React-native update datasource

Question

I found similar questions but nothing works. If I click a list item I get error "undefined is not a function this.state.datasource.slice()"

I try to make all "ordered" true

could you show all file content? – stereodenis Aug 26 '16 at 19:10 — stereodenis, Aug 26 '16 at 19:10

score 0 · Answer 1 · answered Aug 26 '16 at 18:28

0

Assuming you really want to slice your array -> Try:

this.state.dataSource.slice(1,2)

according to this you have to define a beginning and an end to slice like so:

arr.slice([begin[, end]])

answered Aug 26 '16 at 18:28

dv3

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If I remove slice I get "rowHasChange true "/n" defaultGetRowData true "/n" true "/n" defaultGetSectionHeaderData true "/n" and some more trues. (i put /n to show that its change line) check this link the accepted answer http://stackoverflow.com/questions/31738671/react-native-updating-list-view-datasource – ditsikts Aug 26 '16 at 19:07
What are you trying to achieve? hard to help you with just error messages and no guidance – dv3 Aug 26 '16 at 19:27
I try to change some values on datasource i this case to make all "ordered" ="true" – ditsikts Aug 26 '16 at 19:33

score 0 · Answer 2 · answered Apr 11 '17 at 03:34

If you looked at the ListView documentation, when you initialize the dataSource for your ListView component, you can supply a method that tells the ListView if the dataSource has changed, so that the ListView will re-render.

constructor() {
  super();
  const ds = new ListView.DataSource({rowHasChanged: (e1, e2) => e1 !== e2});
  this.state = {
    dataSource: ds.cloneWithRows([/* initial data */]),
  };
}

React-native update datasource

2 Answers2