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Add keys to iterators

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This commit is contained in:
Daniel Barber 2016-12-07 23:24:27 +00:00
parent bf38a9b86c
commit dab37155e4
1 changed files with 6 additions and 4 deletions
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10
app/components/chess-board.js
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@ -10,10 +10,12 @@ class ChessBoard extends React.Component {
this.state = defaultState;
}
chessBoardRow(row) {
chessBoardRow(row, i) {
return (
<div className="board-row">
{row.map((square) => <ChessBoardSquare square={square} />)}
<div className="board-row" key={i}>
{row.map(
(square, j) => <ChessBoardSquare key={j} square={square} />
)}
</div>
)
}
@ -21,7 +23,7 @@ class ChessBoard extends React.Component {
render() {
return (
<div className="board">
{this.state.board.map((row) => this.chessBoardRow(row))}
{this.state.board.map((row, i) => this.chessBoardRow(row, i))}
</div>
);
}