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How do I parallelize a simple Python loop?
...like concurrent.futures for this, available in Python3 since version 3.2 - and via backport to 2.6 and 2.7 on PyPi.
You can use threads or processes and use the exact same interface.
Multiprocessing
Put this in a file - futuretest.py:
import concurrent.futures
import time, random #...
Why does flowing off the end of a non-void function without returning a value not produce a compiler
...
C99 and C++ standards don't require functions to return a value. The missing return statement in a value-returning function will be defined (to return 0) only in the main function.
The rationale includes that checking if every c...
Site stopped working in asp.net System.Web.WebPages.Razor.Configuration.HostSection cannot be cast t
...g contains the proper version for the assembly "System.Web.WebPages.Razor" and "System.Web.Mvc". Check for their actual existence as well as my "System.Web.WebPages.Razor" assembly tag was missing causing the error. I had my assembly versions set to 3.0 and 5.0 respectively in the time of this writ...
Why do we check up to the square root of a prime number to determine if it is prime?
...
If a number n is not a prime, it can be factored into two factors a and b:
n = a * b
Now a and b can't be both greater than the square root of n, since then the product a * b would be greater than sqrt(n) * sqrt(n) = n. So in any factorization of n, at least one of the factors must be smal...
“From View Controller” disappears using UIViewControllerContextTransitioning
I got one problem and i have described it below.
17 Answers
17
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Using “Object.create” instead of “new”
...xist, if you call again this method on an existing object instance, the id and name properties will change.
Object.create lets you initialize object properties using its second argument, e.g.:
var userB = {
sayHello: function() {
console.log('Hello '+ this.name);
}
};
var bob = Object.cre...
Where can I get a list of Ansible pre-defined variables?
...at Ansible provide some pre-defined variables that we can use in playbooks and template files. For example, the host ip address is ansible_eth0.ipv4.address. Googleing and searching the docs I cound't find a list of all available variables. Would someone list them for me?
...
What is the difference between async.waterfall and async.series
...s://github.com/caolan/async provides 2 similar methods, async.waterfall and async.series .
4 Answers
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JavaScript for…in vs for
Do you think there is a big difference in for...in and for loops? What kind of "for" do you prefer to use and why?
23 Answe...
What is the claims in ASP .NET Identity
...re?
There are two common authorization approaches that are based on Role and Claim.
Role-Based Security
A user gets assigned to one or more roles through which the user gets access rights.
Also, by assigning a user to a role, the user immediately gets all the access rights defined for that role....