ng-repeat ng-options and differences

ng-repeat ="x in XXX"

ng-options="x.*** for x in XXX“

ng-repeat wording

<select>

<option ng-repeat ="x in XXX"></option>

</select>

ng-options wording must add ng-model

<select ng-model="xxxx" ng-options="y.xxx for y in XXX">

</select>

ng-repeat ="x in XXX"

ng-options="x.*** for x in XXX“

ng-repeat wording

<select>

<option ng-repeat ="x in XXX"></option>

</select>

ng-options wording must add ng-model

<select ng-model="xxxx" ng-options="y.xxx for y in XXX">

</select>