I need to check that new input which will be added to the dataSource is not contained in it already.
_handleSendButtonPress = () => {
const textArray = this.state.dataSource._dataBlob.s1;
// Here I need to check that this.state.inputValue is in textArray already
textArray.push(this.state.inputValue);
this.setState(() => ({
dataSource: this.state.dataSource.cloneWithRows(textArray),
inputValue: '',
}));
};
If I understand you correctly and textArray is indeed an array, this should work:
_handleSendButtonPress = () => {
const textArray = this.state.dataSource._dataBlob.s1;
!textArray.includes(this.state.inputValue) && (
textArray.push(this.state.inputValue);
this.setState(() => ({
dataSource: this.state.dataSource.cloneWithRows(textArray),
inputValue: '',
}));
)
};