Re: Bug in "Find Previous"

*To*: mathgroup at smc.vnet.net*Subject*: [mg127496] Re: Bug in "Find Previous"*From*: Helen Read <readhpr at gmail.com>*Date*: Mon, 30 Jul 2012 03:45:24 -0400 (EDT)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*Delivered-to*: l-mathgroup@wolfram.com*Delivered-to*: mathgroup-newout@smc.vnet.net*Delivered-to*: mathgroup-newsend@smc.vnet.net*References*: <jv2nc9$meg$1@smc.vnet.net>

For me (8.0.4, Windows) it finds all the unquoted single n searching for Whole Words with Find Next. It doesn't get either 'n' or "n" which one could argue either way. Using Find Previous, the Whole Words match seems quite flaky. It does find the single n with or without quotes, but it also picks out the n in some but not all words containing n. For example, it skips "found" and "definition" but hits the n in the "in" "And" and "any". It skips the n in the unquoted "not" but hits the n in the quoted "not". I also tried appending the following to your text: Now search Whole Words for instances of not. Did you notice it misses some cases of 'not' with Find Previous? Then I searched for Whole Word matches 'not' with Find Next and Find Previous. Find Next gets all of the unquoted instances of 'not' and correctly skips over 'notice'. Find Previous also skips over 'notice' as it should, and hits all the quoted and unquoted instances of not until it gets to the one with double quotes, and then it stops and does not hit the two preceding cases. Turning off the Whole Words match gets all instances of 'not' whether quoted or unquoted (including the substring of 'notice') searching in either direction. It seems that the Whole Words mode is a bit unreliable. Helen Read On 7/29/2012 3:05 AM, James Stein wrote: > Copy these seven lines into a cell as "Plain Text", > (NOT as the default "Mathematica Input"). > Test searching for n as a single word (not in "not", e.g.). > You should find this n but not any 'n' in not any ! > Do you see the difference searching forward or backward? > And what is the definition of 'word' in 'Full Word'? > Why is this 'n' not found? What about "n"? > > This bug may be platform specific. > I'm running Mathematica 8.0.4 on Mac OS X 10.6.8. >