I want to show the key and value from nested object with data :
const obj = {
"success": true,
"data": {
"data1": {
"label": "label1",
"value": "value1"
},
"data2": {
"label": "label2",
"value": "value2"
}
}
}
And want to show the data to object like this:
{data1: "value1", data2: "value2"}
I already try this:
const init = Object.entries(obj.data).map(([key, value]) => {
const data = `${key}: ${value.value}`;
return data;
});
But I got wrong format.
Use the reduce function
const obj = {
"success": true,
"data": {
"data1": {
"label": "label1",
"value": "value1"
},
"data2": {
"label": "label2",
"value": "value2"
}
}
}
const list = Object.keys(obj.data).reduce((acc, key) => {
acc[key] = obj.data[key].value
return acc
}, {})
console.log( list)
You could use Array#reduce for it.
const obj = {success:true,data:{data1:{label:"label1",value:"value1"},data2:{label:"label2",value:"value2"}}};
const res = Object.entries(obj.data).reduce((acc, [key, obj]) => ({
...acc,
[key]: obj.value,
}), {});
console.log(res);
Related
I want to overwrite the array if the keys are the same. And push if keys are different.
From this:
const fieldData = [
{
"field_1": {
"value": "oldValue"
},
"field_2": {
"value": "oldValue"
}
}
];
const [data, setData] = useState(fieldData);
const pushData = (newData) => {
setData(current => [...current, newData]);
}
The result if the keys are the same:
{
"field_1": {
"value": "newValue"
},
"field_2": {
"value": "oldValue"
}
}
The result if the keys are diffrent:
{
"field_1": {
"value": "newValue"
},
"field_2": {
"value": "oldValue"
},
"field_3": {
"value": "newValue Field 3"
}
}
I would recommend you to work with a different data structure.
Change your array and work with a dictionary.
const fieldData = {
"field_1": {
"value": "oldValue"
},
"field_2": {
"value": "oldValue"
}
}
const [data, setData] = useState(fieldData);
const pushData = (newData) => {
setData(current => ({...current,...newData}));
}
In this case, if you have a new [key, value] it will be added to your object. Otherwise the value will be overridden
I am trying to update my product attributes and i came to a solution only for one attribute.
this is my carrtItems state
this.state = {
cartItems: [],
selectedAttributes: []
Json Object
{
"__typename": "Product",
"name": "iPhone 12 Pro",
"inStock": true,
"attributes": [
{
"__typename": "AttributeSet",
"id": "Capacity",
"name": "Capacity",
"type": "text",
"items": [
{
"__typename": "Attribute",
"id": "512G",
"value": "512G"
},
{
"__typename": "Attribute",
"id": "1T",
"value": "1T"
}
]
},
{
"__typename": "AttributeSet",
"id": "Color",
"items": [
{
"__typename": "Attribute",
"id": "Black",
"value": "#000000"
},
{
"__typename": "Attribute",
"id": "White",
"value": "#FFFFFF"
}
]
}
],
"id": "product1",
"quantity": 1,
"selectedAttributes": [
{
"value": "512G",
"type": "Capacity",
"id": "product1"
},
{
"value": "#44FF03",
"type": "Color",
"id": "product1"
}
]
}
This is my update function:
updateCartItem = (cart, product, selectedAttribute, newAttributes) => {
const existingCartItem = cart.find(
(cartItem) => cartItem.id === product.id
);
const thisCart = cart.filter((cartItem) => cartItem.id !== product.id)
if (existingCartItem) {
cart.map((cartItem) =>
cartItem.selectedAttributes.map((attr)=> attr.type===selectedAttribute.map((newAttr)=>newAttr.type
? newAttributes= [{
...attr,
value: newAttr.value,
}]
: [newAttributes = attr]
)));
return [
...thisCart,
{ ...product, selectedAttributes: newAttributes },
];
}
};
This is update state function
updateItemToCart = (product, selectedAttributes) => {
this.setState({
cartItems: this.updateCartItem(this.state.cartItems, product, selectedAttributes),
});
};
This my is my selected attributes functions
selectAttribute = (attribute, newAttribute, type, id) => {
const existingAttribute = attribute.find(
(attr) => attr.type === type && attr.id === id
);
if (existingAttribute) {
return attribute.map((attr) =>
attr.type === type && attr.id === id
? { ...attr, value: newAttribute }
: attr
);
}
return [...attribute, { value: newAttribute, type, id }];
};
selectedAttributesHandler = (newAttribute, type, id) => {
this.setState({
selectedAttributes: this.selectAttribute(
this.state.selectedAttributes,
newAttribute,
type,
id
),
});
};
What i want here is to update selectedAttributes if color or size changes but to remain the other attribute.
Example:
Color: white, Size: M
Here i change the size to L on click
Result:
Color: white, Size:L
How to update updateCartItem function to achieve this result.
You can use the spread operator
It allows you to easily populate an object or array with a shallow copy of the contect of another object or array.
The syntax is three dots followed by the name of the object or array that we want to copy.
Example:
this.setState({
...this.state,
selectedAttributes: this.selectAttribute(
this.state.selectedAttributes,
newAttribute,
type,
id
),
});
There are other ways of achieving this, but this is the likely the simplest way and is a common pattern when working with state in React.
I am trying to add data grouping by the unit name for showing functionality
const [allData , setAllData]= useState([{'unit':'' , data:[]}])
useEffect(async () => {
await axios.get(`${BACKEND_URL}/data`).then(res => {
res.data.map(elem => {
setAllData(prev =>[...prev , { 'unit': elem.unitName, 'data': [elem.lessonName] }]);
});
});
}, []);
the result is duplicating the key for the subarray which is "unit" for my exampl:
[
{
"unit": "unit 1",
"data": [
"LO1"
]
},
{
"unit": "unit 2",
"data": [
"LO2"
]
},
{
"unit": "unit 3",
"data": [
"LO3"
]
},
{
"unit": "unit 1",
"data": [
"LO15"
]
}
]
Try like that, if find unique property unit rewrite data or push new element to array
useEffect(async () => {
await axios.get(`${BACKEND_URL}/data`).then(res => {
setAllData((prev) => {
let result = [...prev];
res.data.forEach(({ unitName: unit, lessonName }) => {
const index = result.findIndex((elem) => elem.unit === unit);
if (index >= 0) {
result[index].data = [...result[index].data, lessonName]
} else {
result.push({unit, data: [lessonName]});
}
});
return result;
});
});
}, []);
In my MongoDB database, I have a collection 'produits' with documents like this
{
"_id": {
"$oid": "6048e97b4a5f000096007505"
},
"modeles": [
{
"id": "OppoA3",
"pieces": [
{
"id": "OppoA3avn"
},
{
"id": "OppoA3bat"
}]
]
},
{
"id": "OppoA1",
"pieces": [
{
"id": "OppoA1avn",
},
{
"id": "OppoA1batt",
}
]
}
]
}
How can I delete all modeles.pieces from all my documents.
I managed to delete with a filter on modeles.id but with that code but not on all the collection
db.produits.update(
{marque_id:'OPPO', 'modeles.id':'RENOZ'},
{$set:
{
'modeles.$.pieces': []
}
}
, { multi : true }
)
I would like all documents like this finally
{
"_id": {
"$oid": "6048e97b4a5f000096007505"
},
"modeles": [
{
"id": "OppoA3",
"pieces": []
},
{
"id": "OppoA1",
"pieces": []
}
]
}
Thank you for your help.
I have done a javascript loop like this, but i think it's not best practice
async removePieces(){
var doc
try {
doc = await produitModel.find()
for (var produit of doc) {
for (var modele of produit.modeles) {
const filter = {'marque_id': produit.marque_id, 'modeles.id': modele.id}
const set = {
$set: {
'modeles.$.pieces': []
}
}
await db.collection('produits').updateOne(filter, set)
}
}
console.log('removePieces() ==> Terminé')
} catch(err) {
console.log(err)
}
}
db.produits.update({
modeles: {//This is because your second document will create failure otherwise
$exists: true
}
},
{
$set: {
"modeles.$.pieces": []
}
},
{
multi: true
})
I have an array list which needs to be converted to a single object with few of the values from array list using TypeScript in Angular 8. Below is the array:
"arrayList": [{
"name": "Testname1",
"value": "abc"
},
{
"name": "Testname2",
"value": "xyz"
}
]
This needs to be converted to the below format,
data: {
"Testname1": "abc",
"Testname2": "xyz",
}
No matter how much i try, i end up creating a list instead of a single object. Can you please help on the same?
You can use as follows,
var arr = [
{
"name": "Testname1",
"value": "abc"
},
{
"name": "Testname2",
"value": "xyz"
}
];
var result = {};
for (var i = 0; i < arr.length; i++) {
result[arr[i].name] = arr[i].value;
}
console.log(result);
Try with using .reduce() as the following:
const arrayList = [{ "name": "Testname1", "value": "abc" }, { "name": "Testname2", "value": "xyz" }];
const data = arrayList.reduce((a, {name, value}) => {
a[name] = value;
return a;
}, {});
const result = { data };
console.log(result);
Use Array.map() to get a list of [name, value] entries, then use Object.fromEntries() to convert to an object:
const arrayList = [{ "name": "Testname1", "value": "abc" }, { "name": "Testname2", "value": "xyz" }];
const result = Object.fromEntries(arrayList.map(({ name, value }) => [name, value]));
console.log(result);
Please use the below code
const rawData = {
"arrayList": [{
"name": "Testname1",
"value": "abc"
},
{
"name": "Testname2",
"value": "xyz"
}
]
};
const updatedData = {
data: {}
};
for (const item of rawData["arrayList"]) {
updatedData.data[item.name] = item.value;
}
console.log(updatedData);