大约有 44,000 项符合查询结果（耗时：0.0634秒） [XML]
Adding a regression line on a ggplot
...n <- function (fit) {
`require(ggplot2)
ggplot(fit$model, aes_string(x = names(fit$model)[2], y = names(fit$model)[1])) +
geom_point() +
stat_smooth(method = "lm", col = "red") +
labs(title = paste("Adj R2 = ",signif(summary(fit)$adj.r.squared, 5),
...
What's the difference between == and .equals in Scala?
...in Java" - depends on what exactly this is:
public static void main(final String... args) {
final double unboxedNaN = Double.NaN;
final Double boxedNaN = Double.valueOf(Double.NaN);
System.out.println(unboxedNaN == unboxedNaN);
System.out.println(boxedNaN == boxedNaN);
System.o...
Function pointers, Closures, and Lambda
...s C# 3 method:
public Person FindPerson(IEnumerable<Person> people, string name)
{
return people.Where(person => person.Name == name);
}
The lambda expression not only encapsulates the logic ("compare the name") but also the environment, including the parameter (i.e. local variable) ...
What's the difference between Application.ThreadException and AppDomain.CurrentDomain.UnhandledExcep
...bit of code from msdn is pretty self-explanatory:
public static void Main(string[] args)
{
// Add the event handler for handling UI thread exceptions to the event.
Application.ThreadException += new
ThreadExceptionEventHandler(ErrorHandlerForm.Form1_UIThreadException);
// Set ...
Good MapReduce examples [closed]
... key:value pairs. For instance, if we define
a map function that takes a string and outputs the length of the word
as the key and the word itself as the value then map(steve) would
return 5:steve and map(savannah) would return 8:savannah. You may have
noticed that the map function is statele...
XML Validation with XSD in Visual Studio IDE
...w">
<xs:sequence>
<xs:element name="Name" type="xs:string" minOccurs="1" maxOccurs="1" />
<xs:element name="Value" type="xs:float" minOccurs="1" maxOccurs="1" />
</xs:sequence>
</xs:complexType>
<!-- Use the type (note the "this:" prefix) -...
Catch an exception thrown by an async void method
...{
if( i % 2 == 0 )
throw new ArgumentException(String.Format("Even argument {0}", i));
return i++;
}
});
t.Start();
return t;
}
When you observe the traces
22:25:12.649 02172/02820 { AsyncTest.Program.Run
22:25:12.656 02172/...
How to refer environment variable in POM.xml?
...bles in the shared-pom. The goal was to have environment variables replace strings in my project files using the com.google.code.maven-replacer-plugin.
Using ${env.foo} or ${env.FOO} didn't work for me. Maven just wasn't finding the variable. What worked was passing the variable in as a command-lin...
Spring @PostConstruct vs. init-method attribute
...ts InitializingBean {
@Value("${mycomponent.value:Magic}")
public String value;
public MyComponent() {
log.info("MyComponent in constructor: [{}]", value); // (0) displays: Null
}
@PostConstruct
public void postConstruct() {
log.info("MyComponent in postCon...
Difference between RegisterStartupScript and RegisterClientScriptBlock?
...cted void btnPostBack2_Click(object sender, EventArgs e)
{
System.Text.StringBuilder sb = new System.Text.StringBuilder();
sb.Append("<script language='javascript'>function ChangeColor() {");
sb.Append("var lbl = document.getElementById('lblDisplayDate');");
sb.Append("lbl.style.c...