我正在尝试联盟两套地图.我有两套,并希望将它们组合成第三套.我在push_back中遇到此代码的错误.有没有办法做到这一点?
map<char, vector<char> > numbers;
map<char, vector<char> >::iterator it;
numbers['E'].push_back('a');//set1
numbers['E'].push_back('b');
numbers['E'].push_back('c');
numbers['G'].push_back('d');//set2
numbers['G'].push_back('e');
void Create::Union(char set1, char set2, char set3)
{
for (it = numbers.begin(); it != numbers.end(); ++it)
{
numbers[set3].push_back(it->second);
}
}
Run Code Online (Sandbox Code Playgroud) 如何在C#中创建多维数据结构?
在我看来,它的工作原理如下:
List<List<int>> results = new List<List<int>>();
for (int i = 0; i < 10; i++)
{
for (int j = 0; j < 10; j++)
{
results[i][j] = 0;
}
}
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这不起作用(抛出一个ArgumentOutOfRangeException).C#中是否存在多维结构,允许我通过索引访问成员?
我在flash中创建了一个导航栏,其中有5个不同的动画片段我用作按钮.每个动画片段(按钮)都有不同的实例名称.有没有办法使用addeventlistener,所以我不必像这样做:
//for button1
button1.buttonMode = true;// Show the hand cursor
button1.addEventListener(MouseEvent.ROLL_OVER, button1_over);
button1.addEventListener(MouseEvent.ROLL_OUT, button1_out);
button1.addEventListener(MouseEvent.CLICK, button1_click);
function button1_over(e:MouseEvent):void
{
e.currentTarget.gotoAndPlay("over");
}
function button1_out(e:MouseEvent):void
{
e.currentTarget.gotoAndPlay("out");
}
function button1_click(e:MouseEvent):void
{
var request:URLRequest = new URLRequest("http://website.com");
navigateToURL(request);
}
//for button2
button2.buttonMode = true;// Show the hand cursor
button2.addEventListener(MouseEvent.ROLL_OVER, button2_over);
button2.addEventListener(MouseEvent.ROLL_OUT, button2_out);
button2.addEventListener(MouseEvent.CLICK, button2_click);
function button2_over(e:MouseEvent):void
{
e.currentTarget.gotoAndPlay("over");
}
function button2_out(e:MouseEvent):void
{
e.currentTarget.gotoAndPlay("out");
}
function button2_click(e:MouseEvent):void
{
var request:URLRequest = new URLRequest("http://website.com");
navigateToURL(request);
}
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...等所有五个按钮?
触摸可以指定self来获取其自己的坐标系中的触摸位置,但我如何从另一个获取它?说另一个UIview的坐标系?
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
[UIView beginAnimations:@"box" context:nil];
[UIView setAnimationDuration:1];
[UIView setAnimationBeginsFromCurrentState:YES];
UITouch *touch = [touches anyObject];
box.center = [touch locationInView:self];
[UIView commitAnimations];
}
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我可以用不同的UIview名称来看待"自我"吗?
这是我到目前为止,但我不认为这是对的.
for (int i = 0 ; i < 5; i++)
{
for (int j = 0; j < 5; j++)
{
matrix[i][j] += matrix[i][j] * matrix[i][j];
}
}
Run Code Online (Sandbox Code Playgroud) 如果我有这个:
List<List<int>> matrix = new List<List<int>>();
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我将如何填充它,使它看起来像这样:
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
我想拆分并删除这样输入文本字段的字符串中的逗号:
1,2,3,4,5,6
然后将它们显示在不同的文本字段中,如下所示:
123456
这是我尝试过的.
String text = jTextField1.getText();
String[] tokens = text.split(",");
jTextField3.setText(tokens.toString());
Run Code Online (Sandbox Code Playgroud) 可能重复:
如何使用perl从字符串中提取电子邮件地址?
说我有这样的字符串:
X大学博士在无处的名字pete@school.edu Blah blah 3 one niner
我怎样才能收到那封电子邮件?
说我有这样的文本文件:
<html><head>Headline<html><head>more words
</script>even more words</script>
<html><head>Headline<html><head>more words
</script>even more words</script>
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我如何将标签放入如下列表中:
<html>
<head>
<html>
<head>
</script>
</script>
<html>
<head>
<html>
<head>
</script>
</script>
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