Is this a valid/safe way to clone any object/function/etc. in ES6?
0
I'm wondering whether this is a safe approach to cloning a variable that could be anything:
// the original variable definition:
let varIWantToCopy = 'hello world'
// the clone variable's definition:
let {varIWantToCopy: cloneOfVarIWantToCopy} = {varIWantToCopy}
// mutating the original value:
varIWantToCopy = 'goodbye world'
// should log out 'hello world':
console.log(cloneOfVarIWantToCopy)
Thank you for taking the time to look this over.
Kind regards,
Harry
javascript variables ecmascript-6 clone immutability
asked Nov 14 '18 at 1:16
Harry Solovay
156
add a comment |
0
I'm wondering whether this is a safe approach to cloning a variable that could be anything:
// the original variable definition:
let varIWantToCopy = 'hello world'
// the clone variable's definition:
let {varIWantToCopy: cloneOfVarIWantToCopy} = {varIWantToCopy}
// mutating the original value:
varIWantToCopy = 'goodbye world'
// should log out 'hello world':
console.log(cloneOfVarIWantToCopy)
Thank you for taking the time to look this over.
Kind regards,
Harry
javascript variables ecmascript-6 clone immutability
asked Nov 14 '18 at 1:16
Harry Solovay
156
2
No, because no clone or copy is made by that code. There is no native facility for a general-case "clone" or "copy" from an object because what that means is subjective.
– Pointy
Nov 14 '18 at 1:17
strings are immutable. You can just dolet clone = varIWantToCopyand then you can modify clone without affectingvarIWantToCopy
– Doug Coburn
Nov 14 '18 at 1:19
add a comment |
0
0
0
I'm wondering whether this is a safe approach to cloning a variable that could be anything:
// the original variable definition:
let varIWantToCopy = 'hello world'
// the clone variable's definition:
let {varIWantToCopy: cloneOfVarIWantToCopy} = {varIWantToCopy}
// mutating the original value:
varIWantToCopy = 'goodbye world'
// should log out 'hello world':
console.log(cloneOfVarIWantToCopy)
Thank you for taking the time to look this over.
Kind regards,
Harry
javascript variables ecmascript-6 clone immutability
asked Nov 14 '18 at 1:16
Harry Solovay
156
I'm wondering whether this is a safe approach to cloning a variable that could be anything:
// the original variable definition:
let varIWantToCopy = 'hello world'
// the clone variable's definition:
let {varIWantToCopy: cloneOfVarIWantToCopy} = {varIWantToCopy}
// mutating the original value:
varIWantToCopy = 'goodbye world'
// should log out 'hello world':
console.log(cloneOfVarIWantToCopy)
Thank you for taking the time to look this over.
Kind regards,
Harry
javascript variables ecmascript-6 clone immutability
javascript variables ecmascript-6 clone immutability
asked Nov 14 '18 at 1:16
Harry Solovay
156
asked Nov 14 '18 at 1:16
Harry Solovay
156
asked Nov 14 '18 at 1:16
Harry Solovay
156
asked Nov 14 '18 at 1:16
Harry Solovay
156
asked Nov 14 '18 at 1:16
Harry Solovay
156
156
2
No, because no clone or copy is made by that code. There is no native facility for a general-case "clone" or "copy" from an object because what that means is subjective.
– Pointy
Nov 14 '18 at 1:17
strings are immutable. You can just dolet clone = varIWantToCopyand then you can modify clone without affectingvarIWantToCopy
– Doug Coburn
Nov 14 '18 at 1:19
add a comment |
2
No, because no clone or copy is made by that code. There is no native facility for a general-case "clone" or "copy" from an object because what that means is subjective.
– Pointy
Nov 14 '18 at 1:17
strings are immutable. You can just dolet clone = varIWantToCopyand then you can modify clone without affectingvarIWantToCopy
– Doug Coburn
Nov 14 '18 at 1:19
2
2
No, because no clone or copy is made by that code. There is no native facility for a general-case "clone" or "copy" from an object because what that means is subjective.
– Pointy
Nov 14 '18 at 1:17
No, because no clone or copy is made by that code. There is no native facility for a general-case "clone" or "copy" from an object because what that means is subjective.
– Pointy
Nov 14 '18 at 1:17
strings are immutable. You can just do
let clone = varIWantToCopy and then you can modify clone without affecting varIWantToCopy– Doug Coburn
Nov 14 '18 at 1:19
strings are immutable. You can just do
let clone = varIWantToCopy and then you can modify clone without affecting varIWantToCopy– Doug Coburn
Nov 14 '18 at 1:19
add a comment |
1 Answer
1
active
oldest
votes
1
I think you should use lodash if you really want to clone an object.
There are several clone functions in lodash that you can use depending on your requirements.
// or you can use lodash/clone
import cloneDeep from 'lodash/cloneDeep';
var objects = [{ 'a': 1 }, { 'b': 2 }];
var cloned = cloneDeep(objects);
console.log(cloned[0] === objects[0]); // this will be false
So if you change the value of cloned[0], the value of object[0] won't change.
answered Nov 14 '18 at 2:01
xeiton
2216
Thank you @xeiton! Would this work if a function was assigned toobjects?
– Harry Solovay
Nov 14 '18 at 13:01
@HarrySolovay, I am not 100% sure, but my guess is that it should work with functions too, since functions are a type of object in JS. If this answer helped you please accept as an answer or up-vote, or both :P ... Thank you!
– xeiton
Nov 14 '18 at 22:28
add a comment |
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1 Answer
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1 Answer
1
active
oldest
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1
I think you should use lodash if you really want to clone an object.
There are several clone functions in lodash that you can use depending on your requirements.
// or you can use lodash/clone
import cloneDeep from 'lodash/cloneDeep';
var objects = [{ 'a': 1 }, { 'b': 2 }];
var cloned = cloneDeep(objects);
console.log(cloned[0] === objects[0]); // this will be false
So if you change the value of cloned[0], the value of object[0] won't change.
answered Nov 14 '18 at 2:01
xeiton
2216
Thank you @xeiton! Would this work if a function was assigned toobjects?
– Harry Solovay
Nov 14 '18 at 13:01
@HarrySolovay, I am not 100% sure, but my guess is that it should work with functions too, since functions are a type of object in JS. If this answer helped you please accept as an answer or up-vote, or both :P ... Thank you!
– xeiton
Nov 14 '18 at 22:28
add a comment |
1
I think you should use lodash if you really want to clone an object.
There are several clone functions in lodash that you can use depending on your requirements.
// or you can use lodash/clone
import cloneDeep from 'lodash/cloneDeep';
var objects = [{ 'a': 1 }, { 'b': 2 }];
var cloned = cloneDeep(objects);
console.log(cloned[0] === objects[0]); // this will be false
So if you change the value of cloned[0], the value of object[0] won't change.
answered Nov 14 '18 at 2:01
xeiton
2216
Thank you @xeiton! Would this work if a function was assigned toobjects?
– Harry Solovay
Nov 14 '18 at 13:01
@HarrySolovay, I am not 100% sure, but my guess is that it should work with functions too, since functions are a type of object in JS. If this answer helped you please accept as an answer or up-vote, or both :P ... Thank you!
– xeiton
Nov 14 '18 at 22:28
add a comment |
1
1
1
I think you should use lodash if you really want to clone an object.
There are several clone functions in lodash that you can use depending on your requirements.
// or you can use lodash/clone
import cloneDeep from 'lodash/cloneDeep';
var objects = [{ 'a': 1 }, { 'b': 2 }];
var cloned = cloneDeep(objects);
console.log(cloned[0] === objects[0]); // this will be false
So if you change the value of cloned[0], the value of object[0] won't change.
answered Nov 14 '18 at 2:01
xeiton
2216
I think you should use lodash if you really want to clone an object.
There are several clone functions in lodash that you can use depending on your requirements.
// or you can use lodash/clone
import cloneDeep from 'lodash/cloneDeep';
var objects = [{ 'a': 1 }, { 'b': 2 }];
var cloned = cloneDeep(objects);
console.log(cloned[0] === objects[0]); // this will be false
So if you change the value of cloned[0], the value of object[0] won't change.
answered Nov 14 '18 at 2:01
xeiton
2216
edited Nov 16 '18 at 12:54
answered Nov 14 '18 at 2:01
xeiton
2216
answered Nov 14 '18 at 2:01
xeiton
2216
answered Nov 14 '18 at 2:01
xeiton
2216
2216
Thank you @xeiton! Would this work if a function was assigned toobjects?
– Harry Solovay
Nov 14 '18 at 13:01
@HarrySolovay, I am not 100% sure, but my guess is that it should work with functions too, since functions are a type of object in JS. If this answer helped you please accept as an answer or up-vote, or both :P ... Thank you!
– xeiton
Nov 14 '18 at 22:28
add a comment |
Thank you @xeiton! Would this work if a function was assigned toobjects?
– Harry Solovay
Nov 14 '18 at 13:01
@HarrySolovay, I am not 100% sure, but my guess is that it should work with functions too, since functions are a type of object in JS. If this answer helped you please accept as an answer or up-vote, or both :P ... Thank you!
– xeiton
Nov 14 '18 at 22:28
Thank you @xeiton! Would this work if a function was assigned to
objects?– Harry Solovay
Nov 14 '18 at 13:01
Thank you @xeiton! Would this work if a function was assigned to
objects?– Harry Solovay
Nov 14 '18 at 13:01
@HarrySolovay, I am not 100% sure, but my guess is that it should work with functions too, since functions are a type of object in JS. If this answer helped you please accept as an answer or up-vote, or both :P ... Thank you!
– xeiton
Nov 14 '18 at 22:28
@HarrySolovay, I am not 100% sure, but my guess is that it should work with functions too, since functions are a type of object in JS. If this answer helped you please accept as an answer or up-vote, or both :P ... Thank you!
– xeiton
Nov 14 '18 at 22:28
add a comment |
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2
No, because no clone or copy is made by that code. There is no native facility for a general-case "clone" or "copy" from an object because what that means is subjective.
– Pointy
Nov 14 '18 at 1:17
strings are immutable. You can just do
let clone = varIWantToCopyand then you can modify clone without affectingvarIWantToCopy– Doug Coburn
Nov 14 '18 at 1:19