feat(NgFor): $last property support #3991
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alfonso-presa
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| @@ -76,6 +77,10 @@ export class NgFor { | |||
| for (var i = 0; i < insertTuples.length; i++) { | |||
| this._perViewChange(insertTuples[i].view, insertTuples[i].record); | |||
| } | |||
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| for (var i = 0, ilen = this.viewContainer.length; i < ilen; i++) { | |||
| this.viewContainer.get(i).setLocal('last', i === ilen - 1); | |||
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What about doing it in _perViewChange() to avoid having to iterate twice ?
ie view.setLocal('last', record.currentIndex === this.viewContainer.length - 1);
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That was my very first approach, but it made this expect fail because becoming (and also stop being) the last child of the collection is not considered to be a change by the DefaultIterableDiffer (and I think that's fair) and so the item is not included in the insertTuples.
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Oh right _perViewChange() is only called on records whose indexes have changed.
then LGTM, thanks.
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Makes a new `$last` property available during the loop with a boolean showing if it's the last item in the iteration. closes: angular#3102
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vicb
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pr_state: LGTM
area: common
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Merging PR #3991 on behalf of @vicb to branch presubmit-vicb-pr-3991. |
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Makes a new
$lastproperty available during the loop with a booleanshowing if it's the last item in the iteration.
closes: #3102