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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...
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;
...
MSBuild doesn't copy references (DLL files) if using project dependencies in solution
... contain any code that explicitly uses assembly B (e.g. B.SomeFunction()), VS/MSBuild doesn't detect that B is required by X, and thus doesn't copy it over into project Y's bin directory; it only copies the X and A assemblies.
Solution
You have two options to solve this problem, both of which will...
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
4
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How to convert date to timestamp?
...tamp(strDate){
var datum = Date.parse(strDate);
return datum/1000;
}
alert(toTimestamp('02/13/2009 23:31:30'));
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WaitAll vs WhenAll
...rdering a takeaway and then standing by the door waiting for it to arrive, vs ordering a takeaway, doing other stuff and then opening the door when the courier arrives...
– Jon Skeet
Dec 1 '15 at 21:37
...
System.Timers.Timer vs System.Threading.Timer
... just same as asked in this question: Thread-safety of System.Timers.Timer vs System.Threading.Timer, or perhaps everyone just means that:
it's easy to write race conditions when you're using timers. E.g. see this question:
Timer (System.Threading) thread safety
re-entrancy of timer notifications,...
IPN vs PDT in Paypal
...'t guarantee message delivery. Here is link to doc covering that topic PDT vs IPN.
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Getting the first index of an object
...
If you want something concise try:
for (first in obj) break;
alert(first);
wrapped as a function:
function first(obj) {
for (var a in obj) return a;
}
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