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.NET - Dictionary locking vs. ConcurrentDictionary
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A thread-safe collection vs. a non-threadsafe-collection can be looked upon in a different way.
Consider a store with no clerk, except at checkout. You have a ton of problems if people don't act responsibly. For instance, let's say a customer takes ...
When to favor ng-if vs. ng-show/ng-hide?
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The answer is not simple:
It depends on the target machines (mobile vs desktop), it depends on the nature of your data, the browser, the OS, the hardware it runs on... you will need to benchmark if you really want to know.
It is mostly a memory vs computation problem ... as with most perform...
Implements vs extends: When to use? What's the difference?
...e itself.
Refer to this question for when to use each of them:
Interface vs Abstract Class (general OO)
Example to understand things.
public class ExtendsAndImplementsDemo{
public static void main(String args[]){
Dog dog = new Dog("Tiger",16);
Cat cat = new Cat("July",20);
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Java8 Lambdas vs Anonymous classes
...ly an implementation concern; it doesn't affect how one programs with AICs vs lambdas, which is what this question is mostly about. Note that a lambda expression does generate a class with a name like LambdaClass$$Lambda$1/1078694789. However, this class is generated on-the-fly by the lambda metafac...
Differences between socket.io and websockets
...between WebSocket and Socket.IO:
https://www.npmjs.com/package/websocket-vs-socket.io
https://github.com/rsp/node-websocket-vs-socket.io
It is a simple example of server-side and client-side code - the client connects to the server using either WebSocket or Socket.IO and the server sends three m...
Find() vs. Where().FirstOrDefault()
...formances on using the .Find() in specific scenarios Performance of Find() vs. FirstOrDefault()
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Unique Constraint in Entity Framework Code First
...x
Basically you need to insert a call like this in one of your migration scripts:
CreateIndex("TableName", new string[2] { "Column1", "Column2" }, true, "IX_UniqueColumn1AndColumn2");
Something like that:
namespace Sample.Migrations
{
using System;
using System.Data.Entity.Migrations;
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JavaScript property access: dot notation vs. brackets?
...tion is faster (for me at least) test your browser jsperf.com/dot-notation-vs-bracket-notation/2
– Dave Chen
May 23 '13 at 16:55
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ping response “Request timed out.” vs “Destination Host unreachable”
When I ping an IP address, what is the difference between Request timed out and Destination host unreachable returned from the command?
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IPN vs PDT in Paypal
...'t guarantee message delivery. Here is link to doc covering that topic PDT vs IPN.
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