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Is there any overhead to declaring a variable within a loop? (C++)
...this basic thing. Once he laughed at me declaring a variable inside a loop and I was wondering what's wrong until he cited performance as the reason not to do so and I was like "WTF!?".
– Mehrdad Afshari
Jun 11 '09 at 19:35
...
Merge / convert multiple PDF files into one PDF
...er to provide out.pdf, or else it will overwrite the last file in your command, sigh.
– mlissner
Oct 19 '13 at 22:20
10
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How to create a cron job using Bash automatically without the interactive editor?
...n file
crontab mycron
rm mycron
Cron line explaination
* * * * * "command to be executed"
- - - - -
| | | | |
| | | | ----- Day of week (0 - 7) (Sunday=0 or 7)
| | | ------- Month (1 - 12)
| | --------- Day of month (1 - 31)
| ----------- Hour (0 - 23)
------------- Minute (0 - 59)
Source nix...
LINQ where vs takewhile
...
TakeWhile stops when the condition is false, Where continues and find all elements matching the condition
var intList = new int[] { 1, 2, 3, 4, 5, -1, -2 };
Console.WriteLine("Where");
foreach (var i in intList.Where(x => x <= 3))
Console.WriteLine(i);
Console.WriteLine("Take...
What is the difference between javac and the Eclipse compiler?
...mes with its own compiler is also apparent because you can write, compile, and run Java code in Eclipse without even installing the Java SDK.
A few examples where ECJ is preferred over javac is:
Apache Tomcat uses ECJ to compile JSPs,
IntelliJ IDEA has support for ECJ, as of GNU Compiler for Jav...
Setting dynamic scope variables in AngularJs - scope.
...ng I have gotten from a routeParam or a directive attribute or whatever, and I want to create a variable on the scope based on this. So:
...
How to “test” NoneType in python?
...ariable has None in it or not.
Quoting from is docs,
The operators is and is not test for object identity: x is y is true if and only if x and y are the same object. x is not y yields the inverse truth value.
Since there can be only one instance of None, is would be the preferred way to check...
Html.BeginForm and adding properties
...t, new { enctype="multipart/form-data"})
Or you can pass null for action and controller to get the same default target as for BeginForm() without any parameters:
Html.BeginForm(
null, null, FormMethod.Post, new { enctype="multipart/form-data"})
...
What's the difference between the four File Results in ASP.NET MVC
...uld like to return as a file
FilePathResult - when you have a file on disk and would like to return its content (you give a path)
FileStreamResult - you have a stream open, you want to return its content as a file
However, you'll rarely have to use these classes - you can just use one of Controlle...
What is a servicebus and when do I need one?
...
You can think of a service bus as the Ethernet of SOA.
First and foremost, it introduces a language of identifying things, like an IP address in Ethernet. This name isn't something inherently physical.
Next, you have something physical involved on each node, like a queue in the case o...