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NoSql vs Relational database
...uge data volumes of Terabytes & Peta bytes. Even if you have Redundant Array of Independent/Inexpensive Disks (RAID) & data shredding, it does not scale well for huge volume of data. You require very expensive hardware.
Logging: Assembling log records and tracking down all changes in databa...
Localization and internationalization, what's the difference?
...rance/etc...
Translation function works with storage (db/files/associative array/etc).
Storage contains keys which is ussed in coode, and values, which is texts in certain language which application supports.
Localization - it is process of adding new values in new language (for example spain) appr...
How to use ArrayAdapter
... but don't know how to show both reason and long_val in the ListView using ArrayAdapter.
5 Answers
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What is the 'pythonic' equivalent to the 'fold' function from functional programming?
...
The Pythonic way of summing an array is using sum. For other purposes, you can sometimes use some combination of reduce (from the functools module) and the operator module, e.g.:
def product(xs):
return reduce(operator.mul, xs, 1)
Be aware that redu...
Fastest method to replace all instances of a character in a string [duplicate]
...ty comes from the behavior of split -- if you split on an empty string, an array of each of the characters is returned. Logically its as if there is an empty string between each character. It also matches a regex zero length match. The nitpicky among us might wonder why there is only one empty st...
String was not recognized as a valid DateTime “ format dd/MM/yyyy”
... in the format pattern. There's an overload of ParseExact that accepts an array of format patterns and will parse the text if it matches any of them.
– Samuel Neff
Feb 27 '12 at 2:22
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Can I multiply strings in Java to repeat sequences? [duplicate]
...nt i = 3;
String someNum = "123";
// Way 1:
char[] zeroes1 = new char[i];
Arrays.fill(zeroes1, '0');
String newNum1 = someNum + new String(zeroes1);
System.out.println(newNum1); // 123000
// Way 2:
String zeroes2 = String.format("%0" + i + "d", 0);
String newNum2 = someNum + zeroes2;
System.out.pr...
When should you not use virtual destructors?
...ly only says that if you were to copy from an object with POD type into an array of chars (or unsigned chars) and back again, then the result will be the same as the original object.]
Modern C++
In recent versions of C++, the concept of POD was split between the class layout and its construction, ...
What is more efficient: Dictionary TryGetValue or ContainsKey+Item?
...is.FindEntry(key) >= 0);
}
so TryGetValue is just ContainsKey plus an array lookup if the item is present.
Source
It appears that TryGetValue will be almost twice as fast as ContainsKey+Item combination.
share
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CAP theorem - Availability and Partition Tolerance
...e more esoteric hardware exists ( look up SQL NON-STOP ), examples of RAID arrays with failing and resuming components are still common these days, and provide very high availability in a single server.
– Brian Bulkowski
Apr 7 at 21:55
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