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I am not a programmer and am self-taught so I may lack the language to ask this appropriately (perhaps why an rseek search was unfruitful). Let's say I saved a file to my desktop called foo.pdf. Then I want R to return the file path of foo.pdf (pretend I don't know the location(path) of foo.pdf). Question: How would I get R to return the unknown file path for foo.pdf. I

...9; if something manually changes the local files. So using the cache option wouldn't be recommended for users that don't know whats going on. However it can be enabled manually under the right cicumstances. Maybe it's even possible to do some extra checks on directory ctimes in the maindir or some other checks. -What are the opinions of other people on this list? -Would it be easy to implement, or would it give too much trouble? -What are the most likely problems i would run into when i try to implement this? -Any ideas on WHERE to store such a cache? (a magic hidden file in the...