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What is the difference between active and passive FTP?
...the command channel in active mode and it does the same here.
However, it then requests the server (on the command channel) to start listening on a port (at the servers discretion) rather than trying to establish a connection back to the client.
As part of this, the server also returns to the clie...
Stashing only un-staged changes in Git
... git to only stash the things you are not keeping... I often commit stuff, then do a full git stash, knowing that I can git commit --ammend if there are problems in what I committed.
– rjmunro
Apr 8 '14 at 10:11
...
Java: Instanceof and Generics
...ct(Class<T> type) {
return new MyObject<T>(type);
}
And then in the object's constructor store that type, so variable so that your method could look like this:
if (arg0 != null && !(this.type.isAssignableFrom(arg0.getClass()))
{
return -1;
...
What does new self(); mean in PHP?
... if there is an object stored on this static class variable, the class can then decide to create or not to create a single instance, so if its not set, !isset, meaning no object exists on the static member $_instance, then it generates a new object, stored it in the static member $_instance by the c...
What can I use instead of the arrow operator, `->`?
...mantically nice path, but that also has been getting better not worse. But then again I have C++ Stockholm Syndrome.
– Tim Seguine
Aug 6 '18 at 9:13
...
Is multiplication and division using shift operators in C actually faster?
...When the hardware didn't support fast multiplication (and
most didn't back then), the compiler would convert the multiplication
into the appropriate combinations of shifts and add/sub. And because it
knew the final goal, it could sometimes do so in less instructions than
when you explicitly wrote t...
How to convert decimal to hexadecimal in JavaScript
... (hence the string representation in the question). If you've got a Number then this will work. If you have something too big to be a javascript Number object (a Double) then you'll have to find something else.
– Prestaul
Mar 30 '12 at 5:36
...
Add a column with a default value to an existing table in SQL Server
...
Optional Constraint Name:
If you leave out CONSTRAINT D_SomeTable_SomeCol then SQL Server will autogenerate
a Default-Contraint with a funny Name like: DF__SomeTa__SomeC__4FB7FEF6
Optional With-Values Statement:
The WITH VALUES is only needed when your Column is Nullable
and you want t...
jQuery.ajax handling continue responses: “success:” vs “.done”?
...the function return $.ajax itself and bind your callbacks with done, fail, then, or whatever. Note that always is a callback that will run whether the request succeeds or fails. done will only be triggered on success.
For example:
function xhr_get(url) {
return $.ajax({
url: url,
type: ...
Get IP address of visitors using Flask for Python
...
See the documentation on how to access the Request object and then get from this same Request object, the attribute remote_addr.
Code example
from flask import request
from flask import jsonify
@app.route("/get_my_ip", methods=["GET"])
def get_my_ip():
return jsonify({'ip': reque...