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How can I check whether an array is null / empty?
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ArrayUtils.isNotEmpty(testArrayName) from the package org.apache.commons.lang3 ensures Array is not null or empty
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Saving an Object (Data persistence)
... to show how more than one object could be saved into (and later read back from) the same file.
– martineau
Dec 25 '10 at 9:57
1
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What does template mean?
...x = N;
In fact, we can create algorithms which evaluate at compile time (from Wikipedia):
template <int N>
struct Factorial
{
enum { value = N * Factorial<N - 1>::value };
};
template <>
struct Factorial<0>
{
enum { value = 1 };
};
// Factorial<4>::value...
Could not load file or assembly 'xxx' or one of its dependencies. An attempt was made to load a prog
I just checked out a revision from Subversion to a new folder. Opened the solution and I get this when run:
9 Answers
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Remove non-utf8 characters from string
Im having a problem with removing non-utf8 characters from string, which are not displaying properly. Characters are like this 0x97 0x61 0x6C 0x6F (hex representation)
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URL encoding in Android
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You don't encode the entire URL, only parts of it that come from "unreliable sources".
String query = URLEncoder.encode("apples oranges", "utf-8");
String url = "http://stackoverflow.com/search?q=" + query;
Alternatively, you can use Strings.urlEncode(String str) of DroidParts that...
What does “xmlns” in XML mean?
... that needs to be unique so as to indicate that it is a separate namespace from others and any potential duplicate tags will therefore be interpreted correctly. So the URI will often point to nothing.
– foochow
Jan 27 '14 at 19:52
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The command rbenv install is missing
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The install command is not embedded into rbenv, it comes from the ruby-build plugin. You can install it using the command:
git clone https://github.com/rbenv/ruby-build.git "$(rbenv root)"/plugins/ruby-build
On Mac OS X you can install it through homebrew:
brew install ruby-bui...
Why isn't `int pow(int base, int exponent)` in the standard C++ libraries?
...s based, also had no use for powers (it didn't have floating point at all, from memory).
As an aside, an integral power operator would probably have been a binary operator rather than a library call. You don't add two integers with x = add (y, z) but with x = y + z - part of the language proper ...
Convert Array to Object
...ign() method is used to copy the values of all
enumerable own properties from one or more source objects to a target
object. It will return the target object.
Object.assign({}, ['a','b','c']); // {0:"a", 1:"b", 2:"c"}
The own length property of the array is not copied because it isn't enumer...