How do I iterate nested arrays in a React component?
19,108
Solution 1
One way to do it
var arr = [ [ 2, 3, 4, 5, 6, 7 ],
[ 8, 9, 10, 11, 12, 13 ],
[ 14, 15, 16, 17, 18, 19 ],
[ 20, 21, 22, 23, 24, 25 ],
[ 26, 27, 28, 29, 30, 31 ],
[ 32, 33, 34, 35, 36, 37 ],
[ 38, 39, 40, 41, 42, 43 ],
[ 44, 45, 46, 47, 48, 49 ],
[ 50, 51, 52, 53, 54, 55 ],
[ 56, 57, 58, 59, 60, 61 ],
[ 62, 63, 64, 65, 66, 67 ],
[ 68, 69, 70, 71, 72, 73 ],
[ 74, 75, 76, 77, 78, 79 ],
[ 80, 81, 82, 83, 84, 85 ],
[ 86, 87, 88, 89, 90, 91 ],
[ 92, 93, 94, 95, 96, 97 ],
[ 98, 99, 100, 101, 102, 103 ],
[ 104, 105, 106, 107, 108, 109 ] ];
var Hello = React.createClass({
tablerows: function() {
return this.props.arr.map(rows => {
var row = rows.map(cell => <td>{cell}</td>);
return <tr>{row}</tr>;
});
},
render: function() {
return <table>{this.tablerows()}</table>;
}
});
ReactDOM.render(
<Hello arr={arr} />,
document.getElementById('container')
);
In action: https://jsfiddle.net/69z2wepo/30476/
Solution 2
I would suggest separating the components to Resultset
, NumberComponent
and try to be consistent with the arrow functions.
// Explicit return
const NumberComponent = props => {
return (
<td>{ props.number }</td>
)
}
const Resultset = props => {
return (
<tr>
{
props.rows.map( number => <NumberComponent number={number} />)
}
</tr>
)
}
// Implicit return
const NumberComponent = props => (<td>{ props.number }</td>);
const Resultset = props => (
<tr>
{
props.rows.map( number => <NumberComponent number={number} />)
}
</tr>
);
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Author by
GreenTriangle
Updated on June 04, 2022Comments
-
GreenTriangle about 2 years
I have a multidimensional array: an array
results
containing 18 arraysrow
, each containing 6 numbers.I want to render this as a table. The logic would be
results.each as (row) <tr> row.each as (number) <td>number</td> </tr>
But I can't figure out how you'd write this in JSX.
const Resultset = props => ( {props.rows.map(rows => { <tr> {rows.map(number => <td>{number}</td>)} </tr> })} );
But that's not right. What's the procedure for this, how do you nest the map calls and interpolations?