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In C#, how to check if a TCP port is available?
... use a TcpClient or generally to connect to a socket how can I first check if a certain port is free on my machine?
19 Answ...
Create an empty list in python with certain size
...f the list. lst.append(something).
(You could use the assignment notation if you were using a dictionary).
Creating an empty list:
>>> l = [None] * 10
>>> l
[None, None, None, None, None, None, None, None, None, None]
Assigning a value to an existing element of the above list:...
Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)
... "127.0.0.1" the TCP/IP connector is used. You could try using "127.0.0.1" if the socket connector is not enabled/working.
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Struct constructor: “fields must be fully assigned before control is returned to the caller.”
...
If you see this error on a struct that has an automatic property, just call the parameterless contructor from your parameterized one by doing : this() example below:
struct MyStruct
{
public int SomeProp { get; set; }
p...
GetProperties() to return all properties for an interface inheritance hierarchy
...r.
public static PropertyInfo[] GetPublicProperties(this Type type)
{
if (type.IsInterface)
{
var propertyInfos = new List<PropertyInfo>();
var considered = new List<Type>();
var queue = new Queue<Type>();
considered.Add(type);
queu...
Purpose of ESI & EDI registers?
...few operations you can only do with DI/SI (or their extended counterparts, if you didn't learn ASM in 1985). Among these are
REP STOSB
REP MOVSB
REP SCASB
Which are, respectively, operations for repeated (= mass) storing, loading and scanning. What you do is you set up SI and/or DI to point at on...
How do I flush the cin buffer?
... course, this tells the code to ignore ALL characters until the amount specified. In the main example, it will ignore essentially until EOF (because INT_MAX is huge). As mentioned in the post, if you just want to ignore a single line, you need to specify an extra parameter of '\n to tell it you on...
Passing a method as a parameter in Ruby
... off the method.
def weightedknn(data, vec1, k = 5)
...
weight =
if block_given?
yield(dist)
else
gaussian.call(dist)
end
end
...
end
weightedknn(foo, bar) do |dist|
# square the dist
dist * dist
end
But it sounds like you would like more reusable chunks of c...
Using Core Data, iCloud and CloudKit for syncing and backup and how it works together
...ble even when the device is offline. You don't have to write any cloud-specific code, you just need to add listening for incoming changes (which is a lot like changes made on a different managed object context).
CloudKit is not related to Core Data. It's not a sync system, it's a transfer system. Me...
How can I implode an array while skipping empty array items?
...
You can use array_filter():
If no callback is supplied, all entries of input equal to FALSE (see converting to boolean) will be removed.
implode('-', array_filter($array));
Obviously this will not work if you have 0 (or any other value that evaluat...