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I am new to angularJs, and am in the process of migrating an 0.9 versioned angularJs app to 1.0.5 version. I am stuck at a function named '$add' called on an array. I have searched in the docs for hours, but no use. Can anyone enlighten me regarding this? Also will be nicer to understand the significance/specialty of '$xxx' keyword usage within angular.

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I believe the $add function was removed. You can replace it by the native Array push() function (they were basically the same).

Regarding the usage of $, the angularjs documentation states:

To prevent accidental name collision, Angular prefixes names of objects which could potentially collide with $. Please do not use the $ prefix in your code as it may accidentally collide with Angular code.

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