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Vim: insert the same characters across multiple lines
...to the n in name.
Enter visual block mode (Ctrlv).
Press j three times (or 3j).
Press I (capital i).
Type in vendor_. Note: It will only update the screen in the first line - until Esc is pressed (6.), at which point all lines will be updated.
Press Esc.
An uppercase I must be used rather than a...
How to get last items of a list in Python?
...re's an example using the python CLI interpreter:
>>> a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
>>> a
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
>>> a[-9:]
[4, 5, 6, 7, 8, 9, 10, 11, 12]
the important line is a[-9:]
...
namespaces for enum types - best practices
...
Original C++03 answer:
The benefit from a namespace (over a class) is that you can use using declarations when you want.
The problem with using a namespace is that namespaces can be expanded elsewhere in the code. In a large project, y...
Best way to use PHP to encrypt and decrypt passwords? [duplicate]
... ' string to be encrypted '; // note the spaces
To Encrypt:
$iv = mcrypt_create_iv(
mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC),
MCRYPT_DEV_URANDOM
);
$encrypted = base64_encode(
$iv .
mcrypt_encrypt(
MCRYPT_RIJNDAEL_128,
hash('sha256', $key, true),
...
CSS3 Rotate Animation
Cannot get this animated image to work, it is supposed to do a 360 degrees rotation.
6 Answers
...
What are rvalues, lvalues, xvalues, glvalues, and prvalues?
In C++03, an expression is either an rvalue or an lvalue .
11 Answers
11
...
How can mixed data types (int, float, char, etc) be stored in an array?
... element, you would do:
my_array[0].type = is_int;
my_array[0].val.ival = 3;
When you want to access an element of the array, you must first check the type, then use the corresponding member of the union. A switch statement is useful:
switch (my_array[n].type) {
case is_int:
// Do stuff for ...
How to check if a variable is a dictionary in Python?
...
300
You could use if type(ele) is dict or use isinstance(ele, dict) which would work if you had s...
Python add item to the tuple
...
308
You need to make the second element a 1-tuple, eg:
a = ('2',)
b = 'z'
new = a + (b,)
...