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... FooInterface的析构函数~FooInterface()必须是virtual的 在第13行,我们得把getArbitraryString定义为纯虚函数。其实getArbitraryString()也不一定得是纯虚函数,这点我们后面会提到. 现在我们用Google Mock来定义Mock类 FooMock.h #ifndef MO...
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Which SQL query is faster? Filter on Join criteria or Where clause?

...LEFT JOIN TableXRef x ON x.TableAID = a.ID AND a.ID = 1 LEFT JOIN TableB b ON x.TableBID = b.ID or this: SELECT * FROM TableA a LEFT JOIN TableXRef x ON x.TableAID = a.ID LEFT JOIN TableB b ON b.id = x.TableBID WHERE a.id = 1 The...
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java.net.ConnectException: localhost/127.0.0.1:8080 - Connection refused

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Extract first item of each sublist

... 201 Using list comprehension: >>> lst = [['a','b','c'], [1,2,3], ['x','y','z']] >>&g...
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How to get the primary IP address of the local machine on Linux and OS X? [closed]

...ould return me the primary (first) IP address of the localhost, other than 127.0.0.1 31 Answers ...
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Email Address Validation in Android on EditText [duplicate]

... | edited Feb 21 at 13:14 milosmns 2,53933 gold badges2727 silver badges3838 bronze badges an...
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How to run crontab job every week on Sunday

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How to output only captured groups with sed?

...e output as well as specifying what you do want. string='This is a sample 123 text and some 987 numbers' echo "$string" | sed -rn 's/[^[:digit:]]*([[:digit:]]+)[^[:digit:]]+([[:digit:]]+)[^[:digit:]]*/\1 \2/p' This says: don't default to printing each line (-n) exclude zero or more non-digits i...
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How can I convert a DateTime to the number of seconds since 1970?

...t a C# DateTime variable to Unix time, ie, the number of seconds since Jan 1st, 1970. It looks like a DateTime is actually implemented as the number of 'ticks' since Jan 1st, 0001. ...
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Why does (0 < 5 < 3) return true?

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