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Are C# events synchronous?
...;int, string>, nothing fancy here.
Now the interesting parts are:
add_OnCall(Func<int, string>)
remove_OnCall(Func<int, string>)
and how OnCall is invoked in Do()
How is Subscribing and Unsubscribing Implemented?
Here's the abbreviated add_OnCall implementation in CIL. The inter...
Where does Scala look for implicits?
... support m. A simple example would be the method map on String:
"abc".map(_.toInt)
String does not support the method map, but StringOps does, and there's an implicit conversion from String to StringOps available (see implicit def augmentString on Predef).
Implicit Parameters
The other kind of ...
Adding a new value to an existing ENUM Type
...he new type.
-- 1. rename the enum type you want to change
alter type some_enum_type rename to _some_enum_type;
-- 2. create new type
create type some_enum_type as enum ('old', 'values', 'and', 'new', 'ones');
-- 3. rename column(s) which uses our enum type
alter table some_table rename column some...
Why is it string.join(list) instead of list.join(string)?
...ct, set), but the result and the "joiner" must be strings.
For example:
'_'.join(['welcome', 'to', 'stack', 'overflow'])
'_'.join(('welcome', 'to', 'stack', 'overflow'))
'welcome_to_stack_overflow'
Using something else than strings will raise the following error:
TypeError: sequence item 0...
Underscore prefix for property and method names in JavaScript
...d variable to be private was accepted. Chrome 74 ships with this support.
_ prefixed variable names are considered private by convention but are still public.
This syntax tries to be both terse and intuitive, although it's rather different from other programming languages.
Why was the sig...
Private and Protected Members : C++
...ou want the derived classes to be able to see.
class A
{
private:
int _privInt = 0;
int privFunc(){return 0;}
virtual int privVirtFunc(){return 0;}
protected:
int _protInt = 0;
int protFunc(){return 0;}
public:
int _publInt = 0;
int publFunc()
{
return privV...
How to take the first N items from a generator or list in Python? [duplicate]
...:step]
Slicing a generator
import itertools
top5 = itertools.islice(my_list, 5) # grab the first five elements
You can't slice a generator directly in Python. itertools.islice() will wrap an object in a new slicing generator using the syntax itertools.islice(generator, start, stop, step)
Rem...
Multiple Inheritance in PHP
...
This is both a question and a solution....
What about the magical _call(),_get(), __set() methods? I have not yet tested this solution but what if you make a multiInherit class. A protected variable in a child class could contain an array of classes to inherit. The constructor in the multi-...
Change MySQL default character set to UTF-8 in my.cnf?
...utf8
[mysql]
default-character-set=utf8
[mysqld]
collation-server = utf8_unicode_ci
init-connect='SET NAMES utf8'
character-set-server = utf8
If you want to change the character set for an existing DB, let me know... your question didn't specify it directly so I am not sure if that's what you w...
How can javascript upload a blob?
...hp:
<?
// pull the raw binary data from the POST array
$data = substr($_POST['data'], strpos($_POST['data'], ",") + 1);
// decode it
$decodedData = base64_decode($data);
// print out the raw data,
echo ($decodedData);
$filename = "test.txt";
// write the data out to the file
$fp = fopen($filena...