ng-select-rocks

# where user_roles is an array filled with strings
# option's value and text will both be role

<select ng-model="selectedUser.role" ng-options="role for role in user_roles">
</select>

# where supported_languages is an array filled with objects
# option's value will be language.code and option's text will be language.label

<select ng-model="selectedUser.language_code"
ng-options="language.code as language.label for language in supported_languages">
</select>