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Differences between std::make_unique and std::unique_ptr with new
...of new you have to remember the rule about not using unnamed temporaries.
foo(make_unique<T>(), make_unique<U>()); // exception safe
foo(unique_ptr<T>(new T()), unique_ptr<U>(new U())); // unsafe*
The addition of make_unique finally means we can tell people to 'never' use ...
How to test that no exception is thrown?
...throws Exception }
and then your code becomes simply:
@Test
public void foo(){
MyAssertions.assertDoesNotThrow(() -> {
//execute code that you expect not to throw Exceptions.
}
}
If you dont have access to Java-8, I would use a painfully old java facility: aribitrary code blocks and ...
Connect Java to a MySQL database
...ection conn = DriverManager.getConnection
("jdbc:mysql://localhost:3306/foo", "root", "password");
Statement stmt = conn.createStatement();
stmt.execute("SELECT * FROM `FOO.BAR`");
stmt.close();
conn.close();
Add exception handling, configuration etc. to taste.
...
What is the purpose of python's inner classes?
...on, all statements are executable. That means that this statement:
class foo(object):
pass
is a statement that is executed at runtime just like this one:
x = y + z
This means that not only can you create classes within other classes, you can create classes anywhere you want to. Consider ...
Executing multi-line statements in the one-line command-line?
...ith Python 3.x as well, print is called as a function: in 3.x, only print('foo') works, whereas 2.x also accepts print 'foo'.
- For a cross-platform perspective that includes Windows, see kxr's helpful answer.
In bash, ksh, or zsh:
Use an ANSI C-quoted string ($'...'), which allows using \n to rep...
MySQL indexes - what are the best practices?
... to the first "%". In other words, if you're SELECTing WHERE column LIKE 'foo%bar%', the database will use the index to find all the rows where column starts with "foo", and then need to scan that intermediate rowset to find the subset that contains "bar". SELECT ... WHERE column LIKE '%bar%' can'...
How to revert a Git Submodule pointer to the commit stored in the containing repository?
...f46a45a4a0d337 sm2
$ cd sm2
$ git log --oneline --decorate
5b8d48f (HEAD, foo1) foo1.1
f68bed6 (origin/master, origin/HEAD, master) Initial commit.
$ git checkout master
Switched to branch 'master'
$ cd ..
$ git status
# On branch master
nothing to commit (working directory clean)
The "superproje...
What's the use of Jade or Handlebars when writing AngularJs apps
... -->
<body ng-controller="MyController">
<input ng-model="foo" value="bar">
<!-- Button tag with ng-click directive, and string expression 'buttonText' wrapped in "{{ }}" markup -->
<button ng-click="changeFoo()">{{buttonText}}</button>
<script src="...
What are the differences between .gitignore and .gitkeep?
...ht be upset. Using !.gitignore prevents you from shooting yourself in your foot. I prefer it, having burned myself in the past.
– sjas
May 13 '14 at 14:44
...
When should I use the new keyword in C++?
...ed on the heap has to be manually deleted by you.
Here's an example:
void foo() {
bar b;
bar* b2 = new bar();
}
This function creates three values worth considering:
On line 1, it declares a variable b of type bar on the stack (automatic duration).
On line 2, it declares a bar pointer b2 on...