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Applications are expected to have a root view controller at the end of application launch
... now creates the main.m file. For example: #import "AppDelegate.h and then int retVal = UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
– sho
Dec 21 '11 at 7:58
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PostgreSQL: insert from another table
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Just supply literal values in the SELECT:
INSERT INTO TABLE1 (id, col_1, col_2, col_3)
SELECT id, 'data1', 'data2', 'data3'
FROM TABLE2
WHERE col_a = 'something';
A select list can contain any value expression:
But the expressions in the select list do not have to ref...
How do you exit from a void function in C++?
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Even more to the point: you must NOT specify any return value if your method returns void.
– Jonathan Leffler
Apr 19 '09 at 20:16
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String literals: Where do they go?
I am interested in where string literals get allocated/stored.
8 Answers
8
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Are std::vector elements guaranteed to be contiguous?
...ctor elements guaranteed to be contiguous? In order word, can I use the pointer to the first element of a std::vector as a C-array?
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What's the difference between the 'ref' and 'out' keywords?
...@faulty: No, ref is not only applicable to value types. ref/out are like pointers in C/C++, they deal with the memory location of the object (indirectly in C#) instead of the direct object.
– thr
Mar 15 '10 at 6:53
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Changing the “tick frequency” on x or y axis in matplotlib?
...thon's range function just in case min(x) and max(x) are floats instead of ints.)
The plt.plot (or ax.plot) function will automatically set default x and y limits. If you wish to keep those limits, and just change the stepsize of the tick marks, then you could use ax.get_xlim() to discover what ...
Deprecated ManagedQuery() issue
...contentUri, proj, null, null, null);
if(cursor.moveToFirst()){;
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
res = cursor.getString(column_index);
}
cursor.close();
return res;
}
...
PDO closing connection
...ion $e) {
throw new PDOException($e->getMessage(), (int) $e->getCode());
}
}
return self::$_instance;
}
public static function closeInstance() {
return self::$_instance = null;
}
}
}
$req = PDO2...
How to access the last value in a vector?
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To answer this not from an aesthetical but performance-oriented point of view, I've put all of the above suggestions through a benchmark. To be precise, I've considered the suggestions
x[length(x)]
mylast(x), where mylast is a C++ function implemented through Rcpp,
tail(x, n=1)
dplyr::las...