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[ListView] Make LVDS.getSectionLengths() be indexed by section ID #100

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[ListView] Make LVDS.getSectionLengths() be indexed by section ID #100

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10 changes: 6 additions & 4 deletions Libraries/Components/ListView/ListViewDataSource.js
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Original file line number Diff line number Diff line change
Expand Up @@ -245,12 +245,14 @@ class ListViewDataSource {
}

/**
* Returns an array containing the number of rows in each section
* Returns a mapping from sectionIDs to the number of rows in each respective
* section
*/
getSectionLengths(): Array<number> {
var results = [];
getSectionLengths(): {[key: string], number} {
var results = {};
for (var ii = 0; ii < this.sectionIdentities.length; ii++) {
results.push(this.rowIdentities[ii].length);
var sectionID = this.sectionIdentities[ii];
results[sectionID] = this.rowIdentities[ii].length;
}
return results;
}
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