
Nov 25 '18 at 13:16

It works now thank you!

– bobby
Nov 25 '18 at 13:18

add a comment |

Use the following :

for (var i = 0; i < arr.length; i++) {

   sum += arr[i].itemPrice;

}

alert(sum);

Alert the sum after the loop completes.

answered Nov 25 '18 at 13:03

Nicholas K

7,76661537

add a comment |

Use the following :

for (var i = 0; i < arr.length; i++) {

   sum += arr[i].itemPrice;

}

alert(sum);

Alert the sum after the loop completes.

answered Nov 25 '18 at 13:03

Nicholas K

7,76661537

add a comment |

Use the following :

for (var i = 0; i < arr.length; i++) {

   sum += arr[i].itemPrice;

}

alert(sum);

Alert the sum after the loop completes.

answered Nov 25 '18 at 13:03

Nicholas K

7,76661537

Use the following :

for (var i = 0; i < arr.length; i++) {

   sum += arr[i].itemPrice;

}

alert(sum);

Alert the sum after the loop completes.

answered Nov 25 '18 at 13:03

Nicholas K

7,76661537

answered Nov 25 '18 at 13:03

Nicholas K

7,76661537

answered Nov 25 '18 at 13:03

Nicholas K

7,76661537

answered Nov 25 '18 at 13:03

Nicholas K

7,76661537

add a comment |

Looks like your array is something like below , you can use Array.reduce for this

let arr = [{ itemPrice: 1}, { itemPrice: 2}, { itemPrice: 3}]



console.log(arr.reduce((a, {itemPrice}) => a + itemPrice, 0))

answered Nov 25 '18 at 13:08

Nitish Narang

2,9601815

add a comment |

Looks like your array is something like below , you can use Array.reduce for this

let arr = [{ itemPrice: 1}, { itemPrice: 2}, { itemPrice: 3}]



console.log(arr.reduce((a, {itemPrice}) => a + itemPrice, 0))

answered Nov 25 '18 at 13:08

Nitish Narang

2,9601815

add a comment |

Looks like your array is something like below , you can use Array.reduce for this

let arr = [{ itemPrice: 1}, { itemPrice: 2}, { itemPrice: 3}]



console.log(arr.reduce((a, {itemPrice}) => a + itemPrice, 0))

answered Nov 25 '18 at 13:08

Nitish Narang

2,9601815

Looks like your array is something like below , you can use Array.reduce for this

let arr = [{ itemPrice: 1}, { itemPrice: 2}, { itemPrice: 3}]



console.log(arr.reduce((a, {itemPrice}) => a + itemPrice, 0))

let arr = [{ itemPrice: 1}, { itemPrice: 2}, { itemPrice: 3}]



console.log(arr.reduce((a, {itemPrice}) => a + itemPrice, 0))

let arr = [{ itemPrice: 1}, { itemPrice: 2}, { itemPrice: 3}]



console.log(arr.reduce((a, {itemPrice}) => a + itemPrice, 0))

answered Nov 25 '18 at 13:08

Nitish Narang

2,9601815

answered Nov 25 '18 at 13:08

Nitish Narang

2,9601815

answered Nov 25 '18 at 13:08

Nitish Narang

2,9601815

answered Nov 25 '18 at 13:08

Nitish Narang

2,9601815

add a comment |

Use Array#reduce

const data = [{itemPrice:20.00}, {itemPrice:15.00}, {itemPrice:25.00}];



const total = data.reduce((sum, {itemPrice})=>sum+itemPrice, 0);



console.log(total);

answered Nov 25 '18 at 13:10

kemicofa

10.7k43984

add a comment |

Use Array#reduce

const data = [{itemPrice:20.00}, {itemPrice:15.00}, {itemPrice:25.00}];



const total = data.reduce((sum, {itemPrice})=>sum+itemPrice, 0);



console.log(total);

answered Nov 25 '18 at 13:10

kemicofa

10.7k43984

add a comment |

Use Array#reduce

const data = [{itemPrice:20.00}, {itemPrice:15.00}, {itemPrice:25.00}];



const total = data.reduce((sum, {itemPrice})=>sum+itemPrice, 0);



console.log(total);

answered Nov 25 '18 at 13:10

kemicofa

10.7k43984

Use Array#reduce

const data = [{itemPrice:20.00}, {itemPrice:15.00}, {itemPrice:25.00}];



const total = data.reduce((sum, {itemPrice})=>sum+itemPrice, 0);



console.log(total);

const data = [{itemPrice:20.00}, {itemPrice:15.00}, {itemPrice:25.00}];



const total = data.reduce((sum, {itemPrice})=>sum+itemPrice, 0);



console.log(total);

const data = [{itemPrice:20.00}, {itemPrice:15.00}, {itemPrice:25.00}];



const total = data.reduce((sum, {itemPrice})=>sum+itemPrice, 0);



console.log(total);

answered Nov 25 '18 at 13:10

kemicofa

10.7k43984

answered Nov 25 '18 at 13:10

kemicofa

10.7k43984

answered Nov 25 '18 at 13:10

kemicofa

10.7k43984

answered Nov 25 '18 at 13:10

kemicofa

10.7k43984

add a comment |

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