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Is there a typical state machine implementation pattern?
... to happen before you can continue. This will help minimize the number of times you have to run the state machine before you get a result. This can be important when writing I/O functions, or interrupt handlers.
Also, a few pros and cons of the classic switch statement:
Pros:
it is in the lang...
jQuery’s .bind() vs. .on()
... .bind instead.
However, .bind may be removed from future versions at any time. There is no reason to keep using .bind and every reason to prefer .on instead.
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Python - write() versus writelines() and concatenated strings
...before writelines() starts to write the data. First of all, this may waste time. Why not start writing parts of data while reading other parts? But, most importantly, this approach can be very memory consuming. In an extreme scenario, where the input file is larger than the memory of your machine, t...
Evaluating a mathematical expression in a string
...he above code has only been tested on Python 3.
If desired, you can add a timeout decorator on this function.
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1030 Got error 28 from storage engine
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Nice Answer. It saved my lots of time. +1
– Pratik Soni
Jun 24 '16 at 6:42
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Check whether a string is not null and not empty
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@user1154390: sometimes its worth explicitly using true and false for clarity, but when condition returns true for true and false for false, its unnecessary complexity. Simply say (str != null && str.length() > 0).
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error: passing xxx as 'this' argument of xxx discards qualifiers
...assumption that getId() might attempt to modify the object but at the same time, it also notices that the object is const; so any attempt to modify the const object should be an error. Hence compiler generates an error message.
The solution is simple: make the functions const as:
int getId() cons...
What does HTTP/1.1 302 mean exactly?
... which is no longer relevant nowadays. Quoting Mark Nottingham who, at the time of writing, co-chairs the IETF HTTP and QUIC Working Groups:
Don’t use RFC2616. Delete it from your hard drives, bookmarks, and burn (or responsibly recycle) any copies that are printed out.
The old RFC 2616 has ...
What does middleware and app.use actually mean in Expressjs?
...sn't do anything unless you handle it. Express will handle the stack every time an incoming HTTP request is caught on the server. With middleware you handle the stack manually.
// express, you need to do nothing
// middleware
stack.handle(someData);
A more complete example :
var middleware = req...
Difference between break and continue statement
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Break Statement
Sometimes it’s necessary to exit a loop before the loop has finished fully iterating over all the step values. For example, looping over a list of numbers until you find a number that satisfies a certain condition. Or looping o...