灯角

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灯角 2024-12-21 17:04:03

memset 相当于:

void *memset(void *s, int c, size_t n) {
    char *ss = (char *)s;
    while (n--)
        *ss++ = c;
    return s;
}

所以,是的,它可以(并且正在)在指针中使用。它将 ss 之后的 (n-1) 字节设置为 c

memset is the equivalent of:

void *memset(void *s, int c, size_t n) {
    char *ss = (char *)s;
    while (n--)
        *ss++ = c;
    return s;
}

So, yes, it can be (and is) used in pointers. It sets s, and (n-1) bytes following s, to c.

使用memset和malloc会冲突吗?

灯角 2024-12-21 16:00:24

针对控制台中显示的警告,使用 jQuery 打开了一张票证。缺点是 jQuery 团队不相信是他们造成了这个问题,而是 firebug 控制台本身。

如果您的弹出窗口被阻止,可能是由于您启动它的方式,或者浏览器阻止它打开。

更新:在不同的地方有与此问题相关的各种问题和错误报告;正在进行的评论和讨论可能有助于阐明OP的问题:

  1. https:// bugzilla.mozilla.org/show_bug.cgi?id=661327
  2. https://bugzilla.mozilla.org/show_bug.cgi?id=690120
  3. < a href="https://stackoverflow.com/q/7789847/74757">getAttributeNode() 和 getAttributeNodeNS() 警告
  4. Firefox 警告消息

A ticket was opened with jQuery about the warning that is displayed in the console. The short of it is that the jQuery team doesn't believe it's them causing the issue, but the firebug console itself.

If your popup is blocked it's probably due to the way you're launching it, or the browser is blocking it from opening.

UPDATE: There are various questions and bug reports associated with this issue at various places; the comments and discussions taking place may help shed some light on the OP's question:

  1. https://bugzilla.mozilla.org/show_bug.cgi?id=661327
  2. https://bugzilla.mozilla.org/show_bug.cgi?id=690120
  3. getAttributeNode() and getAttributeNodeNS() warnings
  4. Firefox warning message

不推荐使用 getAttributeNodeNS()。使用 getAttributeNS() 代替

灯角 2024-12-21 11:42:49

请参阅如何使用操作,其中显示了 Action“可用于分离功能和来自组件的状态。” Charles Bell 的 HTMLDocumentEditor 是该示例展示了如何重用现有操作,以及如何基于 AbstractAction 创建您自己的操作。

See How to Use Actions, which shows how Action "can be used to separate functionality and state from a component." Charles Bell's HTMLDocumentEditor is an example that shows how to reuse existing actions, as well as creating your own based on AbstractAction.

单一职责原则和事件监听器

灯角 2024-12-21 11:08:14

AFAIK 你不能用 LAZY 覆盖 EAGER 加载,但只能反过来。

因此,您需要将关联定义为 LAZY 并在使用联接的查询中覆盖该关联。可能还有其他方法可以做到这一点,但恐怕这就是我现在所知道的。

AFAIK you can't override EAGER loading with LAZY but only the other way round.

Thus, you'd need to define the association the be LAZY and override that in the queries using joins. There might be other ways to do that but I'm afraid that's all I know right now.

覆盖休眠映射文件中相关实体的延迟加载设置

灯角 2024-12-21 10:09:51

实体框架中没有对 SQL 用户定义函数的内置支持,最好的方法是创建一个存储过程来包装函数调用并返回其输出,然后将该过程添加到 EF 模型中。

There is no built in support for SQL User Defined Functions in Entity Framework, your best approach would be to create a stored procedure which wraps the function call and returns its output, then add that procedure to your EF model.

如何将SQL用户自定义函数添加到实体框架中?

灯角 2024-12-21 06:44:50

我将从以 0,0 为中心的坐标系开始,生成有效坐标后将它们映射到您的正方形/矩形上。

这是一个简单的例子:

function getValidCoordinates() {
    var x, y, isValid = false;

    while (!isValid) {
        x = Math.random() * 400 - 200;
        y = Math.random() * 400 - 200;

        if (Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) > 50)
            isValid = true;
        //else alert('too close ' + x + ',' + y);
    }

    return {x: x + 200, y: y + 200};
}

for (var i=0; i < 10; i++) {
    var co = getValidCoordinates();
    alert('x=' + co.x + ', y=' + co.y);
}

I would start with a coordinate system centered at 0,0 and after you have generated valid coordinates map them onto your square/rectangle.

Here's a simple example:

function getValidCoordinates() {
    var x, y, isValid = false;

    while (!isValid) {
        x = Math.random() * 400 - 200;
        y = Math.random() * 400 - 200;

        if (Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) > 50)
            isValid = true;
        //else alert('too close ' + x + ',' + y);
    }

    return {x: x + 200, y: y + 200};
}

for (var i=0; i < 10; i++) {
    var co = getValidCoordinates();
    alert('x=' + co.x + ', y=' + co.y);
}

随机放置矩形,但不在中心 x 半径范围内

灯角 2024-12-21 04:34:23

我已经从 AndEngine 代码中弄清楚了。

不要忘记使用 onAreaTouched() 移动精灵时要

 mScene.setTouchAreaBindingEnabled(true)

在 LoadScene() 方法末尾调用。

Ive figured it out from the AndEngine code.

Dont forget when using onAreaTouched() to move sprites to call

 mScene.setTouchAreaBindingEnabled(true)

At the end of your LoadScene() method.

AndEngine AreaTouched 移动精灵的方法被延迟

灯角 2024-12-20 23:31:19

这是我不接受的公认做法!

我指的是供个人或第三方使用的软件包。
总的来说,我希望我的成品与理想的 (WRI) 质量、外观和感觉尽可能没有区别。
这包括我的命令的长描述性名称,以及 WRI 使用的所有大写约定。

当然,目前我的软件包远未达到 WRI 的质量,但至少我正在尝试尽可能地将它们与标准 MMA 功能集成。这包括使用大写的命令。

在开发过程中,语法突出显示会提醒我可能与标准 MMA 函数发生冲突,以便我可以采取适当的操作。
当然,我的命令和包可能会与 MMA 的未来版本发生冲突,但没有什么是永恒的,如果未来的 MMA 命令在名称和功能上与我的命令和功能类似,我将简单地切换到标准功能,而对命名进行最小或不进行更改。

除此之外,我发现使用大写字母来区分包命令和更适度的临时变量在视觉上更有吸引力。
如果您想查看一些视觉上不透明/没有吸引力的代码,只需查看任何普通的 Maple 代码即可。

关于模式变量,我尝试给出有意义的、大多是短的、不带大写的模式名称,以便用户可以通过查看 Ctrl/Cmd-K 模板来猜测我的包命令中需要什么样的输入。

This is an accepted practice that I do not accept!

I am referring to packages, for personal or 3rd party use.
In general I want my finished work to be as indistinguishable as possible from the ideal (WRI) quality,look and feel.
This includes long descriptive names for my commands, with all the capitalization conventions used by WRI.

Of course my packages are - at the moment - nowhere near WRI quality, but at least I am trying to integrate them as best as I can with standard MMA functionality. And this includes having capitalized commands.

During development, syntax highlighting alerts me of possible conflicts with standard MMA functions, so I can take appropriate actions.
Of course my commands and packages may conflict with future releases of MMA, but nothing lasts forever and if a future MMA command is similar in name and functionality to one of mine, I will simply switch to the standard function with minimal or no change in naming.

Besides this, I find visually much more appealing to use capital letters to distinguish package commands from more modest temporary variables.
If you want to see some visually opaque/unappealing code, just look at any average Maple code.

Regarding pattern variables, I try to give meaningful, mostly short, pattern names with no capitals, so the user can guess by looking at the Ctrl/Cmd-K template what kind of input is expected in my package commands.

命名模式的大写字母

灯角 2024-12-20 21:35:44

您将需要类似以下内容:

Private WithEvents myOlItems  As Outlook.Items

Private Sub Application_Startup()
    Dim olApp As Outlook.Application
    Dim objNS As Outlook.NameSpace
      Set olApp = Outlook.Application
      Set objNS = olApp.GetNamespace("MAPI")
      Set myOlItems = objNS.GetDefaultFolder(olFolderInbox).Items
End Sub

Private Sub myOlItems_ItemAdd(ByVal item As Object)

On Error GoTo ErrorHandler

  Dim Msg As Outlook.MailItem

  If TypeName(item) = "MailItem" Then
    Set Msg = item

    MsgBox Msg.Subject
    MsgBox Msg.Body

  End If

ProgramExit:
  Exit Sub
ErrorHandler:
  MsgBox Err.Number & " - " & Err.Description
  Resume ProgramExit
End Sub

将代码粘贴到 ThisOutlookSession 中并重新启动 Outlook。当邮件进入默认的本地收件箱时,您将看到带有主题和正文的弹出窗口。

You'll need something like this:

Private WithEvents myOlItems  As Outlook.Items

Private Sub Application_Startup()
    Dim olApp As Outlook.Application
    Dim objNS As Outlook.NameSpace
      Set olApp = Outlook.Application
      Set objNS = olApp.GetNamespace("MAPI")
      Set myOlItems = objNS.GetDefaultFolder(olFolderInbox).Items
End Sub

Private Sub myOlItems_ItemAdd(ByVal item As Object)

On Error GoTo ErrorHandler

  Dim Msg As Outlook.MailItem

  If TypeName(item) = "MailItem" Then
    Set Msg = item

    MsgBox Msg.Subject
    MsgBox Msg.Body

  End If

ProgramExit:
  Exit Sub
ErrorHandler:
  MsgBox Err.Number & " - " & Err.Description
  Resume ProgramExit
End Sub

Paste the code into ThisOutlookSession and restart Outlook. When a message enters your default local Inbox you'll see the popup with subject and body.

使用 VBA 阅读新的 Outlook 电子邮件?

灯角 2024-12-20 21:16:24

如果我们可以看到您的 html,那就更容易了。

$('form').submit(function() {
    var sColor = '#' + $('input[type="text"]').val();
    $('input:checked').closest('tr').css('background-color', sColor);
    return false;
});

It would be easier if we could see your html.

$('form').submit(function() {
    var sColor = '#' + $('input[type="text"]').val();
    $('input:checked').closest('tr').css('background-color', sColor);
    return false;
});

使用 jQuery 更改属性?

灯角 2024-12-20 20:42:30
<script>
jQuery(document).ready(function() {
    jQuery( "#datepicker" ).datepicker();
});
</script>
<script>
jQuery(document).ready(function() {
    jQuery( "#datepicker" ).datepicker();
});
</script>

jQuery DatePicker 未加载

灯角 2024-12-20 19:34:01
SELECT [Column1], [Column2], [Column3] FROM [Table]
WHERE [Column1] LIKE '%q%' OR [Column2] LIKE '%q%' OR [Column3] LIKE '%q%'
ORDER BY 
    (CASE WHEN [Column1] LIKE '%q%' THEN 1 ELSE 0 END) +
    (CASE WHEN [Column2] LIKE '%q%' THEN 1 ELSE 0 END) +
    (CASE WHEN [Column3] LIKE '%q%' THEN 1 ELSE 0 END)
    DESC
SELECT [Column1], [Column2], [Column3] FROM [Table]
WHERE [Column1] LIKE '%q%' OR [Column2] LIKE '%q%' OR [Column3] LIKE '%q%'
ORDER BY 
    (CASE WHEN [Column1] LIKE '%q%' THEN 1 ELSE 0 END) +
    (CASE WHEN [Column2] LIKE '%q%' THEN 1 ELSE 0 END) +
    (CASE WHEN [Column3] LIKE '%q%' THEN 1 ELSE 0 END)
    DESC

统计有多少列符合条件

灯角 2024-12-20 18:17:35

您可以使用 focus 事件在 javascript 中执行此操作。

$('#your-anchor-tag-selector').focus(function() {
  $(this).css({'background-image':'images/your-image.jpg)'});
});

You can do this in javascript using the focus event.

$('#your-anchor-tag-selector').focus(function() {
  $(this).css({'background-image':'images/your-image.jpg)'});
});

当访问者选项卡选择元素时如何更改样式?

灯角 2024-12-20 15:31:39

如果您想使用 v3 谷歌地图 API,可以使用以下函数:
注意:您必须将 &libraries=geometry 添加到脚本源中

<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false&libraries=geometry"></script>

<script>
var p1 = new google.maps.LatLng(45.463688, 9.18814);
var p2 = new google.maps.LatLng(46.0438317, 9.75936230000002);

alert(calcDistance(p1, p2));

//calculates distance between two points in km's
function calcDistance(p1, p2) {
  return (google.maps.geometry.spherical.computeDistanceBetween(p1, p2) / 1000).toFixed(2);
}

</script>

If you're looking to use the v3 google maps API, here is a function to use:
Note: you must add &libraries=geometry to your script source

<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false&libraries=geometry"></script>

<script>
var p1 = new google.maps.LatLng(45.463688, 9.18814);
var p2 = new google.maps.LatLng(46.0438317, 9.75936230000002);

alert(calcDistance(p1, p2));

//calculates distance between two points in km's
function calcDistance(p1, p2) {
  return (google.maps.geometry.spherical.computeDistanceBetween(p1, p2) / 1000).toFixed(2);
}

</script>

Google 地图 - 如何获取两点之间的距离(以米为单位)?

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