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Why would iterating over a List be faster than indexing through it?
...inter to the next element:
head -> item1 -> item2 -> item3 -> etc.
To access item3, you can see clearly that you need to walk from the head through every node until you reach item3, since you cannot jump directly.
Thus, if I wanted to print the value of each element, if I write this:...
What's the difference between unit, functional, acceptance, and integration tests? [closed]
...s
Access the network
Hit a database
Use the file system
Spin up a thread
etc.
Any kind of dependency that is slow / hard to understand / initialise / manipulate should be stubbed/mocked/whatevered using the appropriate techniques so you can focus on what the unit of code is doing, not what its d...
REST API 404: Bad URI, or Missing Resource?
...ifference, but that doesn't imply that an empty string is an error. To stretch the analogy: You could have a method String getName() that has an implementation like this: return this.name == null ? "" : this.name. That's not incorrect unless you want the client to know that this.name is null.
...
Change column type from string to float in Pandas
... data type you can give your datatype .what do you want like str,float,int etc.
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Set up DNS based URL forwarding in Amazon Route53 [closed]
...ct to the aws signin page.
Go to your nginx conf folder (in my case it's /etc/nginx/sites-available in which I create a symlink to /etc/nginx/sites-enabled for the enabled conf files).
Then add a redirect path
server {
listen 80;
server_name aws.example.com;
return 301 https://myaccount.si...
Why are joins bad when considering scalability?
... learn of things like the various normal forms (1st, 2nd, 3rd, Boyce-Codd, etc.), and we learn about different types of keys (primary, foreign, alternate, unique, etc.) and how these things fit together to design a database. And we learn the rudiments of SQL as well as manipulating both structure a...
What Makes a Good Unit Test? [closed]
...ses with intention-revealing names, No duplication, tests with good names, etc.
Good tests also run Fast. any test that takes over half a second to run.. needs to be worked upon. The longer the test suite takes for a run.. the less frequently it will be run. The more changes the dev will try to sne...
Do you have to put Task.Run in a method to make it async?
...<T> or one of its shortcuts (TaskFactory.FromAsync, Task.FromResult, etc). I don't recommend wrapping an entire method in Task.Run; synchronous methods should have synchronous signatures, and it should be left up to the consumer whether it should be wrapped in a Task.Run:
private int DoWork()...
Can we define implicit conversions of enums in c#?
...ding methods to return the value of DescriptionAttributes, declared names, etc, etc.
I wrote a base class (RichEnum<>) to handle most fo the grunt work, which eases the above declaration of enums down to:
public sealed class AccountStatus : RichEnum<byte, AccountStatus>
{
public st...
In Windows Azure: What are web role, worker role and VM role?
...a tcp, http, https, or udp endpoint (web applications, SOAP/REST services, etc.). You need to think about the stateless way of doing things though - if you have more than one VM instance running, user traffic is distributed across those instances. The platform training kit will show you how to use s...