What is the difference between apply(), applyComponents(), and foreach() ?

Question

Hi , 
 What is the difference between apply(), applyComponents(), and foreach() ? 
 Thanks 
 Aswini

Krishna Chaitanya · Answer

apply(): Call a function or a rule for each time which you have specified in a list. ex: 
 apply( sum(1,_), {1,2,3,4} ) 
 function will execute 4 times because length of list is 4,in place of sum() you can cal your own rules. 
 apply() cannot be used with rules or functions that store local data, including rules using load() and certain SAIL components. In these cases, we have to use a!applyComponents(). a!foreach() is also a looping function in previous versions it was not their so we have to go with apply() and a!applyComponents(), from 17.2 version we have a!foreach() ,it will do every thing which apply() and a!applyComponents() does.

Rama Thummala · Answer

Hi Aswini , have a look into below atricles. 
 apply() 
 applyComponents() 
 and forEach() . With my experience I would suggest to use forEach(). Appian might move apply() and applyComponents() functions to deprecated. 
 I hope , it will help you..