React Native -- Loop through array of objects to return value - react-native

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.

Related

How to access json array elements (keys) , values in json nested dictionary type using postgresql?

I have a nested structure json .
How to extract the specific elements(keys) and values?
How to access " sky: selling":"1"
Or "U1":"0000" ?
I tried json_object_keys and json_array_elements for extracting the array .
But I don't know exactly how to do this query.
Example code:
Table- record and column name : report
{
"PIname": {
"n1": "x1",
"n2": "x2",
"params": {
"S1": {
"code1": "y1",
"Code2": "y2",
},
"id": "2d",
"Dest": {
"Code3": "mi"
}
},
"PIDataArea": {
"m1": null,
"PInven": {
"head": {
"Code4": "Increase",
"line": "2020-01"
},
"PILine": [
{
"u1": "0000",
"u2": "0",
"u3": "1",
"modes": {
"#cID": "Sng",
"#txt": "12.21"
} },
{
"Qualify": ".0001",
"QOrder": "1",
"UPriceAmt": {
"#cID": "sng",
"#txt": "13" },
"sky:Qa": ".000",
"sky:Partcode": {
"#c1ID": "a"
},
"sky:SCode": "Ni",
"sky:PItem": {
"sky:ID": "h"
},
"sky:Forest": {
"sky:q1": [
{
"sky:selling": "1"
}
{
"sky:selling": "0"
}
]
} } }} }}
I tried lot ,one example query here like,
Select * from record r
Where exists( select report->'sky: selling' from json_each(r.report) b where b.value->>'sky:selling' Ilike '0');
You can use the json_path_query or jsonb_path_query function. Example to extract the element with key = "sky:selling" :
json_path_query(r.report, $.** ? (#.key == 'sky:selling'))

Vue JS2 find array value by id

How can i get the value by id from a array in vue js? Many thanks with solution
list = [
{
"name": "Apple",
"id": 1,
},
{
"name": "Orange",
"id": 2,
}
]
watch: {
food: function (val) {
//Get food name by val(id)
}
}
Use Array.find method, which returns the value of the first element in the array that satisfies the provided testing function:
var food = list.find(food => food.id === val)
var name = food ? null : food.name
let list = [
{
"name": "Apple",
"id": 1,
},
{
"name": "Orange",
"id": 2,
}
]
console.log(
list.find(food => food.id === 1).name
)

Use object instead of array in datatables

When using datatables, I get 'no data available in table' when using an object instead of array:
var data1 =
{
"status": "success",
"districts": {
"1": {
"district_number": "1",
"district_name": "district one"
},
"2": {
"district_number": "2",
"district_name": "district two"
}
},
"time": "1.109s"
};
var table1 = jQuery("#data_table1").DataTable({
"data": data1.districts,
"aoColumns": [
{ "mData": "district_number" },
{ "mData": "district_name" }
]
});
I can get an array to display in a datatable using mData as follows:
var data2 =
{
"status": "success",
"districts": [
{
"district_number": "1",
"district_name": "district one"
},
{
"district_number": "2",
"district_name": "district two"
}
],
"time": "1.109s"
};
var table2 = jQuery("#data_table2").DataTable({
"data": data2.districts,
"aoColumns": [
{ "mData": "district_number" },
{ "mData": "district_name" }
]
});
https://jsfiddle.net/w93gubLv/
Is there a way to get datatables to utilize the object in the original format, or must I convert the object to an array?
You can write your own function to convert one format to another, for example:
function formatData(data){
var result = [];
for(prop in data){
if(data.hasOwnProperty(prop)){
result.push( data[prop] );
}
}
return result;
}
You can then later use it to pass data to jQuery DataTables as shown below.
var table1 = jQuery("#data_table1").DataTable({
"data": formatData(data1.districts),
"aoColumns": [
{ "mData": "district_number" },
{ "mData": "district_name" }
]
});
See updated jsFiddle for code and demonstration.

make a new array from a nested object using Lodash

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
}
});

dataTables make <tr> clickable to link

I have a dataTables table at http://communitychessclub.com/test.php
My problem is I need to make an entire table row clickable to a link based on a game#. The table lists games and user should click on a row and the actual game loads.
I am unable to understand the previous solutions to this problem. Can somebody please explain this in simple terms?
I previously did this at http://communitychessclub.com/games.php (but that version is too verbose and does disk writes with php echo)
with
echo "<tr onclick=\"location.href='basic.php?game=$game'\" >";
<script>$(document).ready(function() {
$('#cccr').dataTable( {
"ajax": "cccr.json",
"columnDefs": [
{
"targets": [ 0 ],
"visible": false,
}
],
"columns": [
{ "data": "game" },
{ "data": "date" },
{ "data": "event" },
{ "data": "eco" },
{ "data": "white_rating" },
{ "data": "white" },
{ "data": "black_rating" },
{ "data": "black" }
]
} );
} );</script>
"cccr.json" looks like this and is fine:
{
"data": [
{
"game": "5086",
"date": "09/02/2013",
"event": "135th NYS Ch.",
"eco": "B08",
"white": "Jones, Robert",
"white_rating": "2393",
"black": "Spade, Sam",
"black_rating": "2268"
},
...
You can do it this way:
Use fnRowCallback to add a game-id data-attribute to your datatable rows
...
{ "data": "black" }
],
"fnRowCallback": function (nRow, aData, iDisplayIndex, iDisplayIndexFull) {
//var id = aData[0];
var id = aData.game;
$(nRow).attr("data-game-id", id);
return nRow;
}
This will give each row in your table a game id attribute e.g:
<tr class="odd" data-game-id="5086">
Then create a javascript listener for the click event and redirect to the game page passing the game id taken from the tr data-attribute:
$('#cccr tbody').on('click', 'tr', function () {
var id = $(this).data("game-id");
window.location = 'basic.php?game=' + id;
}