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Check for installed packages before running install.packages() [duplicate]
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155
try: require("xtable") or "xtable" %in% rownames(installed.packages())
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How to create ASP.NET Web API Url?
...Darin DimitrovDarin Dimitrov
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Access to private inherited fields via reflection in Java
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edited Dec 3 '19 at 15:48
answered Aug 25 '10 at 15:14
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Should I use Java date and time classes or go with a 3rd party library like Joda Time?
....org/threetenbp
– Miscreant
Sep 11 '15 at 7:57
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Which is best way to define constants in android, either static class, interface or xml resource?
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Dheeresh SinghDheeresh Singh
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List comprehension with if statement
...vajit PathakVishvajit Pathak
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Encoding an image file with base64
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answered Sep 15 '10 at 7:31
Jim BrissomJim Brissom
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When should I use perror(“…”) and fprintf(stderr, “…”)?
... due to out of range, I would use perror.
– freeboy1015
Aug 24 '12 at 2:22
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Amazon S3 boto - how to create a folder?
...ta data from them.
– phazei
Jul 11 '15 at 6:10
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What's the point of const pointers?
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answered Oct 10 '11 at 15:56
tenfourtenfour
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