How to pick elements by array from array of object

up vote
0
down vote

favorite

I have an array of object, and I want to remove some elements like this.

var data = [a:1, b:2, c:3, d:4, a:11, b:22, c:33, d:44]
var saveByKeys = ['a', 'c']

The result I want is:

var reuslt = [a:1, c:3, a:11, c:33]

How to use lodash to do that? One-line would be better

edited Nov 11 at 12:14

Zoe

10.7k73575

asked Nov 11 at 12:05

jack ho

1

Which lodash methods did you try? The documents give examples for each method including ones that do what you are asking
– charlietfl
Nov 11 at 12:08

Welcome to SO. You might find reading the site help section useful when it comes to asking a good question. To get the best answers to your question we like to see a) that you've attempted to solve the problem yourself first, and b) used a Minimal, Complete, and Verifiable example to narrow down the problem. Asking SO to do all the work for you doesn't help you or us. Here's a question checklist you might find useful..
– Andy
Nov 11 at 12:18

add a comment |

up vote
0
down vote

favorite

I have an array of object, and I want to remove some elements like this.

var data = [a:1, b:2, c:3, d:4, a:11, b:22, c:33, d:44]
var saveByKeys = ['a', 'c']

The result I want is:

var reuslt = [a:1, c:3, a:11, c:33]

How to use lodash to do that? One-line would be better

edited Nov 11 at 12:14

Zoe

10.7k73575

asked Nov 11 at 12:05

jack ho

1

Which lodash methods did you try? The documents give examples for each method including ones that do what you are asking
– charlietfl
Nov 11 at 12:08

Welcome to SO. You might find reading the site help section useful when it comes to asking a good question. To get the best answers to your question we like to see a) that you've attempted to solve the problem yourself first, and b) used a Minimal, Complete, and Verifiable example to narrow down the problem. Asking SO to do all the work for you doesn't help you or us. Here's a question checklist you might find useful..
– Andy
Nov 11 at 12:18

add a comment |

up vote
0
down vote

favorite

I have an array of object, and I want to remove some elements like this.

var data = [a:1, b:2, c:3, d:4, a:11, b:22, c:33, d:44]
var saveByKeys = ['a', 'c']

The result I want is:

var reuslt = [a:1, c:3, a:11, c:33]

How to use lodash to do that? One-line would be better

edited Nov 11 at 12:14

Zoe

10.7k73575

asked Nov 11 at 12:05

jack ho

I have an array of object, and I want to remove some elements like this.

var data = [a:1, b:2, c:3, d:4, a:11, b:22, c:33, d:44]
var saveByKeys = ['a', 'c']

The result I want is:

var reuslt = [a:1, c:3, a:11, c:33]

How to use lodash to do that? One-line would be better

javascript functional-programming lodash

edited Nov 11 at 12:14

Zoe

10.7k73575

asked Nov 11 at 12:05

jack ho

edited Nov 11 at 12:14

Zoe

10.7k73575

asked Nov 11 at 12:05

jack ho

edited Nov 11 at 12:14

Zoe

10.7k73575

edited Nov 11 at 12:14

Zoe

10.7k73575

edited Nov 11 at 12:14

Zoe

10.7k73575

asked Nov 11 at 12:05

jack ho

asked Nov 11 at 12:05

jack ho

asked Nov 11 at 12:05

jack ho

1

Which lodash methods did you try? The documents give examples for each method including ones that do what you are asking
– charlietfl
Nov 11 at 12:08

Welcome to SO. You might find reading the site help section useful when it comes to asking a good question. To get the best answers to your question we like to see a) that you've attempted to solve the problem yourself first, and b) used a Minimal, Complete, and Verifiable example to narrow down the problem. Asking SO to do all the work for you doesn't help you or us. Here's a question checklist you might find useful..
– Andy
Nov 11 at 12:18

add a comment |

1

Which lodash methods did you try? The documents give examples for each method including ones that do what you are asking
– charlietfl
Nov 11 at 12:08

Welcome to SO. You might find reading the site help section useful when it comes to asking a good question. To get the best answers to your question we like to see a) that you've attempted to solve the problem yourself first, and b) used a Minimal, Complete, and Verifiable example to narrow down the problem. Asking SO to do all the work for you doesn't help you or us. Here's a question checklist you might find useful..
– Andy
Nov 11 at 12:18

Which lodash methods did you try? The documents give examples for each method including ones that do what you are asking
– charlietfl
Nov 11 at 12:08

Welcome to SO. You might find reading the site help section useful when it comes to asking a good question. To get the best answers to your question we like to see a) that you've attempted to solve the problem yourself first, and b) used a Minimal, Complete, and Verifiable example to narrow down the problem. Asking SO to do all the work for you doesn't help you or us. Here's a question checklist you might find useful..
– Andy
Nov 11 at 12:18

add a comment |

2 Answers
2

active

oldest

votes

up vote
1
down vote

You can use lodash's _.pick() with Array.map() (or lodash's _.map()):

const data = [a:1, b:2, c:3, d:4, a:11, b:22, c:33, d:44]
const saveByKeys = ['a', 'c']

const result = data.map(o => _.pick(o, saveByKeys))

console.log(result)

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.min.js"></script>

answered Nov 11 at 12:09

Ori Drori

71.6k127489

That's great, thanks a lot
– jack ho
Nov 11 at 12:11

add a comment |

up vote
0
down vote

If you want to avoid lodash this is how this would look like with ES6:

var data = [a:1, b:2, c:3, d:4, a:11, b:22, c:33, d:44]
var keys = ['a', 'c']

const pick = (obj, keys) => keys.reduce((r,c) => (r[c] = obj[c], r),)
console.log(data.map(x => pick(x, keys)))

edited Nov 11 at 23:43

answered Nov 11 at 20:06

Akrion

8,35411223

add a comment |

Your Answer

StackExchange.ifUsing("editor", function ()
StackExchange.using("externalEditor", function ()
StackExchange.using("snippets", function ()
StackExchange.snippets.init();
);
);
, "code-snippets");

StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "1"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);

else
createEditor();

);

function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);

);

draft saved

draft discarded

StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53248556%2fhow-to-pick-elements-by-array-from-array-of-object%23new-answer', 'question_page');

);

Post as a guest

Name

Required, but never shown

2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

up vote
1
down vote

You can use lodash's _.pick() with Array.map() (or lodash's _.map()):

const data = [a:1, b:2, c:3, d:4, a:11, b:22, c:33, d:44]
const saveByKeys = ['a', 'c']

const result = data.map(o => _.pick(o, saveByKeys))

console.log(result)

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.min.js"></script>

answered Nov 11 at 12:09

Ori Drori

71.6k127489

That's great, thanks a lot
– jack ho
Nov 11 at 12:11

add a comment |

up vote
1
down vote

You can use lodash's _.pick() with Array.map() (or lodash's _.map()):

const data = [a:1, b:2, c:3, d:4, a:11, b:22, c:33, d:44]
const saveByKeys = ['a', 'c']

const result = data.map(o => _.pick(o, saveByKeys))

console.log(result)

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.min.js"></script>

answered Nov 11 at 12:09

Ori Drori

71.6k127489

That's great, thanks a lot
– jack ho
Nov 11 at 12:11

add a comment |

up vote
1
down vote

You can use lodash's _.pick() with Array.map() (or lodash's _.map()):

const data = [a:1, b:2, c:3, d:4, a:11, b:22, c:33, d:44]
const saveByKeys = ['a', 'c']

const result = data.map(o => _.pick(o, saveByKeys))

console.log(result)

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.min.js"></script>

answered Nov 11 at 12:09

Ori Drori

71.6k127489

You can use lodash's _.pick() with Array.map() (or lodash's _.map()):

const data = [a:1, b:2, c:3, d:4, a:11, b:22, c:33, d:44]
const saveByKeys = ['a', 'c']

const result = data.map(o => _.pick(o, saveByKeys))

console.log(result)

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.min.js"></script>

const data = [a:1, b:2, c:3, d:4, a:11, b:22, c:33, d:44]
const saveByKeys = ['a', 'c']

const result = data.map(o => _.pick(o, saveByKeys))

console.log(result)

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.min.js"></script>

const data = [a:1, b:2, c:3, d:4, a:11, b:22, c:33, d:44]
const saveByKeys = ['a', 'c']

const result = data.map(o => _.pick(o, saveByKeys))

console.log(result)

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.min.js"></script>

answered Nov 11 at 12:09

Ori Drori

71.6k127489

answered Nov 11 at 12:09

Ori Drori

71.6k127489

answered Nov 11 at 12:09

Ori Drori

71.6k127489

answered Nov 11 at 12:09

Ori Drori

71.6k127489

That's great, thanks a lot
– jack ho
Nov 11 at 12:11

add a comment |

That's great, thanks a lot
– jack ho
Nov 11 at 12:11

That's great, thanks a lot
– jack ho
Nov 11 at 12:11

add a comment |

up vote
0
down vote

If you want to avoid lodash this is how this would look like with ES6:

var data = [a:1, b:2, c:3, d:4, a:11, b:22, c:33, d:44]
var keys = ['a', 'c']

const pick = (obj, keys) => keys.reduce((r,c) => (r[c] = obj[c], r),)
console.log(data.map(x => pick(x, keys)))

edited Nov 11 at 23:43

answered Nov 11 at 20:06

Akrion

8,35411223

add a comment |

up vote
0
down vote

If you want to avoid lodash this is how this would look like with ES6:

var data = [a:1, b:2, c:3, d:4, a:11, b:22, c:33, d:44]
var keys = ['a', 'c']

const pick = (obj, keys) => keys.reduce((r,c) => (r[c] = obj[c], r),)
console.log(data.map(x => pick(x, keys)))

edited Nov 11 at 23:43

answered Nov 11 at 20:06

Akrion

8,35411223

add a comment |

up vote
0
down vote

If you want to avoid lodash this is how this would look like with ES6:

var data = [a:1, b:2, c:3, d:4, a:11, b:22, c:33, d:44]
var keys = ['a', 'c']

const pick = (obj, keys) => keys.reduce((r,c) => (r[c] = obj[c], r),)
console.log(data.map(x => pick(x, keys)))

edited Nov 11 at 23:43

answered Nov 11 at 20:06

Akrion

8,35411223

If you want to avoid lodash this is how this would look like with ES6:

var data = [a:1, b:2, c:3, d:4, a:11, b:22, c:33, d:44]
var keys = ['a', 'c']

const pick = (obj, keys) => keys.reduce((r,c) => (r[c] = obj[c], r),)
console.log(data.map(x => pick(x, keys)))

var data = [a:1, b:2, c:3, d:4, a:11, b:22, c:33, d:44]
var keys = ['a', 'c']

const pick = (obj, keys) => keys.reduce((r,c) => (r[c] = obj[c], r),)
console.log(data.map(x => pick(x, keys)))

var data = [a:1, b:2, c:3, d:4, a:11, b:22, c:33, d:44]
var keys = ['a', 'c']

const pick = (obj, keys) => keys.reduce((r,c) => (r[c] = obj[c], r),)
console.log(data.map(x => pick(x, keys)))

edited Nov 11 at 23:43

answered Nov 11 at 20:06

Akrion

8,35411223

edited Nov 11 at 23:43

answered Nov 11 at 20:06

Akrion

8,35411223

answered Nov 11 at 20:06

Akrion

8,35411223

answered Nov 11 at 20:06

Akrion

8,35411223

add a comment |

draft saved

draft discarded

Thanks for contributing an answer to Stack Overflow!

Please be sure to answer the question. Provide details and share your research!

But avoid …

Asking for help, clarification, or responding to other answers.

Making statements based on opinion; back them up with references or personal experience.

To learn more, see our tips on writing great answers.

Some of your past answers have not been well-received, and you're in danger of being blocked from answering.

Please pay close attention to the following guidance:

Please be sure to answer the question. Provide details and share your research!

But avoid …

Asking for help, clarification, or responding to other answers.

Making statements based on opinion; back them up with references or personal experience.

To learn more, see our tips on writing great answers.

draft saved

draft discarded

Post as a guest

Name

Required, but never shown

Name

Required, but never shown

Name

Required, but never shown

This page is only for reference, If you need detailed information, please check here

搜尋此網誌

Odtnhj