conditional with and operators

Hi,

I have a problem in which I am parsing data from a list.  I am simply trying to return data that has several
conditions being true.  Here is my syntax below:

d<-sapply(res,function(.df){(.df$TimesVisited[.df$Tick>912 && .df$Id>0])})   #res is the list, and I
am trying to return a result that has two true conditions (that is the variable Tick should be greate than
912 and Id should be greater than 0

This returns an array of 10 with integer values of 0. This is the incorrect result

However, if I do the same syntax except I remove the && statement (i.e. the second conditional), then the
result producing something that makes sense, which is all values that are Tick and greater than 912.

Can someone let me know how I can setup my data to be parsed so I can have 2 or multiple conditionals in my
function that is looking at an array.

Thanks in advance.

Mark

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