How to find a specific element in array from an array
-3
I am struggling with add one entry in history value from sampledata
let sampledata = [
{
headerKey: "FirstName",
value: "Dave",
}, {
headerKey: "LastName",
value: "K",
}]
// add here in history value
let addHere= [
{
headerKey: 'FirstName',
historyValue: ['abc', 'ghi', 'sss']
},
{
headerKey: 'LastName',
historyValue: ["'oo', 'ppp', 'qqqq']
}
]
//Output should be
//increment value in history value after comparing the header key from sampledata
let addHere= [
{
headerKey: 'FirstName',
historyValue: ['Aman', 'abc', 'ghi', 'sss']
},
{
headerKey: 'LastName',
historyValue: ['k', oo', 'ppp', 'qqqq']
}
]
javascript angular
edited Nov 23 '18 at 8:19
dwjohnston
2,607114488
asked Nov 23 '18 at 8:09
mave
144
add a comment |
-3
I am struggling with add one entry in history value from sampledata
let sampledata = [
{
headerKey: "FirstName",
value: "Dave",
}, {
headerKey: "LastName",
value: "K",
}]
// add here in history value
let addHere= [
{
headerKey: 'FirstName',
historyValue: ['abc', 'ghi', 'sss']
},
{
headerKey: 'LastName',
historyValue: ["'oo', 'ppp', 'qqqq']
}
]
//Output should be
//increment value in history value after comparing the header key from sampledata
let addHere= [
{
headerKey: 'FirstName',
historyValue: ['Aman', 'abc', 'ghi', 'sss']
},
{
headerKey: 'LastName',
historyValue: ['k', oo', 'ppp', 'qqqq']
}
]
javascript angular
edited Nov 23 '18 at 8:19
dwjohnston
2,607114488
asked Nov 23 '18 at 8:09
mave
144
add a comment |
-3
-3
-3
I am struggling with add one entry in history value from sampledata
let sampledata = [
{
headerKey: "FirstName",
value: "Dave",
}, {
headerKey: "LastName",
value: "K",
}]
// add here in history value
let addHere= [
{
headerKey: 'FirstName',
historyValue: ['abc', 'ghi', 'sss']
},
{
headerKey: 'LastName',
historyValue: ["'oo', 'ppp', 'qqqq']
}
]
//Output should be
//increment value in history value after comparing the header key from sampledata
let addHere= [
{
headerKey: 'FirstName',
historyValue: ['Aman', 'abc', 'ghi', 'sss']
},
{
headerKey: 'LastName',
historyValue: ['k', oo', 'ppp', 'qqqq']
}
]
javascript angular
edited Nov 23 '18 at 8:19
dwjohnston
2,607114488
asked Nov 23 '18 at 8:09
mave
144
I am struggling with add one entry in history value from sampledata
let sampledata = [
{
headerKey: "FirstName",
value: "Dave",
}, {
headerKey: "LastName",
value: "K",
}]
// add here in history value
let addHere= [
{
headerKey: 'FirstName',
historyValue: ['abc', 'ghi', 'sss']
},
{
headerKey: 'LastName',
historyValue: ["'oo', 'ppp', 'qqqq']
}
]
//Output should be
//increment value in history value after comparing the header key from sampledata
let addHere= [
{
headerKey: 'FirstName',
historyValue: ['Aman', 'abc', 'ghi', 'sss']
},
{
headerKey: 'LastName',
historyValue: ['k', oo', 'ppp', 'qqqq']
}
]
javascript angular
javascript angular
edited Nov 23 '18 at 8:19
dwjohnston
2,607114488
asked Nov 23 '18 at 8:09
mave
144
edited Nov 23 '18 at 8:19
dwjohnston
2,607114488
asked Nov 23 '18 at 8:09
mave
144
edited Nov 23 '18 at 8:19
dwjohnston
2,607114488
edited Nov 23 '18 at 8:19
dwjohnston
2,607114488
edited Nov 23 '18 at 8:19
dwjohnston
2,607114488
2,607114488
asked Nov 23 '18 at 8:09
mave
144
asked Nov 23 '18 at 8:09
mave
144
asked Nov 23 '18 at 8:09
mave
144
144
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
0
You can use a forEach() loop and inside that find the existing object in addHere array to get the object that matches the headerKey and then update the historyValue array:
let sampledata = [{
headerKey: "FirstName",
value: "Dave",
}, {
headerKey: "LastName",
value: "K",
},
{
headerKey: "NotExist",
value: "someVal",
}]
let addHere = [{
headerKey: 'FirstName',
historyValue: ['abc', 'ghi', 'sss']
},
{
headerKey: 'LastName',
historyValue: ['oo', 'ppp', 'qqqq']
}
];
sampledata.forEach((item)=>{
var existItem = addHere.find(({headerKey}) => headerKey === item.headerKey);
if(existItem){
//if you want to insert that in index 0
//else use existItem.historyValue.push(item.value);
existItem.historyValue.splice(0, 0, item.value);
} else {
addHere.push({
headerKey: item.headerKey,
historyValue: [item.value]
});
}
});
console.log(addHere);answered Nov 23 '18 at 8:15
Ankit Agarwal
23.7k52044
Thanks what if there is no value in addhere exist and i want to make a new one from sample data?
– mave
Nov 23 '18 at 8:52
@mave updated the answer. check it
– Ankit Agarwal
Nov 23 '18 at 8:53
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
0
You can use a forEach() loop and inside that find the existing object in addHere array to get the object that matches the headerKey and then update the historyValue array:
let sampledata = [{
headerKey: "FirstName",
value: "Dave",
}, {
headerKey: "LastName",
value: "K",
},
{
headerKey: "NotExist",
value: "someVal",
}]
let addHere = [{
headerKey: 'FirstName',
historyValue: ['abc', 'ghi', 'sss']
},
{
headerKey: 'LastName',
historyValue: ['oo', 'ppp', 'qqqq']
}
];
sampledata.forEach((item)=>{
var existItem = addHere.find(({headerKey}) => headerKey === item.headerKey);
if(existItem){
//if you want to insert that in index 0
//else use existItem.historyValue.push(item.value);
existItem.historyValue.splice(0, 0, item.value);
} else {
addHere.push({
headerKey: item.headerKey,
historyValue: [item.value]
});
}
});
console.log(addHere);answered Nov 23 '18 at 8:15
Ankit Agarwal
23.7k52044
Thanks what if there is no value in addhere exist and i want to make a new one from sample data?
– mave
Nov 23 '18 at 8:52
@mave updated the answer. check it
– Ankit Agarwal
Nov 23 '18 at 8:53
add a comment |
0
You can use a forEach() loop and inside that find the existing object in addHere array to get the object that matches the headerKey and then update the historyValue array:
let sampledata = [{
headerKey: "FirstName",
value: "Dave",
}, {
headerKey: "LastName",
value: "K",
},
{
headerKey: "NotExist",
value: "someVal",
}]
let addHere = [{
headerKey: 'FirstName',
historyValue: ['abc', 'ghi', 'sss']
},
{
headerKey: 'LastName',
historyValue: ['oo', 'ppp', 'qqqq']
}
];
sampledata.forEach((item)=>{
var existItem = addHere.find(({headerKey}) => headerKey === item.headerKey);
if(existItem){
//if you want to insert that in index 0
//else use existItem.historyValue.push(item.value);
existItem.historyValue.splice(0, 0, item.value);
} else {
addHere.push({
headerKey: item.headerKey,
historyValue: [item.value]
});
}
});
console.log(addHere);answered Nov 23 '18 at 8:15
Ankit Agarwal
23.7k52044
Thanks what if there is no value in addhere exist and i want to make a new one from sample data?
– mave
Nov 23 '18 at 8:52
@mave updated the answer. check it
– Ankit Agarwal
Nov 23 '18 at 8:53
add a comment |
0
0
0
You can use a forEach() loop and inside that find the existing object in addHere array to get the object that matches the headerKey and then update the historyValue array:
let sampledata = [{
headerKey: "FirstName",
value: "Dave",
}, {
headerKey: "LastName",
value: "K",
},
{
headerKey: "NotExist",
value: "someVal",
}]
let addHere = [{
headerKey: 'FirstName',
historyValue: ['abc', 'ghi', 'sss']
},
{
headerKey: 'LastName',
historyValue: ['oo', 'ppp', 'qqqq']
}
];
sampledata.forEach((item)=>{
var existItem = addHere.find(({headerKey}) => headerKey === item.headerKey);
if(existItem){
//if you want to insert that in index 0
//else use existItem.historyValue.push(item.value);
existItem.historyValue.splice(0, 0, item.value);
} else {
addHere.push({
headerKey: item.headerKey,
historyValue: [item.value]
});
}
});
console.log(addHere);answered Nov 23 '18 at 8:15
Ankit Agarwal
23.7k52044
You can use a forEach() loop and inside that find the existing object in addHere array to get the object that matches the headerKey and then update the historyValue array:
let sampledata = [{
headerKey: "FirstName",
value: "Dave",
}, {
headerKey: "LastName",
value: "K",
},
{
headerKey: "NotExist",
value: "someVal",
}]
let addHere = [{
headerKey: 'FirstName',
historyValue: ['abc', 'ghi', 'sss']
},
{
headerKey: 'LastName',
historyValue: ['oo', 'ppp', 'qqqq']
}
];
sampledata.forEach((item)=>{
var existItem = addHere.find(({headerKey}) => headerKey === item.headerKey);
if(existItem){
//if you want to insert that in index 0
//else use existItem.historyValue.push(item.value);
existItem.historyValue.splice(0, 0, item.value);
} else {
addHere.push({
headerKey: item.headerKey,
historyValue: [item.value]
});
}
});
console.log(addHere);let sampledata = [{
headerKey: "FirstName",
value: "Dave",
}, {
headerKey: "LastName",
value: "K",
},
{
headerKey: "NotExist",
value: "someVal",
}]
let addHere = [{
headerKey: 'FirstName',
historyValue: ['abc', 'ghi', 'sss']
},
{
headerKey: 'LastName',
historyValue: ['oo', 'ppp', 'qqqq']
}
];
sampledata.forEach((item)=>{
var existItem = addHere.find(({headerKey}) => headerKey === item.headerKey);
if(existItem){
//if you want to insert that in index 0
//else use existItem.historyValue.push(item.value);
existItem.historyValue.splice(0, 0, item.value);
} else {
addHere.push({
headerKey: item.headerKey,
historyValue: [item.value]
});
}
});
console.log(addHere);let sampledata = [{
headerKey: "FirstName",
value: "Dave",
}, {
headerKey: "LastName",
value: "K",
},
{
headerKey: "NotExist",
value: "someVal",
}]
let addHere = [{
headerKey: 'FirstName',
historyValue: ['abc', 'ghi', 'sss']
},
{
headerKey: 'LastName',
historyValue: ['oo', 'ppp', 'qqqq']
}
];
sampledata.forEach((item)=>{
var existItem = addHere.find(({headerKey}) => headerKey === item.headerKey);
if(existItem){
//if you want to insert that in index 0
//else use existItem.historyValue.push(item.value);
existItem.historyValue.splice(0, 0, item.value);
} else {
addHere.push({
headerKey: item.headerKey,
historyValue: [item.value]
});
}
});
console.log(addHere);answered Nov 23 '18 at 8:15
Ankit Agarwal
23.7k52044
edited Nov 23 '18 at 8:53
answered Nov 23 '18 at 8:15
Ankit Agarwal
23.7k52044
answered Nov 23 '18 at 8:15
Ankit Agarwal
23.7k52044
answered Nov 23 '18 at 8:15
Ankit Agarwal
23.7k52044
23.7k52044
Thanks what if there is no value in addhere exist and i want to make a new one from sample data?
– mave
Nov 23 '18 at 8:52
@mave updated the answer. check it
– Ankit Agarwal
Nov 23 '18 at 8:53
add a comment |
Thanks what if there is no value in addhere exist and i want to make a new one from sample data?
– mave
Nov 23 '18 at 8:52
@mave updated the answer. check it
– Ankit Agarwal
Nov 23 '18 at 8:53
Thanks what if there is no value in addhere exist and i want to make a new one from sample data?
– mave
Nov 23 '18 at 8:52
Thanks what if there is no value in addhere exist and i want to make a new one from sample data?
– mave
Nov 23 '18 at 8:52
@mave updated the answer. check it
– Ankit Agarwal
Nov 23 '18 at 8:53
@mave updated the answer. check it
– Ankit Agarwal
Nov 23 '18 at 8:53
add a comment |
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