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如何使用 jquery 将单击处理程序分配给菜单的每个子项?
我想toString在Item类中添加一个返回项目标题的方法.
我需要确保类中的toString方法DVD调用该toString方法,Item以便它可以返回包含title和director的字符串.
Item是超类,DVD是子类.
public class Item
{
private String title;
private int playingTime;
private boolean gotIt;
private String comment;
public Item(String theTitle, int time)
{
title = theTitle;
playingTime = time;
gotIt = false;
comment = "<no comment>";
}
// Getters and setters omitted
public void print()
{
System.out.print(title + " (" + playingTime + " mins)");
if(gotIt) {
System.out.println("*");
} else {
System.out.println();
}
System.out.println(" " …Run Code Online (Sandbox Code Playgroud) 我正在尝试设计我的(Java)类,我不确定这是什么 - 必要的是它是这样的:
MediaPlayer // contains play(String filePath) method
OtherPlayer // extends MediaPlayer and inherits play(String filePath)
MyObject // extends OtherPlayer
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问题是 - 我想MyObject在不传递字符串的情况下调用play.MyObject包含一个私有成员,我想简单地调用,
myobject.play();
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我可以使用MyObject重载,play()但不知何故play(String filePath)使用其私有字符串调用?
编辑:
我想避免这样做:
myobject.play(myobject.getFilePath());
Run Code Online (Sandbox Code Playgroud) 我有定义def test(¶m)和功能def test(:¶m).两者有什么区别?
我正在尝试模拟常见测试框架(例如JUnit或TestNG)的预期异常行为.
到目前为止,这是我能想到的(工作):
trait ExpectAsserts
{
self : {
def fail (message : String)
def success (message : String)
} =>
def expect[T](exceptionClass : Class[T])(test : => Unit)
{
try
{
test
fail("exception not thrown")
}
catch
{
case expected : T => success("got exception " + expected)
case other : Exception => fail("expected "+ exceptionClass + " but " + other + " thrown instead.")
}
}
}
object Main extends ExpectAsserts
{
def main (args : Array[String])
{
expect(classOf[ArithmeticException]) …Run Code Online (Sandbox Code Playgroud) 我在golang中运行一些测试,我想避免运行慢速,例如这个使用bcrypt所以它很慢:
// +build slow
package services
import (
"testing"
"testing/quick"
)
// using bcrypt takes too much time, reduce the number of iterations.
var config = &quick.Config{MaxCount: 20}
func TestSignaturesAreSame(t *testing.T) {
same := func(simple string) bool {
result, err := Encrypt(simple)
success := err == nil && ComparePassWithHash(simple, result)
return success
}
if err := quick.Check(same, config); err != nil {
t.Error(err)
}
}
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为了避免在每次迭代中运行它,我都设置了// +build slow标志.这应该只在执行时运行,go test -tags slow但不幸的是它每次都在运行(-v标志显示它正在运行).
知道什么是错的吗?
java ×2
go ×1
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scala ×1
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