0
投票
5答案
744 次观看

如何在mySQL中搜索已知范围内的值

假设我有这样的查询: SELECT * FROM table_name WHERE venue = "1" OR venue = "10" 那太好了,效果很好。但是,假设我有一个50个场所编号的列表。在不必写50个不同OR的情况下,有没有一种简便的方法? 谢谢!

1
投票
1答案
892 次观看

C#:端点为空(无穷大)时的范围交集

好的,我有这些交叉方法可以处理范围,并且只要范围端点不为空,它们就可以很好地工作: public static bool Intersects<T>(this Range<T> first, Range<T> second, IComparer<T> comparer) { return comparer.Compare(first.Start, second.End) <= 0 && comparer.Compare(first.End, second.Start) >= 0; }...

38
投票
1答案
8705 次观看

红宝石:“ p * 1..10”中的星号是什么意思

线 p *1..10 与...完全相同 (1..10).each { |x| puts x } 为您提供以下输出: $ ruby -e "p *1..10" 1 2 3 4 5 6 7 8 9 10 例如,当与textmate一起使用时,这是一个很好的捷径,但是星号做什么?这是如何运作的?在网上找不到任何东西...

2
投票
3答案
2149 次观看

Mysql:优化从多个范围中选择行(使用索引?)

我的桌子(项目): id, lft, rgt 1, 1, 6 2, 2, 3 3, 4, 5 4, 7, 10 5, 8, 9 6, 11, 12 7, 13, 14 您可能已经注意到,这是使用嵌套设置模型的分层数据。精美印刷的树: 1 2 3 4 5 6 7 我想选择项目1和4下的所有子项目。我可以这样: SELECT p.id FROM projects AS p, projects AS ps WHERE (ps.id = 1 OR ps.id = 4) AND p.lft BETWEEN ps.lft AND ps.rgt 但是,当运行EXPL...

1
投票
2答案
706 次观看

MySQL ORDER BY优化范围

我希望MySQL使用索引对这些行进行排序。 SELECT identity_ID FROM identity WHERE identity_modified > 1257140905 ORDER BY identity_modified 但是,这是使用文件排序进行排序(不希望的)。 现在,如果我在这里省略了ORDER BY子句,则由于使用索引满足WHERE子句的结果,这些行仅按排序。 因此,我可以通过省略WHERE子句来获得所需的行为,但是随后我依靠MySQL的行为来使行顺序到达的行为保持一致,并且将来可能会因MySQL更改其行列而st脚内部行为。 ...

1
投票
3答案
389 次观看

如何在PostgreSQL数据库中声明范围重叠约束?

假设我们有一个具有以下定义的表: range ( id bigint primary key, colourId int references colour(id), smellId int references smell(id), from bigint, to bigint ) 此表实际上是大大的表的缩小视图: item ( id bigint primary key, colourId int references colour(id), smellId int references smell(id), CONSTRAINT i...

26
投票
5答案
113845 次观看

Java中的float和double的范围包括什么?

Java中float和double的范围包括什么? 为什么不建议在精度要求很高的地方使用float或double?

4
投票
2答案
4367 次观看

Javascript高亮显示选定范围按钮

我正在尝试为页面创建一个学习工具,该工具允许用户选择页面上的任何文本并单击一个按钮。然后,该单击将格式化带有黄色背景的所选文本。我可以在单个标签内完成此工作,但是如果选择范围跨多个标签(例如,无序列表中的第一个LI和第二个的一半),则我很难应用样式。不幸的是,我不能只用一个跨度来包裹选择。 基本上,我希望与contentEditable和execCommand相关的效果在页面上实际上没有进行任何编辑,只是单击按钮将背景色应用于所选文本。 我愿意使用jQuery解决方案,并发现了此插件简化了跨浏览器创建范围的功能,但是我无法使用它将任何格式应用于所选范围。我可以从控制台中看到它正在选...

1
投票
1答案
132 次观看

XPointer范围的意义是什么?

据我所了解,XPointer规范所讨论的范围是指您可以将XML文档中的两个节点作为目标,并获得它们之间的所有内容。人们真的使用这个吗?有什么用?

3
投票
1答案
1972 次观看

跨越多个标签的范围内的SurroundContents(getRangeAt问题?)

我有一个脚本(我认为)需要使用SurroundContents来包装选择区域。这样做使我可以添加一些内容,然后将范围重新分配为选择内容。 我相信我已将问题归结为滥用getRangeAt,但我不确定如何纠正它。 这是简短的代码: function getRangeObject(selectionObject) { // Moz if (selectionObject.getRangeAt) { return selectionObject.getRangeAt(0); } 这是第89行,它...

1
投票
7答案
533 次观看

数字线的C#实现

NumberLine line = new NumberLine(); line.AddRange(1, 5); line.AddRange(20, 30); line.CheckRange(10, 25); NumberLine是代表数字线的类。我想在上面标记不同的数字范围。CheckRange方法应该返回我标记的来自10-25的哪些部分以及没有标记的部分。在这种情况下,应返回未标记10-20并标记20-25的情况。 我该如何有效地执行此操作,而o(n)不会这样做? 谢谢。 注意:这是不作业。我的自定义数据库实现事务需要此文件。我正在学习单独编程。

4
投票
5答案
2141 次观看

如果IP在IP范围之间,则限制IP

好,今天是星期五下午,我已经度过了一个漫长的一周,所以希望能得到一些帮助! 目前,我有一个IP范围列表,如下所示: List<IPRange> ipRanges = new List<IPRange>(); ipRanges.Add(new IPRange { From = "145.36.0.0", To = "145.36.255.255" }); ipRanges.Add(new IPRange { From = "194.183.227.184", To = "194.183.227.191" }); ipRanges.Add(new IPRange...

2
投票
1答案
2663 次观看

getSelection()和insertNode-Javascript文本选择

有人知道如何将浏览器选择设置为新创建的/独立创建的范围吗?我了解如何从浏览器中获取文本选择,并且了解如何创建范围,但是我不知道如何告诉浏览器将选择内容更改为我创建的范围。我本以为会像“ setSelection”之类的东西。 要清楚,我不是要选择文本区域-我是在说p / div / ul标签等。 我正在参考以下网站(也许会给您一个想法吗?): http://www.quirksmode.org/dom/range_intro.html 提前感谢您的时间。

3
投票
3答案
1557 次观看

如何查找范围数组中是否包含范围?

示例 business_hours['monday'] = [800..1200, 1300..1700] business_hours['tuesday'] = [900..1100, 1300..1700] ... 然后我有一堆事件占据了这些间隔中的一些时间,例如 event = { start_at: somedatetime, end_at: somedatetime } 遍历从特定日期到特定日期的事件,我创建了另一个数组 busy_hours['monday'] = [800..830, 1400..1415] ... 现在我的挑战是 ...

0
投票
2答案
152 次观看

sql between for DAYSOFWEEK

I have a generalized search where I'm looking up average prices for the various days of the week. The problem is I'm not sure how to ask for an odd range. 1-7 works fine, (monday-sunday), but if the user passes a sunday to a tuesday... ie 7-2 it doesn't work. 1-7 (1,2,3,4,5,6,7) 7-2 (7,1,2) e...

1
投票
1答案
465 次观看

explorer: how to highlight text after using pasteHTML method?

i replace selected text with pasteHTML method (Pastes HTML text into the given text range, replacing any previous text and HTML elements in the range.) in internet explorer. var ran = Editor.selection.createRange(); ran.pasteHTML('<span style="font-size:20px;">example</span>'); aft...

0
投票
1答案
470 次观看

range - how to select new inserted node automatically?

newNode = document.createElement("span"); newNode.innerHTML = 'example'; range.insertNode(newNode); i insert new node. is there way, how to automatically select this newNode (as it appears on page, it is not selected) ? thanks.

4
投票
1答案
11460 次观看

Keep text selection when focus changes

I have a normal textbox, and a lightbox with a text input. I want to keep the user's selection in the textbox, even when the user focuses on the lightbox's text input. Select text in normal textbox Toggle lightbox Focus on lightbox input At step 3., the user's text selection is discarded. Ho...

0
投票
2答案
11466 次观看

How to scan an IP Range C#

How to scan a specific range of IP and also increment it to user defined range.. in like most of the port scanners. but how to increase host bits.. it increases network bits.. private static void sendAsyncPingPacket(string hostToPing) { try { int timeout = 5000; ...

1
投票
2答案
1142 次观看

Strange behaviour with range.toString()

I want to get back the text that I select in an element using the Range object provided by Mozilla's flavour of javascript. So I do this: //assume that I'm only using Firefox, and there is just one selection var range = window.getSelection().getRangeAt(0); var rangeText = range.toString(); Th...

20
投票
7答案
26266 次观看

Range of Years in JavaScript for a select box

I'm trying to create a dynamic select box in JavaScript with a range of years starting with 'some' year and ending with the current year. Is there anything like Ruby's range class in JavaScript or do I have to loop trough the years using a for loop? Here's what I've come up with though I think ...

1
投票
1答案
1429 次观看

Tinymce IE6+ How can I get a working range?

I've searching forever trying to figure out why IE will not save the current caret position and then reload it. To be descriptive of the situation it works like this: Client wants Tinymce custom built with an ajax image loader that is simplistic in the nature that any "idiot" can upload and set...

1
投票
1答案
12759 次观看

VBA Copy and paste a range of numbers

I'm trying to copy and paste a range, to create a 28 by 28 grid of numbers "rotating" the values so that each time the range is pasted into the next column, the range is moves down by one row and the last value "overflows" back to the top of the next row, I've got this far but am stumped on the o...

1
投票
1答案
373 次观看

safari: get the word under the mouse pointer

i'm trying to find a clicked word in an onclick event handler. somediv.onclick = function(event) { var w = getClickedWord(event); alert(w) } getClickedWord() uses range.moveToPoint for msie and event.rangeParent/offset for gecko, but Webkit seems to support neither. Any pointers?

5
投票
2答案
2272 次观看

One-Dimensional Line-Segments/Ranges Intersection Test: Solution Name?

I've worked out a method to test if two one-dimensional line-segments/ranges. So defining a range as: [min, max] Given two instances of range: a = [min, max] b = [min, max] I use the following to test if they intersect: (a.max - b.min) * (b.max - a.min) >= 0. I think this is a one-...

3
投票
3答案
1627 次观看

Delphi: How to have non-contiguous subrange enumeration type?

While the following subrange enumeration declaration works: type TReceiptCode = 'A'..'F'; This does not: type TReceiptCode = ' ','A'..'F', 'R'; Nor does type TReceiptCode = ' ','A','B','C','D','E','F','R'; How can i declare a subrange type with non-contiguous values?

3
投票
5答案
6346 次观看

double type digits in C++

The IEE754 (64 bits) floating point is supposed to correctly represent 15 significant digit although the internal representation has 17 ditigs. Is there a way to force the 16th and 17th digits to zero ?? Ref: http://msdn.microsoft.com/en-us/library/system.double(VS.80).aspx : . . Remember that...

1
投票
4答案
1916 次观看

Enumerable.Range implementation

What is the precise implementation of Enumerable.Range in .Net; preferable .Net 4? Is it a yielded for-loop? A custom implementation (IEnumerable, IEnumerator) or?

1
投票
2答案
754 次观看

Why doesn't the wdBorderVertical exist when using a range of cells instead of a selection?

FYI, I'm using Perl and Win32::OLE, but the error is a Word VBA one. Using Perl's Win32::OLE module, I'm trying to create a table in Word and format certain elements of it. I created the table (15 x 3) and successfully created a range object pointing to the cells from (2, 1) to (14, 3), i.e. all...

1
投票
1答案
939 次观看

How to get Zend Lucene Range Search working properly (or help me debug)

I have an implementation of the Zend Search (Lucene) framework on my website that contains an index of products with prices. I am trying to allow customers to search for something, while contsraining the prices. Eg. Search for "dog food" between $5-$10 dollars. My search index looks like this:...