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What is the difference between a HashMap and a TreeMap? [duplicate]
...erence between HashMap and TreeMap is that TreeMap implements NavigableMap<K,V>, which provide the feature of ordered iteration. Besides, both HashMap and TreeMap are members of Java Collection framework. You can investigate the source code of Java to know more about their implementations.
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What is the purpose of global.asax in asp.net
... can add code under any of the events that are listed (and created by default, at least in Visual Studio 2008):
Application_Start
Application_End
Session_Start
Session_End
Application_BeginRequest
Application_AuthenticateRequest
Application_Error
There are other events that you can also hook i...
Ignore outliers in ggplot2 boxplot
...y a small extreme on one side and and big extreme on the other, e.g. ylim <- c(-0.1, 1000) * 1.05 gives [1] 0.105 1050. To get equal limits around the mean you could use ylim + c(-0.05, 0.05) * diff(ylim) / 2. Prettier in my opinion.
– Bram Visser
Mar 24 '1...
How to format a number as percentage in R?
..., so to use it, you need an extra pair of parentheses.
library(scales)
x <- c(-1, 0, 0.1, 0.555555, 1, 100)
label_percent()(x)
## [1] "-100%" "0%" "10%" "56%" "100%" "10 000%"
Customize this by adding arguments inside the first set of parentheses.
label_percent(big.mark = ",...
C# 'is' operator performance
...dant.
If you are going to cast anyway, here is a better approach:
ISpecialType t = obj as ISpecialType;
if (t != null)
{
// use t here
}
share
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How to use querySelectorAll only for elements that have a specific attribute set?
...
Extra Tips:
Multiple "nots", input that is NOT hidden and NOT disabled:
:not([type="hidden"]):not([disabled])
Also did you know you can do this:
node.parentNode.querySelectorAll('div');
This is equivelent to jQuery's:
$(node).parent...
{" was not expected.} Deserializing Twitter XML
...flicts with the MessageContract attribute. Both answers are valid and the alternative was presented in the comments. The point is you are down voting a valid answer not a wrong answer. If you don't agree that it is the best just don't vote.
– Bronumski
Aug 13 '...
How to concatenate two strings in C++?
...o use strlen)
while (*f++) ++l1;
while (*l++) ++l2;
char *result = new char[l1 + l2];
// then concatenate
for (int i = 0; i < l1; i++) result[i] = first[i];
for (int i = l1; i < l1 + l2; i++) result[i] = second[i - l1];
// finally, "cap" result with terminating n...
Find lines from a file which are not present in another file [duplicate]
...mmand you have to use is not diff but comm
comm -23 a.txt b.txt
By default, comm outputs 3 columns: left-only, right-only, both. The -1, -2 and -3 switches suppress these columns.
So, -23 hides the right-only and both columns, showing the lines that appear only in the first (left) file.
If you ...
How to remove all subviews of a view in Swift?
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In Xcode 7.0 beta 6 this generates a warning: "result of call to 'map' is unused". I hope this gets fixed in the final version.
– Ferschae Naej
Sep 1 '15 at 6:21
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