offset | 易学教程

MySQL: I need to get the offset of a item in a query

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问题 Mysql: i need to get the offset of a item in a query. I have a image gallery: this show 6 image per stack, so when i request image 22 it shows images from 18 to 24. It should first get the offset of the image 22, then get the images from 18 to 24. Another example: i request the image number 62(and offset 62), it will select images with offset from 60 to 66. Is possible with a single query? The main important thing is to get the offset value of the item that has its id equal to a number.

Reset consumer offset to the beginning from Kafka Streams

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问题 I am using Kafka streams and want to reset some consumer offset from Java to the beginning. KafkaConsumer.seekToBeginning(...) sounds like the right thing to do, but I work with Kafka Streams: KafkaStreams streams = new KafkaStreams(builder, props); ... streams.start(); I guess that depending on the concrete streams pipeline I define this would create several consumers under the hood. Can I get access to those? Or is there some other way to reset offsets programmatically? 回答1: Since you are

JavaScript detect text offset in node at position

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问题 I would like to detect the element and text offset under the specified x and y co-ordinates. Let's say we have such DOM: <p> Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nam quis nisl lectus. Donec euismod dignissim turpis, nec viverra nulla iaculis nec. _Fusce_ mattis orci eget nibh rhoncus auctor at in enim. </p> When the user clicks the mouse just before the word _Fusce_ having the x and y co-ordinates I would like to obtain the offset of the word _Fusce_ in the text node as an

Converting character offsets into byte offsets (in Python)

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问题 Suppose I have a bunch of files in UTF-8 that I send to an external API in unicode. The API operates on each unicode string and returns a list with (character_offset, substr) tuples. The output I need is the begin and end byte offset for each found substring. If I'm lucky the input text contains only ASCII characters (making character offset and byte offset identical), but this is not always the case. How can I find the begin and end byte offsets for a known begin character offset and

Find UTC Offset given a city

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问题 In C++ on Windows, given a city, lets say london or newyork or sydney or singapore etc.. how do I find the UTC offset for each of them, ie the function should be able to accept a city name and return the UTC offset in the current scenario ie taking into account daylight savings. Any ideas how this can be done using win32 APIs 回答1: Sounds like you want an API for searching the zoneinfo / tz database..? Don't know if there is a library with precisely the interface you want. But reading it and

Twitter Bootstrap: icons in button dropdown

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问题 Here is the link on jsfiddle with some demo. It works well in Chrome and even in IE, but in FF icons get down. How can I fix it without moving them up with negative margins or something like this? I have no ideas why this happens. 回答1: Just add the following style .dropdown-menu a { white-space:normal; } DEMO. 来源： https://stackoverflow.com/questions/11694866/twitter-bootstrap-icons-in-button-dropdown

Calendar, offset overlapping events

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问题 I am trying to write a calendar in PHP. In week view, I want my events to be listed like iCal, where simultaneous events reduces their width to half size. I have an extremely hard time figuring this one out though, so I hope you can help me. What I want is that if one event is overlapping another, it should set [split] => true on both event arrays - or something in that direction (read: I am unsure whether this is the most efficient solution). Then I can check for split == true in the foreach

Getting byte offset of line in a text file?

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问题 I have a text file like one two three four five I need to get the offset of each line in the file. How do I do this in Java? I have searched through some of the I/O libraries(like BufferedReader and RandomAccessFile) but I'm unable to find a satisfactory answer to this. Can anyone suggest how to deal with this? 回答1: Another approach would be to count the bytes of each line line this BufferedReader br = null; try { String line; // in my test each character was one byte ArrayList<Integer>

javascript三大家族：offset属性 scroll属性 client属性

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(1)offset属性： 1.1 offsetWidth = width + border + padding 1.2 offsetHeight = height + border + padding 1.3 offsetTop = 元素相对于浏览器顶部的距离 1.4 offsetLeft = 元素相对于浏览器左边的距离功能：只读（获取）不写（设置） 1.5 子元素的offsetTop和offsetLeft：关键看父元素是否设置了定位，若有则相对于父元素的上边框和左边框的距离；若没有则相对于浏览器顶部和左边的距离。 1.6 offsetParent:嵌套关系的标签，默认选中的是body，若父元素添加了定位，则选中的是父元素。如big标签下是small标签，var ele = small.offsetParent;console.log(ele) (2)scroll属性： 2.1 scrollWidth = width + padding-left + padding-right 2.2 scrollHeight = height + padding-top + padding-bottom 2.3 scrollTop = 滚动条滚动之后相对于浏览器顶部的距离 2.4 scrollLeft = 滚动条滚动之后相对于浏览器左边的距离 2.5 根元素引用scrollTop属性

How to get the correct offset top value from webkit (Chrome/Safari) with jQuery? Webkit bug?

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I'm working on code that programmatically positions a div to give the appearance of scrolling. All works fine when using Firefox and Internet Explorer (believe it or not). However, I'm getting bogus values from webkit browsers (Chrome/Safari). It appears to have something to do with whether an element has content. I'm calculating the position of an empty anchor element. Webkit seems to get it right only when the element has visible content. So, I could work around this by having some content in my anchor. However, that messes up my layout and feels like a kludge. Also, I'd like to log a bug,