How can i get the specific array using Lodash in react js - lodash

Question

How can i get the specific array using Lodash in react js ?
I have an array of objects, 10 topUsers.
data:{
"topUsers":[
{
"user":"foo"
},
{
"user":"bar"
},
{
"user":"mike"
},
{
"user":"jen"
},
{
"user":"carl"
},
{
"user":"ben"
},
{
"user":"tony"
},
{
"user":"mark"
},
{
"user":"peter"
},
{
"user":"jake"
}
]}
and I want to display start from top 5 which is "user":"carl", assume the {idx} is the index of array
I'am try to use the _.map for mapping the data, but for specific index or array I dont have any idea.
<TableBody displayRowCheckbox={false} style={{minHeight: 65}}>
{ _.map(this.state.data.topUsers, (users, idx) => { return(
<TableRow displayBorder={true}>
<TableRowColumn style={{height: 75 , textAlign: 'center'}}>{idx + 1}</TableRowColumn>
<TableRowColumn style={{ justifyContent: 'center', textAlign: 'center' , paddingLeft: '5px' }}>
<Col xs={12}>
<Row>
<Col xs={4} style={{display: 'flex', justifyContent: 'center', alignItems: 'center'}}>
<label style={{whiteSpace: 'normal', overflow: 'hidden', textOverflow: 'ellipsis'}}>
{_.get(users, 'users', ' ')}
</label>
</Col>
</Row>
</Col>
</TableRowColumn>
</TableRow>) })}

Answer 1

You can use Array#slice (or lodash's equivalent) to slice the array from an index to the end. So arr.slice(4), will create a new array from the 5th (0 based) item to the end.
Btw - if you want the 5 top items, you need to slice from index 5. Slicing from the 4th index will give you 6 items.
For example:
const topUsers = [{"user":"foo"},{"user":"bar"},{"user":"mike"},{"user":"jen"},{"user":"carl"},{"user":"ben"},{"user":"tony"},{"user":"mark"},{"user":"peter"},{"user":"jake"}];
const result = topUsers.slice(5)
.map(({ user }) => user); // whatever you want to map user into
console.log(result);
And in your case:
<TableBody displayRowCheckbox={false} style={{minHeight: 65}}>
{ this.state.data.topUsers.slice(5).map((users, idx) => { return(
<TableRow displayBorder={true}>
<TableRowColumn style={{height: 75 , textAlign: 'center'}}>{idx + 1}</TableRowColumn>
<TableRowColumn style={{ justifyContent: 'center', textAlign: 'center' , paddingLeft: '5px' }}>
<Col xs={12}>
<Row>
<Col xs={4} style={{display: 'flex', justifyContent: 'center', alignItems: 'center'}}>
<label style={{whiteSpace: 'normal', overflow: 'hidden', textOverflow: 'ellipsis'}}>
{_.get(users, 'users', ' ')}
</label>
</Col>
</Row>
</Col>
</TableRowColumn>
</TableRow>) })}

Answer 2

you can try _.slice(array, [start=0], [end=array.length])
To learn more, see enter link description here