Use sub-property to create new multidimensional object [duplicate]
0
This question already has an answer here:
How to group an array of objects by key
11 answers
Most efficient method to groupby on a array of objects
33 answers
I'm receiving from an API objects in following format:
{
id: 1,
first_name: 'Foo',
last_name: 'Bar',
birthdate: '1990-07-01',
birthplace: 'New York'
},
{
id: 2,
first_name: 'Mary',
last_name: 'Lou',
birthdate: '1984-12-15',
birthplace: 'Los Angeles'
}
Now I want to rearrange this object to a multidimensonal object (array of objects would be the correct terminus?):
{
'New York': {
id: 1,
first_name: 'Foo',
last_name: 'Bar',
birthdate: '1990-07-01',
birthplace: 'New York'
},
'Los Angeles': {
id: 2,
first_name: 'Mary',
last_name: 'Lou',
birthdate: '1984-12-15',
birthplace: 'Los Angeles'
}
}
Is there a proper way to do this? Coming from the PHP world and don't really know how to manage this.
Tried some things, this is what I had in mind, but just getting an empty object back (hung on the first step, create the multidimensional object with birthplace as property, as I cannot use the "push" function (I just don't know why).
var myList = [
{
id: 1,
first_name: 'Foo',
last_name: 'Bar',
birthdate: '1990-07-01',
birthplace: 'New York'
},
{
id: 2,
first_name: 'Mary',
last_name: 'Lou',
birthdate: '1984-12-15',
birthplace: 'Los Angeles'
}
];
function rearrange(object) {
var newObj = {};
for(var obj in object) {
if(newObj.hasOwnProperty(obj.birthplace)) {
newObj.push(obj.birthplace)
}
newObj[obj.birthplace].push(obj);
}
return newObj;
}
console.log(rearrange(myList)); // returns: Cannot read proerty 'push' of undefined
javascript arrays object multidimensional-array
asked Nov 20 at 13:19
Matt Backslash
3061213
marked as duplicate by Luis felipe De jesus Munoz, Nina Scholz arrays
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Nov 20 at 13:26
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
add a comment |
0
This question already has an answer here:
How to group an array of objects by key
11 answers
Most efficient method to groupby on a array of objects
33 answers
I'm receiving from an API objects in following format:
{
id: 1,
first_name: 'Foo',
last_name: 'Bar',
birthdate: '1990-07-01',
birthplace: 'New York'
},
{
id: 2,
first_name: 'Mary',
last_name: 'Lou',
birthdate: '1984-12-15',
birthplace: 'Los Angeles'
}
Now I want to rearrange this object to a multidimensonal object (array of objects would be the correct terminus?):
{
'New York': {
id: 1,
first_name: 'Foo',
last_name: 'Bar',
birthdate: '1990-07-01',
birthplace: 'New York'
},
'Los Angeles': {
id: 2,
first_name: 'Mary',
last_name: 'Lou',
birthdate: '1984-12-15',
birthplace: 'Los Angeles'
}
}
Is there a proper way to do this? Coming from the PHP world and don't really know how to manage this.
Tried some things, this is what I had in mind, but just getting an empty object back (hung on the first step, create the multidimensional object with birthplace as property, as I cannot use the "push" function (I just don't know why).
var myList = [
{
id: 1,
first_name: 'Foo',
last_name: 'Bar',
birthdate: '1990-07-01',
birthplace: 'New York'
},
{
id: 2,
first_name: 'Mary',
last_name: 'Lou',
birthdate: '1984-12-15',
birthplace: 'Los Angeles'
}
];
function rearrange(object) {
var newObj = {};
for(var obj in object) {
if(newObj.hasOwnProperty(obj.birthplace)) {
newObj.push(obj.birthplace)
}
newObj[obj.birthplace].push(obj);
}
return newObj;
}
console.log(rearrange(myList)); // returns: Cannot read proerty 'push' of undefined
javascript arrays object multidimensional-array
asked Nov 20 at 13:19
Matt Backslash
3061213
marked as duplicate by Luis felipe De jesus Munoz, Nina Scholz arrays
Users with the arrays badge can single-handedly close arrays questions as duplicates and reopen them as needed.
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Nov 20 at 13:26
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
do you want to get an array of object, grouped bybirthplaceinstead of haveing an single object as grouping result?
– Nina Scholz
Nov 20 at 13:21
Well, I need to group all the entries by birthplace, so I can output them in a table and count some informations stored in each entry.
– Matt Backslash
Nov 20 at 13:24
@CalvinNunes that doesn't make any sense
– charlietfl
Nov 20 at 13:31
Hint: You never created any arrays to push into ....newObj[obj.birthplace] =
– charlietfl
Nov 20 at 13:31
There are 3 errors in your code : 1/ in javascript, the for ... in loops over keys, not values. And it is discouraged for going through an array, use a classic for (i=0; i < object.length; i++) instead. 2/ Your test with hasOwnProperty is inverted, so it never pass inside. Invert it with ! 3/ newObj is an object, so you can't push on it, you must assign a new empty array to newObj[obj.birthplace]
– Pierre-Olivier Vares
Nov 20 at 13:33
add a comment |
0
0
0
This question already has an answer here:
How to group an array of objects by key
11 answers
Most efficient method to groupby on a array of objects
33 answers
I'm receiving from an API objects in following format:
{
id: 1,
first_name: 'Foo',
last_name: 'Bar',
birthdate: '1990-07-01',
birthplace: 'New York'
},
{
id: 2,
first_name: 'Mary',
last_name: 'Lou',
birthdate: '1984-12-15',
birthplace: 'Los Angeles'
}
Now I want to rearrange this object to a multidimensonal object (array of objects would be the correct terminus?):
{
'New York': {
id: 1,
first_name: 'Foo',
last_name: 'Bar',
birthdate: '1990-07-01',
birthplace: 'New York'
},
'Los Angeles': {
id: 2,
first_name: 'Mary',
last_name: 'Lou',
birthdate: '1984-12-15',
birthplace: 'Los Angeles'
}
}
Is there a proper way to do this? Coming from the PHP world and don't really know how to manage this.
Tried some things, this is what I had in mind, but just getting an empty object back (hung on the first step, create the multidimensional object with birthplace as property, as I cannot use the "push" function (I just don't know why).
var myList = [
{
id: 1,
first_name: 'Foo',
last_name: 'Bar',
birthdate: '1990-07-01',
birthplace: 'New York'
},
{
id: 2,
first_name: 'Mary',
last_name: 'Lou',
birthdate: '1984-12-15',
birthplace: 'Los Angeles'
}
];
function rearrange(object) {
var newObj = {};
for(var obj in object) {
if(newObj.hasOwnProperty(obj.birthplace)) {
newObj.push(obj.birthplace)
}
newObj[obj.birthplace].push(obj);
}
return newObj;
}
console.log(rearrange(myList)); // returns: Cannot read proerty 'push' of undefined
javascript arrays object multidimensional-array
asked Nov 20 at 13:19
Matt Backslash
3061213
This question already has an answer here:
How to group an array of objects by key
11 answers
Most efficient method to groupby on a array of objects
33 answers
I'm receiving from an API objects in following format:
{
id: 1,
first_name: 'Foo',
last_name: 'Bar',
birthdate: '1990-07-01',
birthplace: 'New York'
},
{
id: 2,
first_name: 'Mary',
last_name: 'Lou',
birthdate: '1984-12-15',
birthplace: 'Los Angeles'
}
Now I want to rearrange this object to a multidimensonal object (array of objects would be the correct terminus?):
{
'New York': {
id: 1,
first_name: 'Foo',
last_name: 'Bar',
birthdate: '1990-07-01',
birthplace: 'New York'
},
'Los Angeles': {
id: 2,
first_name: 'Mary',
last_name: 'Lou',
birthdate: '1984-12-15',
birthplace: 'Los Angeles'
}
}
Is there a proper way to do this? Coming from the PHP world and don't really know how to manage this.
Tried some things, this is what I had in mind, but just getting an empty object back (hung on the first step, create the multidimensional object with birthplace as property, as I cannot use the "push" function (I just don't know why).
var myList = [
{
id: 1,
first_name: 'Foo',
last_name: 'Bar',
birthdate: '1990-07-01',
birthplace: 'New York'
},
{
id: 2,
first_name: 'Mary',
last_name: 'Lou',
birthdate: '1984-12-15',
birthplace: 'Los Angeles'
}
];
function rearrange(object) {
var newObj = {};
for(var obj in object) {
if(newObj.hasOwnProperty(obj.birthplace)) {
newObj.push(obj.birthplace)
}
newObj[obj.birthplace].push(obj);
}
return newObj;
}
console.log(rearrange(myList)); // returns: Cannot read proerty 'push' of undefined
This question already has an answer here:
How to group an array of objects by key
11 answers
Most efficient method to groupby on a array of objects
33 answers
javascript arrays object multidimensional-array
javascript arrays object multidimensional-array
asked Nov 20 at 13:19
Matt Backslash
3061213
asked Nov 20 at 13:19
Matt Backslash
3061213
asked Nov 20 at 13:19
Matt Backslash
3061213
asked Nov 20 at 13:19
Matt Backslash
3061213
asked Nov 20 at 13:19
Matt Backslash
3061213
3061213
marked as duplicate by Luis felipe De jesus Munoz, Nina Scholz arrays
Users with the arrays badge can single-handedly close arrays questions as duplicates and reopen them as needed.
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Nov 20 at 13:26
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
marked as duplicate by Luis felipe De jesus Munoz, Nina Scholz arrays
Users with the arrays badge can single-handedly close arrays questions as duplicates and reopen them as needed.
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Nov 20 at 13:26
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
do you want to get an array of object, grouped bybirthplaceinstead of haveing an single object as grouping result?
– Nina Scholz
Nov 20 at 13:21
Well, I need to group all the entries by birthplace, so I can output them in a table and count some informations stored in each entry.
– Matt Backslash
Nov 20 at 13:24
@CalvinNunes that doesn't make any sense
– charlietfl
Nov 20 at 13:31
Hint: You never created any arrays to push into ....newObj[obj.birthplace] =
– charlietfl
Nov 20 at 13:31
There are 3 errors in your code : 1/ in javascript, the for ... in loops over keys, not values. And it is discouraged for going through an array, use a classic for (i=0; i < object.length; i++) instead. 2/ Your test with hasOwnProperty is inverted, so it never pass inside. Invert it with ! 3/ newObj is an object, so you can't push on it, you must assign a new empty array to newObj[obj.birthplace]
– Pierre-Olivier Vares
Nov 20 at 13:33
add a comment |
do you want to get an array of object, grouped bybirthplaceinstead of haveing an single object as grouping result?
– Nina Scholz
Nov 20 at 13:21
Well, I need to group all the entries by birthplace, so I can output them in a table and count some informations stored in each entry.
– Matt Backslash
Nov 20 at 13:24
@CalvinNunes that doesn't make any sense
– charlietfl
Nov 20 at 13:31
Hint: You never created any arrays to push into ....newObj[obj.birthplace] =
– charlietfl
Nov 20 at 13:31
There are 3 errors in your code : 1/ in javascript, the for ... in loops over keys, not values. And it is discouraged for going through an array, use a classic for (i=0; i < object.length; i++) instead. 2/ Your test with hasOwnProperty is inverted, so it never pass inside. Invert it with ! 3/ newObj is an object, so you can't push on it, you must assign a new empty array to newObj[obj.birthplace]
– Pierre-Olivier Vares
Nov 20 at 13:33
do you want to get an array of object, grouped by
birthplace instead of haveing an single object as grouping result?– Nina Scholz
Nov 20 at 13:21
do you want to get an array of object, grouped by
birthplace instead of haveing an single object as grouping result?– Nina Scholz
Nov 20 at 13:21
Well, I need to group all the entries by birthplace, so I can output them in a table and count some informations stored in each entry.
– Matt Backslash
Nov 20 at 13:24
Well, I need to group all the entries by birthplace, so I can output them in a table and count some informations stored in each entry.
– Matt Backslash
Nov 20 at 13:24
@CalvinNunes that doesn't make any sense
– charlietfl
Nov 20 at 13:31
@CalvinNunes that doesn't make any sense
– charlietfl
Nov 20 at 13:31
Hint: You never created any arrays to push into ....
newObj[obj.birthplace] =– charlietfl
Nov 20 at 13:31
Hint: You never created any arrays to push into ....
newObj[obj.birthplace] =– charlietfl
Nov 20 at 13:31
There are 3 errors in your code : 1/ in javascript, the for ... in loops over keys, not values. And it is discouraged for going through an array, use a classic for (i=0; i < object.length; i++) instead. 2/ Your test with hasOwnProperty is inverted, so it never pass inside. Invert it with ! 3/ newObj is an object, so you can't push on it, you must assign a new empty array to newObj[obj.birthplace]
– Pierre-Olivier Vares
Nov 20 at 13:33
There are 3 errors in your code : 1/ in javascript, the for ... in loops over keys, not values. And it is discouraged for going through an array, use a classic for (i=0; i < object.length; i++) instead. 2/ Your test with hasOwnProperty is inverted, so it never pass inside. Invert it with ! 3/ newObj is an object, so you can't push on it, you must assign a new empty array to newObj[obj.birthplace]
– Pierre-Olivier Vares
Nov 20 at 13:33
add a comment |
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do you want to get an array of object, grouped by
birthplaceinstead of haveing an single object as grouping result?– Nina Scholz
Nov 20 at 13:21
Well, I need to group all the entries by birthplace, so I can output them in a table and count some informations stored in each entry.
– Matt Backslash
Nov 20 at 13:24
@CalvinNunes that doesn't make any sense
– charlietfl
Nov 20 at 13:31
Hint: You never created any arrays to push into ....
newObj[obj.birthplace] =– charlietfl
Nov 20 at 13:31
There are 3 errors in your code : 1/ in javascript, the for ... in loops over keys, not values. And it is discouraged for going through an array, use a classic for (i=0; i < object.length; i++) instead. 2/ Your test with hasOwnProperty is inverted, so it never pass inside. Invert it with ! 3/ newObj is an object, so you can't push on it, you must assign a new empty array to newObj[obj.birthplace]
– Pierre-Olivier Vares
Nov 20 at 13:33