半城柳色半声笛

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半城柳色半声笛 2024-11-09 04:13:47

Object 函数是一个构造函数,所有其他类型(如 Array、String、Number)都继承它。

Object function is a constructor function, all other types(like Array, String, Number) inheritate it.

JavaScript“对象”的作用是什么?功能做什么?

半城柳色半声笛 2024-11-09 03:37:32

这里有一个很好的起始链接:如何使用 HTML Agility pack

另请参阅:用于更改的 HtmlAgilityPack 示例链接不起作用。我该如何实现这一点?

这是:查找 HTML 文档中的所有 A HREF URL(即使是格式错误的 HTML)

要查找特定的 HREF,xpath 语法为“//a[@href='your url']”,意思是:“获取任何 HREF 属性等于 'your url' 的 A 标记。

编辑:

要查找 HREF,如果您只知道文本,例如,如果您有 html 文本 'Cars' 并查找 homepage.html,那么这就是您的方式会做的。

        string s = @"<a href=""homepage.html"">Cars</a>";

        HtmlDocument doc = new HtmlDocument();
        doc.LoadHtml(s);

        HtmlNode node = doc.DocumentNode.SelectSingleNode("//a[text()='Cars']");
        Console.WriteLine("href=" + node.GetAttributeValue("href", null));

Here is a good starting link here on SO: How to use HTML Agility pack

See also this: HtmlAgilityPack example for changing links doesn't work. How do I accomplish this?

And this: Finding all the A HREF Urls in an HTML document (even in malformed HTML)

To find a specific HREF, the xpath syntax would be "//a[@href='your url']", meaning: "get any A tag that has an HREF attribute equal to 'your url'.

EDIT:

To find an HREF if you only know the text, for example if you have the html text '<a href="homepage.html">Cars</a>' and look for homepage.html, then this is how you would do it.

        string s = @"<a href=""homepage.html"">Cars</a>";

        HtmlDocument doc = new HtmlDocument();
        doc.LoadHtml(s);

        HtmlNode node = doc.DocumentNode.SelectSingleNode("//a[text()='Cars']");
        Console.WriteLine("href=" + node.GetAttributeValue("href", null));

使用 VB.net HTML AgilityPack 解析链接和表格

半城柳色半声笛 2024-11-09 03:03:51

使用带有标识列的临时表来模拟 ROW_NUMBER 可能是性能方面的最佳选择:

CREATE TABLE #tmpRowNum (
    ROWID INT IDENTITY(1,1),
    ID INT
)

INSERT INTO #tmpRowNum
    (ID)
    SELECT ID
        FROM [ARAS].[ARAS].[Movement]
        ORDER BY InstallmentNumber, ID

Using a temp table with an identity column to simulate the ROW_NUMBER may be your best bet performance wise:

CREATE TABLE #tmpRowNum (
    ROWID INT IDENTITY(1,1),
    ID INT
)

INSERT INTO #tmpRowNum
    (ID)
    SELECT ID
        FROM [ARAS].[ARAS].[Movement]
        ORDER BY InstallmentNumber, ID

消除 SQL 2000 的 ROW_NUMBER()

半城柳色半声笛 2024-11-09 02:23:06

问题是 .live() 适用于选择器而不是指定的元素。

引用自文档

为现在和将来匹配当前选择器的所有元素附加一个处理程序。

DOM遍历方法不是
支持查找要发送的元素
到.live()。相反,.live() 方法
应该总是在之后直接调用
选择器,如上例所示。

因此,您应该更改将实时事件绑定到

$(this.selector + " + input[type='text']").live("keyup", function(){

this.selector 的方式,将返回使用的原始选择器,并且 + input[type='text']下一个相邻选择器

实时地址 http://jsfiddle.net/gaby/u9uhV/

The problem is that .live() works with selectors and not specified elements.

Quoting from the docs

Attach a handler to the event for all elements which match the current selector, now and in the future.

and

DOM traversal methods are not
supported for finding elements to send
to .live(). Rather, the .live() method
should always be called directly after
a selector, as in the example above.

So you should change the way you bind the live event to

$(this.selector + " + input[type='text']").live("keyup", function(){

this.selector will return the original selector used and the + input[type='text'] is the next adjacent selector

live at http://jsfiddle.net/gaby/u9uhV/

jQuery live 问题:在选择列表过滤功能中,live 不适用于 keyup 事件

半城柳色半声笛 2024-11-08 21:42:06

我认为这在当今有效:

.center
{
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
}

I think this works nowadays:

.center
{
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
}

如何让div自动设置自己的宽度?

半城柳色半声笛 2024-11-08 21:20:24

虚拟内存碎片可能是一个原因。

另一个可能的原因是内存管理器(内存池)通常是如何工作的。内存管理器尝试保留比前一个内存块多 2 倍的内存块。当内存分配已经相当多时,这个数量将非常大,并且内存分配将会失败,尽管实际上仍然有可用内存。

The fragmentation of the virtual memory could be a reason.

One more possible reason is how memory managers (memory pools) are usually work. Memory manager attempts to reserve a block of memory 2 times more than the previous one. When memory is allocated already quite a lot, this amount will be very large and a memory allocation will fail despite the fact that in reality there is still available memory.

C++一旦内存使用量达到 1.5 GB,应用程序就会崩溃

半城柳色半声笛 2024-11-08 16:41:20

根据 参考truststoreFile 将覆盖您在 catalina.sh、startup.sh、命令行或您启动它的方式中的内容。默认值是 javax.net.ssl.trustStore 系统属性的值,这些方法在启动 Tomcat 之前设置该值。

在代码中设置属性不会产生任何效果,因为在代码运行时连接器已经初始化。

According to the reference, truststoreFile will override what you have in catalina.sh, startup.sh, the command line, or however you start it. The default is the value of the javax.net.ssl.trustStore system property, which those methods set before starting Tomcat.

Setting the property in code won't have any effect because by the time the code runs the Connector will have already been initialized.

信任库初始化 - Tomcat

半城柳色半声笛 2024-11-08 15:51:51

如果 prettify 是新行上的名称值对,那么在 stringify 中指定空格数对我来说不起作用,唯一对我有用的是

await fs.promises.writeFile('testdataattr.json',JSON.stringify(datatofile, null,'\r\n'),'utf8') ;

if prettify is name value pairs on new lines then specifying number of spaces in stringify didn't work for me the only thing that worked for me was

await fs.promises.writeFile('testdataattr.json',JSON.stringify(datatofile, null,'\r\n'),'utf8') ;

如何使用 node.js 漂亮地打印 JSON?

半城柳色半声笛 2024-11-08 11:24:40

remove 需要 algorithm 标头并且来自 std 命名空间

我确实发现 C++ 参考 对于快速获取使用示例和标题非常有帮助是必需的。它可能没有某些内容的完整信息,但如果我不确定如何使用 C 库、流库、字符串库、STL 容器或 STL 算法的某些部分,它可以作为一个良好的开始。

remove requires the algorithm header and is from std namespace

I do find the C++ Reference very helpful for quickly getting usage examples and what headers are required. It may not have complete information for some things but it helps as a good start if I am not sure about how to use some parts of C Library, stream Library, strings library, STL Containers or STL Algorithms

从 c++ 中的字符串中删除双引号

半城柳色半声笛 2024-11-08 07:35:32

目前,在 swift 5 中,检查播放器是否正在播放或暂停的最简单方法是检查 .timeControlStatus 变量。

player.timeControlStatus == .paused
player.timeControlStatus == .playing

Currently with swift 5 the easiest way to check if the player is playing or paused is to check the .timeControlStatus variable.

player.timeControlStatus == .paused
player.timeControlStatus == .playing

检查AVPlayer的播放状态

半城柳色半声笛 2024-11-08 07:25:03

对于斯威夫特 3

let prettyImage = UIImage(named: "prettyImage",
            in: Bundle(for: self),
            compatibleWith: nil)

For Swift 3

let prettyImage = UIImage(named: "prettyImage",
            in: Bundle(for: self),
            compatibleWith: nil)

使用 iOS 从捆绑包中加载图像

半城柳色半声笛 2024-11-08 03:53:16
UIBarButtonItem *addButton = 
  [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd 
  target:self
  action:@selector(myCallback:)];
self.navigationItem.rightBarButtonItem = addButton;
[addButton release];
UIBarButtonItem *addButton = 
  [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd 
  target:self
  action:@selector(myCallback:)];
self.navigationItem.rightBarButtonItem = addButton;
[addButton release];

如何添加带有“'+'”的方形按钮到 uinavigationbar 上吗?

半城柳色半声笛 2024-11-07 21:29:44

这可以使用静态分析来完成。如果您使用 Eclipse,请查看 FindBugs 插件,它可以检测缺少 static 内部类和一堆其他有用的问题。

This can be done using static analysis. If you are using Eclipse check out the FindBugs plugin, it can detect the lack of static inner classes and a bunch of other useful problems.

Java:为什么内部类必须是静态的?

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