...e no real advantage to having a surrogate key. Having a primary key on (col1,col2) is guaranteed unique (assuming your col1 and col2 values in the referenced tables are unique) and a separate index on (col2,col1) will catch those cases where the opposite order would execute faster. The surrogate is ...

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...ch were made after the selected revision (in your example rev. 96,97,98,99,100) Your working copy is now in modified state. The file content of both scenarions is same, however in first case you have an unmodified working copy and you cannot commit your changes(as your workingcopy is not pointing ...

...ameter -t to sort by time. You can then grab the first (newest) with head -1. ls -t b2* | head -1 But beware: Why you shouldn't parse the output of ls My personal opinion: parsing ls is only dangerous when the filenames can contain funny characters like spaces or newlines. If you can guarantee t...

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...d exit -h [ --host ] arg mongo host to connect to ( <set name>/s1,s2 for sets) --port arg server port. Can also use --host hostname:port --ipv6 enable IPv6 support (disabled by default) -u [ --username ] arg username -p [ --password ] arg ...

... | edited Nov 28 '19 at 14:15 answered May 14 '10 at 14:06 ...

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We now have C++11 with many new features. An interesting and confusing one (at least for me) is the new nullptr . 14 Answe...