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Opposite of %in%: exclude rows with values specified in a vector
...ages/purrr/versions/0.2.5/topics/… stat.ethz.ch/R-manual/R-devel/library/base/html/match.fun.html
– flying sheep
Mar 15 '19 at 16:44
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When should I use perror(“…”) and fprintf(stderr, “…”)?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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Does this app use the Advertising Identifier (IDFA)? - AdMob 6.8.0
...ly ads (Google AdMob), I checked the first (Serve ads...) and last box (I, ___, confirm...). App was approved and released, no issues.
Source: https://groups.google.com/forum/#!topic/google-admob-ads-sdk/BsGRSZ-gLmk
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Can a C# lambda expression have more than one statement?
...ven without curly brackets:
Action<int, int> action = (x, y) => (_, _) = (X += x, Y += y);
and
Action<int, int> action = (x, y) => _ = (X += x, Y += y);
would be the same as:
Action<int, int> action = (x, y) => { X += x; Y += y; };
This also might be helpful if yo...
Getting the object's property name
...DN
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/keys
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Best explanation for languages without null
... middleLen = p.middleName match {
case Some(x) => x.length
case _ => 0
}
p.firstName.length + middleLen + p.lastName.length
}
there's not much difference! But it's also a terrible way to use Options... This approach is much cleaner:
def fullNameLength(p:Person) = {
val middl...
How to handle anchor hash linking in AngularJS
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I use $location.hash(my_id); $anchorScroll; $location.hash(null). It prevents the reload and I don't have to manage the old variable.
– MFB
Jun 25 '15 at 5:11
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I can’t find the Android keytool
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Got it: C:\Program Files\Java\jdk1.6.0_14\bin Thanks
– Tim
Jun 8 '10 at 15:05
5
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When do you use the “this” keyword? [closed]
... is no reason to use it otherwise because being able to resolve a variable based on the scope chain should be clear enough that qualifying variables with it should be unnecessary.
EDIT: The C# documentation on "this" indicates one more use, besides the two I mentioned, for the "this" keyword - for ...
C# Interfaces. Implicit implementation versus Explicit implementation
...entation" (Design Principles from Design Patterns).
For example, in an MVP-based web application:
public interface INavigator {
void Redirect(string url);
}
public sealed class StandardNavigator : INavigator {
void INavigator.Redirect(string url) {
Response.Redirect(url);
}
}
N...