Related
I need to perform filter in the array of objects to get all the keys. Although, whenever there is a obj inside of that key, I would need to get the key name and concat with the key name from the obj, so for example:
const data = [ id: 5, name: "Something", obj: { lower: True, higher: False } ]
result = ["id", "name", "obj.lower", "obj.higher"]
I could manage to do the above code, but, if there is more objs inside the data, I would need to keep adding a if condition inside of my logic, I would like to know if there is any other way, so it doesn't matter how many objects I have inside the objects, It will concat always.
The code I used from the above mention:
const itemsArray = [
{ id: 1, item: "Item 001", obj: { name: 'Nilton001', message: "Free001", obj2: { test: "test001" } } },
{ id: 2, item: "Item 002", obj: { name: 'Nilton002', message: "Free002", obj2: { test: "test002" } } },
{ id: 3, item: "Item 003", obj: { name: 'Nilton003', message: "Free003", obj2: { test: "test003" } } },
];
const csvData = [
Object.keys(itemsArray[0]),
...itemsArray.map(item => Object.values(item))
].map(e => e.join(",")).join("\n")
// Separating keys
let keys = []
const allKeys = Object.entries(itemsArray[0]);
for (const data of allKeys) {
if (typeof data[1] === "object") {
const gettingObjKeys = Object.keys(data[1]);
const concatingKeys = gettingObjKeys.map((key) => data[0] + "." + key);
keys.push(concatingKeys);
} else {
keys.push(data[0])
}
}
//Flating
const flattingKeys = keys.reduce((acc, val: any) => acc.concat(val), []);
What I would like to achieve, lets suppose I have this array of object:
const data =
[
{ id: 10, obj: {name: "Name1", obj2: {name2: "Name2", test: "Test"}}}
...
]
Final result = ["id", "obj.name", "obj.obj2.name2", "obj.obj2.test"]
OBS: The first obj contains all the keys I need, no need to loop through other to get KEYS.
I would like to achieve, all the keys from the first object of the array, and if there is objects inside of objects, I would like to concat the obj names (obj.obj2key1)
You could map the key or the keys of the nested objects.
const
getKeys = object => Object
.entries(object)
.flatMap(([k, v]) => v && typeof v === 'object'
? getKeys(v).map(s => `${k}.${s}`)
: k
),
getValues = object => Object
.entries(object)
.flatMap(([k, v]) => v && typeof v === 'object'
? getValues(v)
: v
),
data = { id: 1, item: "Item 001", obj: { name: 'Nilton001', message: "Free001", obj2: { test: "test001" } } },
keys = getKeys(data),
values = getValues(data);
console.log(keys);
console.log(values);
.as-console-wrapper { max-height: 100% !important; top: 0; }
something like this
const itemsArray = [
{ id: 1, item: "Item 001", obj: { name: 'Nilton001', message: "Free001", obj2: { test: "test001" } } },
{ id: 2, item: "Item 002", obj: { name: 'Nilton002', message: "Free002", obj2: { test: "test002" } } },
{ id: 3, item: "Item 003", obj: { name: 'Nilton003', message: "Free003", obj2: { test: "test003" } } },
];
const item = itemsArray[0];
const getAllKeys = (obj, prefix=[]) => {
if(typeof obj !== 'object'){
return prefix.join('.')
}
return Object.entries(obj).flatMap(([k, v]) => getAllKeys(v, [...prefix, k]))
}
console.log(getAllKeys(item))
The OP solution can be simplified by accepting a prefix param (the parent key) and a results param (defaulted to [] and passed into the recursion) to do the flattening...
let obj = { key0: 'v0', key1: { innerKey0: 'innerV0', innerInner: { deeplyNested: 'v' } }, key2: { anotherInnerKey: 'innerV' } }
function recursiveKeys(prefix, obj, result=[]) {
let keys = Object.keys(obj);
keys.forEach(key => {
if (typeof obj[key] === 'object')
recursiveKeys(key, obj[key], result);
else
result.push(`${prefix}.${key}`)
});
return result;
}
console.log(recursiveKeys('', obj))
function getKeys(obj) {
return Object.keys((typeof obj === 'object' && obj) || {}).reduce((acc, key) => {
if (obj[key] && typeof obj[key] === 'object') {
const keys = getKeys(obj[key]);
keys.forEach((k) => acc.add(`${key}.${k}`));
} else {
acc.add(key);
}
return acc;
}, new Set());
}
// accumulate the keys in a set (the items of the array may
// have different shapes). All of the possible keys will be
// stored in a set
const s = itemsArray.reduce(
(acc, item) => new Set([...acc, ...getKeys(item)]),
new Set()
);
console.log('Keys => ', Array.from(s));
You can use recursion as follows. Since typeof([1,3,5]) is object, we also have to confirm that value is not an array, !Array.isArray(value):
const obj = { id: 10, obj: {name: "Name1", obj2: {name2: "Name2", test: "Test"}}};
const getKeys = (o,p) => Object.entries(o).flatMap(([key,value]) =>
typeof(value) === 'object' && !Array.isArray(value) ?
getKeys(value, (p?`${p}.`:"") + key) :
(p ? `${p}.`: "") + key
);
console.log( getKeys(obj) );
I'm trying to write a recursive function to go through an object and return items based off an ID. I can get the first part of this to work, but I'm having a hard time trying to get this function in a recursive manner and could use a fresh set of eyes. The code is below. When you run the snippet, you get an array of 6 items which for the first iteration is what I want, but how can I call my function with the proper parameters to get the nested items? My end goal is to have the all the objects starting with 'Cstm', nested ones too, to be added to the tablesAndValues array. I was trying to model my code after this: Get all key values from multi level nested array JavaScript, but this deals with an array of objects and not an object of objects. Any hint or tips I can get are very appreciated.
JSFiddle: https://jsfiddle.net/xov49jLs/
const response = {
"data": {
"Cstm_PF_ADG_URT_Disposition": {
"child_welfare_placement_value": ""
},
"Cstm_PF_ADG_URT_Demographics": {
"school_grade": "family setting",
"school_grade_code": ""
},
"Cstm_Precert_Medical_Current_Meds": [
{
"med_name": "med1",
"dosage": "10mg",
"frequency": "daily"
},
{
"med_name": "med2",
"dosage": "20mg",
"frequency": "daily"
}
],
"Cstm_PF_ADG_URT_Substance_Use": {
"dimension1_comment": "dimension 1 - tab1",
"Textbox1": "text - tab1"
},
"Cstm_PF_ADG_Discharge_Note": {
"prior_auth_no_comm": "auth no - tab2"
},
"Cstm_PF_ADG_URT_Clinical_Plan": {
"cca_cs_dhs_details": "details - tab2"
},
"container": {
"Cstm_PF_Name": {
"first_name": "same text for textbox - footer",
"last_name": "second textbox - footer"
},
"Cstm_PF_ADG_URT_Demographics": {
"new_field": "mapped demo - footer"
},
"grid2": [
{
"Cstm_PF_ADG_COMP_Diagnosis": {
"diagnosis_label": "knee",
"diagnosis_group_code": "leg"
}
},
{
"Cstm_PF_ADG_COMP_Diagnosis": {
"diagnosis_label": "ankle",
"diagnosis_group_code": "leg"
}
}
]
},
"submit": true
}
};
function getNamesAndValues(data, id) {
const tablesAndValues = [],
res = data;
Object.entries(res).map(([key, value]) => {
const newKey = key.split('_')[0].toLowerCase();
// console.log(newKey) // -> 'cstm'
if (newKey === id) {
tablesAndValues.push({
table: key,
values: value
});
} else {
// I can log value and key and see what I want to push
// to the tablesAndValues array, but I can't seem to get
// how to push the nested items.
// console.log(value);
// console.log(key);
// getNamesAndValues(value, key)
}
});
return tablesAndValues;
}
console.log(getNamesAndValues(response.data, 'cstm'));
To achieve the result with a single push, one can pass the result table to the function when called recursively, but default it to an empty table on the first call. I've also changed .map to .forEach since the return value is not used:
const response = {
"data": {
"Cstm_PF_ADG_URT_Disposition": {
"child_welfare_placement_value": ""
},
"Cstm_PF_ADG_URT_Demographics": {
"school_grade": "family setting",
"school_grade_code": ""
},
"Cstm_Precert_Medical_Current_Meds": [
{
"med_name": "med1",
"dosage": "10mg",
"frequency": "daily"
},
{
"med_name": "med2",
"dosage": "20mg",
"frequency": "daily"
}
],
"Cstm_PF_ADG_URT_Substance_Use": {
"dimension1_comment": "dimension 1 - tab1",
"Textbox1": "text - tab1"
},
"Cstm_PF_ADG_Discharge_Note": {
"prior_auth_no_comm": "auth no - tab2"
},
"Cstm_PF_ADG_URT_Clinical_Plan": {
"cca_cs_dhs_details": "details - tab2"
},
"container": {
"Cstm_PF_Name": {
"first_name": "same text for textbox - footer",
"last_name": "second textbox - footer"
},
"Cstm_PF_ADG_URT_Demographics": {
"new_field": "mapped demo - footer"
},
"grid2": [
{
"Cstm_PF_ADG_COMP_Diagnosis": {
"diagnosis_label": "knee",
"diagnosis_group_code": "leg"
}
},
{
"Cstm_PF_ADG_COMP_Diagnosis": {
"diagnosis_label": "ankle",
"diagnosis_group_code": "leg"
}
}
]
},
"submit": true
}
};
function getNamesAndValues(data, id, tablesAndValues = []) {
const res = data;
Object.entries(res).forEach(([key, value]) => {
const newKey = key.split('_')[0].toLowerCase();
if (newKey === id) {
tablesAndValues.push({
table: key,
values: value
});
} else {
getNamesAndValues( value, id, tablesAndValues); }
});
return tablesAndValues;
}
console.log(getNamesAndValues(response.data, 'cstm'));
You just need to call push to tablesAndValues inside the else statement with the rest operator and pass the value and id as parameters
const response = {
"data": {
"Cstm_PF_ADG_URT_Disposition": {
"child_welfare_placement_value": ""
},
"Cstm_PF_ADG_URT_Demographics": {
"school_grade": "family setting",
"school_grade_code": ""
},
"Cstm_Precert_Medical_Current_Meds": [
{
"med_name": "med1",
"dosage": "10mg",
"frequency": "daily"
},
{
"med_name": "med2",
"dosage": "20mg",
"frequency": "daily"
}
],
"Cstm_PF_ADG_URT_Substance_Use": {
"dimension1_comment": "dimension 1 - tab1",
"Textbox1": "text - tab1"
},
"Cstm_PF_ADG_Discharge_Note": {
"prior_auth_no_comm": "auth no - tab2"
},
"Cstm_PF_ADG_URT_Clinical_Plan": {
"cca_cs_dhs_details": "details - tab2"
},
"container": {
"Cstm_PF_Name": {
"first_name": "same text for textbox - footer",
"last_name": "second textbox - footer"
},
"Cstm_PF_ADG_URT_Demographics": {
"new_field": "mapped demo - footer"
},
"grid2": [
{
"Cstm_PF_ADG_COMP_Diagnosis": {
"diagnosis_label": "knee",
"diagnosis_group_code": "leg"
}
},
{
"Cstm_PF_ADG_COMP_Diagnosis": {
"diagnosis_label": "ankle",
"diagnosis_group_code": "leg"
}
}
]
},
"submit": true
}
};
function getNamesAndValues(data, id) {
const tablesAndValues = [],
res = data;
Object.entries(res).map(([key, value]) => {
const newKey = key.split('_')[0].toLowerCase();
// console.log(newKey) // -> 'cstm'
if (newKey === id) {
tablesAndValues.push({
table: key,
values: value
});
} else {
// I can log value and key and see what I want to push
// to the tablesAndValues array, but I can't seem to get
// how to push the nested items.
// console.log(value);
// console.log(key);
tablesAndValues.push(...getNamesAndValues(value, id))
}
});
return tablesAndValues;
}
console.log(getNamesAndValues(response.data, 'cstm'));
Or in shorter way
function getNamesAndValues2(data, id) {
return Object.entries(data).reduce((arr, [key, value]) => {
arr.push(
...(key.split('_')[0].toLowerCase() === id ? [{ table: key, values: value }] : getNamesAndValues(value, id))
);
return arr
}, []);
}
Here's a working version. I call the main function recursively if the value is either an array or an object. Also passing in the current state of the tallying array each time.
function getNamesAndValues(data, id, tablesAndValues = []) {
const res = data;
Object.entries(res).map(([key, value]) => {
const newKey = key.split('_')[0].toLowerCase();
const item = res[key];
if (newKey === id) {
tablesAndValues.push({
table: key,
values: value
});
}
if(Array.isArray(item)) {
return item.map(el => getNamesAndValues(el, id, tablesAndValues));
}
if(typeof item === 'object') {
return getNamesAndValues(item, id, tablesAndValues);
}
})
return tablesAndValues;
}
console.log(getNamesAndValues(response.data, 'cstm'));
Here's another approach using generators -
const keySearch = (t = [], q = "") =>
filter(t, ([ k, _ ]) => String(k).startsWith(q))
const r =
Array.from
( keySearch(response, "Cstm")
, ([ table, values ]) =>
({ table, values })
)
console.log(r)
[
{
table: 'Cstm_PF_ADG_URT_Disposition',
values: { child_welfare_placement_value: '' }
},
{
table: 'Cstm_PF_ADG_URT_Demographics',
values: { school_grade: 'family setting', school_grade_code: '' }
},
{
table: 'Cstm_Precert_Medical_Current_Meds',
values: [ [Object], [Object] ]
},
{
table: 'Cstm_PF_ADG_URT_Substance_Use',
values: {
dimension1_comment: 'dimension 1 - tab1',
Textbox1: 'text - tab1'
}
},
{
table: 'Cstm_PF_ADG_Discharge_Note',
values: { prior_auth_no_comm: 'auth no - tab2' }
},
{
table: 'Cstm_PF_ADG_URT_Clinical_Plan',
values: { cca_cs_dhs_details: 'details - tab2' }
},
{
table: 'Cstm_PF_Name',
values: {
first_name: 'same text for textbox - footer',
last_name: 'second textbox - footer'
}
},
{
table: 'Cstm_PF_ADG_URT_Demographics',
values: { new_field: 'mapped demo - footer' }
},
{
table: 'Cstm_PF_ADG_COMP_Diagnosis',
values: { diagnosis_label: 'knee', diagnosis_group_code: 'leg' }
},
{
table: 'Cstm_PF_ADG_COMP_Diagnosis',
values: { diagnosis_label: 'ankle', diagnosis_group_code: 'leg' }
}
]
Above, keySearch is simply a specialisation of filter -
function* filter (t = [], test = v => v)
{ for (const v of traverse(t)){
if (test(v))
yield v
}
}
Which is a specialisation of traverse -
function* traverse (t = {})
{ if (Object(t) === t)
for (const [ k, v ] of Object.entries(t))
( yield [ k, v ]
, yield* traverse(v)
)
}
Expand the snippet below to verify the result in your browser -
function* traverse (t = {})
{ if (Object(t) === t)
for (const [ k, v ] of Object.entries(t))
( yield [ k, v ]
, yield* traverse(v)
)
}
function* filter (t = [], test = v => v)
{ for (const v of traverse(t)){
if (test(v))
yield v
}
}
const keySearch = (t = [], q = "") =>
filter(t, ([ k, _ ]) => String(k).startsWith(q))
const response =
{"data":{"Cstm_PF_ADG_URT_Disposition":{"child_welfare_placement_value":""},"Cstm_PF_ADG_URT_Demographics":{"school_grade":"family setting","school_grade_code":""},"Cstm_Precert_Medical_Current_Meds":[{"med_name":"med1","dosage":"10mg","frequency":"daily"},{"med_name":"med2","dosage":"20mg","frequency":"daily"}],"Cstm_PF_ADG_URT_Substance_Use":{"dimension1_comment":"dimension 1 - tab1","Textbox1":"text - tab1"},"Cstm_PF_ADG_Discharge_Note":{"prior_auth_no_comm":"auth no - tab2"},"Cstm_PF_ADG_URT_Clinical_Plan":{"cca_cs_dhs_details":"details - tab2"},"container":{"Cstm_PF_Name":{"first_name":"same text for textbox - footer","last_name":"second textbox - footer"},"Cstm_PF_ADG_URT_Demographics":{"new_field":"mapped demo - footer"},"grid2":[{"Cstm_PF_ADG_COMP_Diagnosis":{"diagnosis_label":"knee","diagnosis_group_code":"leg"}},{"Cstm_PF_ADG_COMP_Diagnosis":{"diagnosis_label":"ankle","diagnosis_group_code":"leg"}}]},"submit":true}}
const result =
Array.from
( keySearch(response, "Cstm")
, ([ table, values ]) =>
({ table, values })
)
console.log(result)
A reasonably elegant recursive answer might look like this:
const getNamesAndValues = (obj) =>
Object (obj) === obj
? Object .entries (obj)
.flatMap (([k, v]) => [
... (k .toLowerCase () .startsWith ('cstm') ? [{table: k, value: v}] : []),
... getNamesAndValues (v)
])
: []
const response = {data: {Cstm_PF_ADG_URT_Disposition: {child_welfare_placement_value: ""}, Cstm_PF_ADG_URT_Demographics: {school_grade: "family setting", school_grade_code: ""}, Cstm_Precert_Medical_Current_Meds: [{med_name: "med1", dosage: "10mg", frequency: "daily"}, {med_name: "med2", dosage: "20mg", frequency: "daily"}], Cstm_PF_ADG_URT_Substance_Use: {dimension1_comment: "dimension 1 - tab1", Textbox1: "text - tab1"}, Cstm_PF_ADG_Discharge_Note: {prior_auth_no_comm: "auth no - tab2"}, Cstm_PF_ADG_URT_Clinical_Plan: {cca_cs_dhs_details: "details - tab2"}, container: {Cstm_PF_Name: {first_name: "same text for textbox - footer", last_name: "second textbox - footer"}, Cstm_PF_ADG_URT_Demographics: {new_field: "mapped demo - footer"}, grid2: [{Cstm_PF_ADG_COMP_Diagnosis: {diagnosis_label: "knee", diagnosis_group_code: "leg"}}, {Cstm_PF_ADG_COMP_Diagnosis: {diagnosis_label: "ankle", diagnosis_group_code: "leg"}}]}, submit: true}}
console .log (getNamesAndValues (response))
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But this is not as simple as I would like. This code mixes the searching for matches and the test used in that searching together with the formatting of the output. It means that it is a custom function that is both more complex to understand and less reusable than I would like.
I would prefer to use some reusable functions, separating out three feature of this functionality. So, while the following involves more lines of code, I think it makes more sense:
const findAllDeep = (pred) => (obj) =>
Object (obj) === obj
? Object .entries (obj)
.flatMap (([k, v]) => [
... (pred (k, v) ? [[k, v]] : []),
... findAllDeep (pred) (v)
])
: []
const makeSimpleObject = (name1, name2) => ([k, v]) =>
({[name1]: k, [name2]: v})
const makeSimpleObjects = (name1, name2) => (xs) =>
xs .map (makeSimpleObject (name1, name2))
const cstmTest = k =>
k .toLowerCase () .startsWith ('cstm')
const getNamesAndValues = (obj) =>
makeSimpleObjects ('table', 'values') (findAllDeep (cstmTest) (obj))
const response = {data: {Cstm_PF_ADG_URT_Disposition: {child_welfare_placement_value: ""}, Cstm_PF_ADG_URT_Demographics: {school_grade: "family setting", school_grade_code: ""}, Cstm_Precert_Medical_Current_Meds: [{med_name: "med1", dosage: "10mg", frequency: "daily"}, {med_name: "med2", dosage: "20mg", frequency: "daily"}], Cstm_PF_ADG_URT_Substance_Use: {dimension1_comment: "dimension 1 - tab1", Textbox1: "text - tab1"}, Cstm_PF_ADG_Discharge_Note: {prior_auth_no_comm: "auth no - tab2"}, Cstm_PF_ADG_URT_Clinical_Plan: {cca_cs_dhs_details: "details - tab2"}, container: {Cstm_PF_Name: {first_name: "same text for textbox - footer", last_name: "second textbox - footer"}, Cstm_PF_ADG_URT_Demographics: {new_field: "mapped demo - footer"}, grid2: [{Cstm_PF_ADG_COMP_Diagnosis: {diagnosis_label: "knee", diagnosis_group_code: "leg"}}, {Cstm_PF_ADG_COMP_Diagnosis: {diagnosis_label: "ankle", diagnosis_group_code: "leg"}}]}, submit: true}}
console .log (findAllDeep (cstmTest) (response))
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These are all helper functions of varying degree of reusability:
makeSimpleObject takes two key names, say 'foo', and 'bar' and returns a function which takes a two-element array, say [10, 20] and returns an object matching those up, like {foo: 10, bar: 20}
makeSimpleObjects does the same thing for an array of two-element arrays: makeSimpleObjects('foo', 'bar')([[8, 6], [7, 5], [30, 9]]) //=> [{foo: 8, bar: 6}, {foo: 7, bar: 5}, {foo: 30, bar: 9}].
cstmTest is a simple predicate to test whether a key begins (case-insensitively) with "cstm".
and findAllDeep takes a predicate and returns a function which takes an object and returns an array of two-element arrays, holding the keys/value pairs for any items which match the predicate. (The predicate is supplied both the key and the value; in the current case we only need the key, but it seems sensible for the function to take either.
Our main function, getNamesAndValues, uses findAllDeep (cstmTest) to find the matching values and then makeSimpleObjects ('table', 'values') to convert the result to the final format.
Note that findAllDeep, makeSimpleObject, and makeSimpleObjects are all functions likely to be useful elsewhere. The customization here is only in cstmTest and in the short definition for getNamesAndValues. I would count that as a win.
So this is how my data looks:
categories = [
{
name: ""
products: [
{
id: 1,
...
},
{
id: 2,
...
}
]
},
{
name: ""
products: [
{
id: 3,
...
},
{
id: 4,
...
}
]
},
...
]
I want to remove a product with id 1 and this is my code:
categories.map(category => category.products.filter(product => product.id !== 1))
Is this the right code? If so how I create a new array and set it with the new values?
You're close, but your code is replacing category objects with just their filtered products array, losing the rest of the object properties. You need to copy each category object as well as its products array, which you typically do via spread notation:
updatedCategories = categories.map(category => ({
...category,
products: category.products.filter(product => product.id !== 1)
}));
Just a modified version on T.J. Crowder's response.
The filterGroupedBy function is more versatile and de-coupled from the business logic.
I even created a lodash mixin that you can call via:
_.filterGroupedBy(list, key, fn) or
_.chain(list).filterGroupedBy(key, fn).value()
Demo
const disp = (value) => console.log(JSON.stringify(value))
const filterGroupedBy = (list, key, fn) =>
list.map(item => ({
...item,
[key] : item[key].filter(entry => fn(entry))
}))
_.mixin({
'filterGroupedBy' : (list, key, fn) => filterGroupedBy(list, key, fn)
})
let categories = [{
name: "",
products: [{ id: 1 }, { id: 2 }]
}, {
name: "",
products: [{ id: 3 }, { id: 4 }]
}]
// plain js
disp(filterGroupedBy(categories, 'products', (prod) => prod.id !== 1))
// lodash - static and chain
disp(_.filterGroupedBy(categories, 'products', (prod) => prod.id !== 1))
disp(_.chain(categories).filterGroupedBy('products', (prod) => prod.id !== 1).value())
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<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.min.js"></script>
Nested Data
If you have nested data, you can iterate through a path to target the object you want to filter on.
You just need a function similar to Object.byPath (a custom polyfill).
const main = () => {
let categories = [{
name: "",
products: {
data : [{ id: 1 }, { id: 2 }]
}
}, {
name: "",
products: {
data : [{ id: 3 }, { id: 4 }]
}
}]
// plain js
disp(filterGroupedBy(categories, 'products.data', p => p.id !== 1))
// lodash - static and chain
disp(_.filterGroupedBy(categories, 'products.data', p => p.id !== 1))
disp(_.chain(categories).filterGroupedBy('products.data', p => p.id !== 1).value())
}
// Required by filterGroupedBy
if (Object.byPath === undefined) {
Object.byPath = (obj, path) => path
.replace(/\[(\w+)\]/g, '.$1')
.replace(/^\./, '')
.split(/\./g)
.reduce((ref, key) => key in ref ? ref[key] : ref, obj)
}
/* #ifndef filterGroupedBy */
const filterGroupedBy = (list, path, fn) =>
list.map(item => {
let lastIndex = path.lastIndexOf('.'),
target = path.substring(0, lastIndex),
key = path.substring(lastIndex + 1)
return Object.assign({}, Object.byPath(item, target), {
[key] : Object.byPath(item, path).filter(entry => fn(entry))
})
})
_.mixin({
'filterGroupedBy' : (list, key, fn) => filterGroupedBy(list, key, fn)
})
/* #endif */
const disp = (value) => console.log(JSON.stringify(value))
main()
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<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.min.js"></script>
I want to convert all data into one object,
let d = {
"Coupon_Code": "code",
"Coupon_Name": "namie",
"Coupon_Desc": 1000,
"selectedCity": [
{
"Coupon_City_Name": "xyz"
}
],
"selectedCategory": [
{
"Coupon_Category_Name": "Shopping"
}
],
"selectedCompany": [
{
"Coupon_Company_Name": "Shopper Stop"
}
],
"selectedState": [
{
"Coupon_State_Name": "abc"
}
],
"Coupon_Date": "2222-02-22",
}
i tried some methods of Object like keys , entries but dont no what to use.
Final output should be
let d = {
Coupon_Code: "code",
Coupon_Name: "namie",
Coupon_Desc: 1000,
Coupon_City_Name: "xyz",
Coupon_Category_Name: "Shopping",
Coupon_Company_Name: "Shopper Stop",
Coupon_State_Name: "abc",
Coupon_Date: "2222-02-22",
};
what's the best and optimum way to have above result using Venila Js and Es6
Reduce the entries of the original object. If the entry's value is an array merge the 1st element, if not merge the original key and value. You can merge the properties into the object using object spread:
const data = {"Coupon_Code":"code","Coupon_Name":"namie","Coupon_Desc":1000,"selectedCity":[{"Coupon_City_Name":"xyz"}],"selectedCategory":[{"Coupon_Category_Name":"Shopping"}],"selectedCompany":[{"Coupon_Company_Name":"Shopper Stop"}],"selectedState":[{"Coupon_State_Name":"abc"}],"Coupon_Date":"2222-02-22"};
const result = Object.entries(data)
.reduce((r, [k, v]) => ({
...r,
...Array.isArray(v) ? v[0] : { [k]: v }
}), {});
console.log(result);
You can use Array.reduce and Object.entries
let d = {"Coupon_Code":"code","Coupon_Name":"namie","Coupon_Desc":1000,"selectedCity":[{"Coupon_City_Name":"xyz"}],"selectedCategory":[{"Coupon_Category_Name":"Shopping"}],"selectedCompany":[{"Coupon_Company_Name":"Shopper Stop"}],"selectedState":[{"Coupon_State_Name":"abc"}],"Coupon_Date":"2222-02-22"};
d = Object.entries(d).reduce((a,[k,v]) => {
// If the value is an array, iterate over it to merge into the resultant object
if(Array.isArray(v)) Object.assign(a, ...v)
else Object.assign(a, {[k]:v}) // if it is not an array, merge into resultant object
return a;
}, {});
console.log(d);
You could take a recursive approach.
const
fn = o => Object.assign(...Object.entries(o).map(([k, v]) => Array.isArray(v) ? Object.assign(...v.map(fn)) : { [k]: v })),
d = { Coupon_Code: "code", Coupon_Name: "namie", Coupon_Desc: 1000, selectedCity: [{ Coupon_City_Name: "xyz" }], selectedCategory: [{ Coupon_Category_Name: "Shopping" }], selectedCompany: [{ Coupon_Company_Name: "Shopper Stop" }], selectedState: [{ Coupon_State_Name: "abc" }], Coupon_Date: "2222-02-22" },
result = fn(d);
console.log(result);
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A possible iterative solution is:
function flatten(obj) {
let r = {}
for (let [key, value] of Object.entries(obj)) {
if (Array.isArray(value)) {
Object.assign(r, value[0]);
} else {
Object.assign(r, {[key]: value});
}
}
return r;
}
Something like this:
const d = { Coupon_Code: "code", Coupon_Name: "namie", Coupon_Desc: 1000, selectedCity: [{ Coupon_City_Name: "xyz" }], selectedCategory: [{ Coupon_Category_Name: "Shopping" }], selectedCompany: [{ Coupon_Company_Name: "Shopper Stop" }], selectedState: [{ Coupon_State_Name: "abc" }], Coupon_Date: "2222-02-22" };
function toSingleObj(obj) {
var result = {};
Object.entries(obj).forEach(([key,value]) => {
if (Array.isArray(value)) {
Object.entries(value[0]).forEach(([k,v]) => {
result[k] = v;
});
} else {
result[key] = value;
}
});
return result;
}
console.log("Result: ", toSingleObj(d));
var routePlan = [
{
"id" : 1,
"farmerName" : "Farmer1",
"farmerId" : 1
},
{
"id" : 2,
"farmerName" : "Farmer2",
"farmerId" : 2
},
{
"id" : 1,
"farmerName" : "Farmer3",
"farmerId" : 3
}
];
I want to merge objects having same id and create a new combined object using javascript or angularjs
var routePlan = [
{
"id" : 1,
"farmers" : [
{
"farmerName" : "Farmer1",
"farmerId" : 1
},
{
"farmerName" : "Farmer3",
"farmerId" : 3
}
]
},
{
"id" : 2,
"farmerName" : "Farmer3",
"farmerId" : 2
}
];
Please help me, I have seen lot of examples on the net but nothing seems to match my requirement
It can surely be improved, but this is a working solution:
let temp = routePlan.reduce(function(acc, item){
acc[item.id] = acc[item.id] || [];
acc[item.id].push({ "farmerName": item.farmerName, "farmerId" : item.farmerId });
return acc;
}, {});
let newRoute = Object.keys(temp).map(function(key){
let newObj = {}
if (temp[key].length > 1){
newObj.id = parseInt(key);
newObj.farmers = temp[key];
}
else
{
newObj = Object.assign({}, routePlan.find(elem => elem.id == key));
}
return newObj;
});
Note the reduce function used to group your objects by id.
You could take a hash table as reference to the groups.
var data = [{ id: 1, farmerName: "Farmer1", farmerId: 1 }, { id: 2, farmerName: "Farmer2", farmerId: 2 }, { id: 1, farmerName: "Farmer3", farmerId: 3 }],
hash = Object.create(null),
grouped = data.reduce(function (r, a) {
function getP(o) {
return ['farmerName', 'farmerId'].reduce(function (r, k) {
r[k] = o[k];
return r;
}, {});
}
if (!(a.id in hash)) {
hash[a.id] = r.push(a) - 1;
return r;
}
if (!r[hash[a.id]].farmers) {
r[hash[a.id]] = { id: a.id, farmers: [getP(r[hash[a.id]])] };
}
r[hash[a.id]].farmers.push(getP(a));
return r
}, []);
console.log(grouped);
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