I'm using v4.11.0.
I would like sort objects based on milliseconds property.
Here's the array :
[
{
"name": "bug12755.xml",
"list": "bugs42",
"start-date": "2015-09-14",
"age": {
"text": "7 months",
"milliseconds": 18381227304
}
},
{
"name": "bug12922.xml",
"list": "bugs42",
"start-date": "2015-08-27",
"age": {
"text": "8 months",
"milliseconds": 19936427304
}
},
{
"name": "bug13183.xml",
"list": "bugs50",
"start-date": "2015-08-27",
"age": {
"text": "8 months",
"milliseconds": 19936427305
}
}
]
I'm missing something fundamental about the iteratee function. I have this but does not seem to sort the array. Thanks in advance!
_.orderBy(list, function(item) {
return item.age.value;
}, ['desc']);
It seems that you are ordering by the wrong property value.
_.orderBy(list, item => item.age.milliseconds, ['desc']);
https://codepen.io/a2qube/pen/pKYrgN
A simple example on how you can use the Lodash: orderBy to sort based on inner attributes.
hotels = _.orderBy(hotels, 'account.id', 'desc');
A simple example on how you can sort by another property if one is undefined:
import _ from "lodash";
const orderItems = (items) => _.orderBy(items, (item) => item.displayName || item.name, ["asc"]);
Referance:
https://stackoverflow.com/a/36606220/5994546
lodash orderBy on nested property
Related
I am new to lodash.
I am having trouble filtering with lodash. I have a deep nested json object that I want to filter if productName = 'Lotto' and the board selectionMethod = "AUTOPICK"
When I try the solution below, it returns all results instead of filtering. I have tried multiple ways to do this but I always get all results returning.
Could anyone offer a suggestion?
var results = {
"buyTicketDetails": {
"result": 0,
"message": "Success",
"product": [
{
"productName": "Lotto",
"displayPromoMessage": false,
"drawDetails": [
{
"drawTypeDescription": "REGULAR DRAW",
"drawAttribute": "EVENING",
"drawStartDate": "2019-01-12T00:00:00.000-05",
"drawEndDate": "2019-01-12T00:00:00.000-05"
},
{
"drawTypeDescription": "SPECIAL DRAW",
"drawAttribute": "EVENING",
"drawStartDate": "2019-01-12T00:00:00.000-05",
"drawEndDate": "2019-01-12T00:00:00.000-05"
}
],
"board": [
{
"boardType": "REGULAR",
"selectionMethod": "AUTOPICK",
"selectionSet": [
"2",
"4",
"10",
"12",
"17",
"31"
]
},
{
"boardType": "RAFFLE",
"selectionMethod": "SYSTEMPICK",
"selectionSet": [
"40001722-01"
]
}
]
},
{
"productName": "Encore",
"displayPromoMessage": false,
"drawDetails": [
{
"drawTypeDescription": "REGULAR DRAW",
"drawAttribute": "EVENING",
"drawStartDate": "2019-01-12T00:00:00.000-05",
"drawEndDate": "2019-01-12T00:00:00.000-05"
}
],
"board": [
{
"boardType": "REGULAR",
"selectionMethod": "SYSTEMPICK",
"selectionSet": [
"3440514"
]
}
]
}
]
}
}
const filterCat = _.filter(results, { product: [
{
productName: "Lotto",
board: {
selectionMethod: "AUTOPICK"
}}
]
}
);
console.log(filterCat);
With Pure JS.
You can do this with Javascript's filter function too.
filter function actually works on Arrays, so we use map loop to add objects into arrays first, then we use filter function to get only the data we need!.
let Product = results.buyTicketDetails.product
let getSelectionMethods=(index) => Product[index].board.map((d,i)=>d.selectionMethod)
let getTargetedProducts =(Name,Method)=> Product.map((d,i)=>{
if(Product[i].productName==Name && getselectionMethods(i).indexOf(Method) !==-1){
return d
}
})
let FilteredProducts = getTargetedProducts("Lotto","AUTOPICK").filter((d)=>d !==undefined)
console.log(FilteredProducts)
I have json data similar to this:
{
"Sections": [
{
"Categories": [
{
"Name": "Book",
"Id": 1,
"Options": [
{
"Name": "AAAA",
"OptionId": 111
},
"Selected": 0
},
{
"Name": "Car",
"Id": 2,
"Options": [
{
"Name": "BBB",
"OptionId": 222
},
"Selected": 0
},
],
"SectionName": "Main"
},
... more sections like the one above
]
}
Given this data, I want to find a category inside a section based on its (Category) Id, and set its selected option, I tried this, but couldn't get it to work....Note Category Id will be unique in the whole data set.
_.find(model.Sections, { Categories: [ { Id: catId } ]});
According to your data model, it looks like you're trying to find an element that is inside a matrix: Sections can have multiple Categories and a Category can have multiple types (car, book...).
I'm afraid there isn't a function in lodash that allows a deep find, you'll have to implement it the 'traditional' way (a couple of fors).
I provide this solution that is a bit more 'functional flavoured' than the traditional nested fors. It also takes advantage of the fact that when you explicitly return false inside a forEach, the loop finishes. Thus, once an element with the provided id is found, the loop is ended and the element returned (if it's not found, undefined is returned instead).
Hope it helps.
const findCategoryById = (sections, id) => {
var category;
_.forEach(sections, (section) => {
category = _.find(section.Categories, ['Id', id]);
return _.isUndefined(category);
});
return category;
};
const ex = {
"Sections": [{
"Categories": [{
"Name": "Book",
"Id": 1,
"Options": [{
"Name": "AAAA",
"OptionId": 111
}],
"Selected": 0
},
{
"Name": "Car",
"Id": 2,
"Options": [{
"Name": "BBB",
"OptionId": 222
}],
"Selected": 0
}
],
"SectionName": "Main"
}]
};
console.log(findCategoryById(ex.Sections, 2));
<script src="https://cdn.jsdelivr.net/npm/lodash#4.17.5/lodash.min.js"></script>
Data:
{
"contextTag": {
"value": "Bittersweet",
"valueLabel": "Bittersweet"
},
"tags": [
{
"name": "tag",
"value": "Creamy"
},
{
"name": "tag",
"value": "Colorful"
},
{
"name": "tag",
"value": "Bright"
}
],
"rating": 5,
"userNickName": "HelloGames",
"userLocation": "UK",
"title": "Great!",
"reviewText": "Yada yada yada yada",
"submissionTime": "30 Nov 16"
},
I currently have this working for getting contextTag valueLabels:
this.props.reviewData.reviews.map(
(o) => {
return o.contextTag && o.contextTag.valueLabel ? o.contextTag.valueLabel.trim() : '';
}
)
And this for tags:
this.props.reviewData.reviews.map(
(o) => {
return o.tags && o.tags.value ? o.tags.value.trim() : '';
}
)
But it's coming back empty. How do I loop through tags to grab each of the values?
You can cache the tags, then map over it to get the values. Like below:
const tags = this.props.reviewData.reviews.tags;
const tags_values = ( tags ? tags.map((tag) => (tag.value ? tag.value : '' ) : []); // this an array of the tags values.
Your code does not return what you want because the tags attributes is an array of objects, so to get the tag values you have to map over it as I did above.
Hope this helped.
I'd like to retrieve
document with _id of 1
OR
document with value === 13 AND anotherValue === 56
Error:
There is no index available for this selector.
This is my query:
{
"selector": {
"$or": [
{
"_id": "1"
},
{
"value": "13",
"anotherValue": "56"
}
]
}
}
Indexes setup:
Your available Indexes:
special: _id
json: value, anotherValue
json: _id, value, anotherValue
For this query you need to add a selector to get all the IDs like so:
{
"selector": {
"_id": {"$gt":null},
"$or": [
{
"_id": "1"
},
{
"value": "13",
"anotherValue": "56"
}
]
}
}
You can learn more here:
https://cloudant.com/blog/mango-json-vs-text-indexes/
And this SO post:
index and query items in an array with mango query for cloudant and couchdb 2.0
Alternatively, you can add a text index on all fields:
{
"index": {},
"type": "text"
}
And then your original selector should work.
Here is my data
[
{
"properties": {
"key": {
"data": "companya data",
"company": "Company A"
}
},
"uniqueId" : 1
},
{
"properties": {
"key": {
"data": "companyb data",
"company": "Company B"
}
},
"uniqueId" : 2
},
{
"properties": {
"key": {
"data": "companyc data",
"company": "Company C"
}
},
"uniqueId" : 3
}
]
The format I need for my typeahead directive is below. I was trying to figure out the other post I made but still couldn't make it work. The best was to just make the nested collection as a simple collection of object.
[
{
"uniqueId" : 1,
"data": "companya data"
},
{
"uniqueId" : 2,
"data": "companyb data"
},
{
"uniqueId" : 3,
"data": "companyc data"
}
]
I got it!
console.log(
_(jsonData).map(function(obj) {
return {
d : obj.properties.key.data,
id : obj.uniqueId
}
})
.value()
);
You do not have to use the chaining feature of lodash as long as you are only performing one operation. You can simply use:
_.map(jsonData, function(obj) {
return {
d : obj.properties.key.data,
id : obj.uniqueId
}
});