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C# nullable string error
...eclare typeOfContract as string and simply check for null after getting it from the query string. Or use String.IsNullOrEmpty if you want to handle empty string values the same as null.
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Difference of Maven JAXB plugins
...aven-jaxb2-plugin
versus
com.sun.tools.xjc.maven2:maven-jaxb-plugin,
from my point of view it's definitely
the first one
(http://maven-jaxb2-plugin.java.net/).
This plugin has much more features
than
com.sun.tools.xjc.maven2:maven-jaxb-plugin,
the development is active. Finally,...
How do you make a HTTP request with C++?
...bution.
To get the content of an URL you do something like that (extracted from examples) :
// Edit : rewritten for cURLpp 0.7.3
// Note : namespace changed, was cURLpp in 0.7.2 ...
#include <curlpp/cURLpp.hpp>
#include <curlpp/Options.hpp>
// RAII cleanup
curlpp::Cleanup myCleanup;
...
Collections.emptyList() returns a List?
...
Got it. Coming from the ML world, it's weird to me that Java can't infer the correct type: the type of formal parameter and the return type of emptyList are clearly unifiable. But I guess the type inferencer can only take "baby steps."
...
Drop unused factor levels in a subsetted data frame
...- factor(subdf$letters)
> subdf$letters
[1] a b c
Levels: a b c
EDIT
From the factor page example:
factor(ff) # drops the levels that do not occur
For dropping levels from all factor columns in a dataframe, you can use:
subdf <- subset(df, numbers <= 3)
subdf[] <- lapply(subd...
Differences in auto-unboxing between Java 6 vs Java 7
...1) of allowed conversions (this table is not included in the Java 5/6 JLS) from reference types to primitives. This explicitly lists casts from Object to primitives as a narrowing reference conversion with unboxing.
The reason is explained in this email:
Bottom line: If the spec. allows (Objec...
How can you speed up Eclipse?
...ean: same (additionally installed) plugins used, same projects checked out from version control).
Launching it with the latest JDK (Java 14 at the time of writing, which does not prevent you to compile in your Eclipse project with any other JDK you want: 1.4.2, 1.5, 1.6 older...)
-vm jdk1.6.0_10...
How to rebase local branch with remote master
I have a cloned project from a master branch from remote repository remote_repo . I create a new branch and I commit to that branch. Other programmers pushed to remote_repo to the master branch.
...
Is it possible to make a div 50px less than 100% in CSS3? [duplicate]
...ou should usually use. Just
avoid overusing float. This prevents elements from naturally filling their container.
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.NET: Simplest way to send POST with data and read response
To my surprise, I can't do anything nearly as simple as this, from what I can tell, in the .NET BCL:
8 Answers
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