offset

First element offset

由 你。 提交于 2019-12-10 21:07:59
问题 Is it a WARRANTY, that offset of first element of structure is 0? To be more accurate, lets consider struct foo { int a; double b; }; struct foo *ptr=malloc(sizeof(struct foo)); int *int_ptr = &ptr->a; free(int_ptr) Is it garantied, that it is valid always, under any os or any other factors? 回答1: Yes it is guaranteed. Will get you a standard quote, let me lookup. C99 Standard: §6.7.2.1 Para 12 Within a structure object, the non-bit-field members and the units in which bit-fields reside have

Can I apply offset to continious anchor in jsplumb

由 人走茶凉 提交于 2019-12-10 19:06:48
问题 I want to use the "continuous" anchor placement option in jsplumb. This works great, but the anchor is placed half inside the container div and half outside of the container. I would like the anchors to be completely outside the container div. If possible event with a small space between the div and the anchor (one or two pixels). My purpose is to put those anchors on top of the arrows of the connections. I then want to make the anchors transparent so the user can "click on the arrows and

offsetParent() in jQuery not returning expected relative-positioned ancestor

由 北城余情 提交于 2019-12-10 17:22:52
问题 I have some HTML with the following approximate structure and positioning: <div class="grand-parent" style="position: absolute"> <div class="parent" style="position: relative"> <div class="child"></div> </div> </div> In my jQuery widget, I'm trying to insert an element that is located inside the "offset parent" of the element targeted by the widget. To do so, I essentially have code like this: var targetElement = $('.child'); $('<div/>').appendTo(targetElement.offsetParent()); Unfortunately,

How get the offset of term in Lucene?

由 橙三吉。 提交于 2019-12-10 15:53:19
问题 I want to get the offset of one term in the Lucene . How can i get it ? I vectored my content as Field.TermVector.WITH_POSITIONS_OFFSETS Is there any method in Lucene that give me offset of the term in one Document ? 回答1: Try this: TermPositionVector vector = (TermPositionVector) reader.getTermFreqVector(docId, myfield); See http://lucene.apache.org/core/3_0_3/api/core/org/apache/lucene/index/TermPositionVector.html to get the info you want. 来源： https://stackoverflow.com/questions/2930339/how

Change the opacity based on elements current offset

由 雨燕双飞 提交于 2019-12-10 15:12:59
问题 I try to set the opacity for some images, based on each current offset . The problem is, that the opacity is not equal to all images if you scroll far down. That's what I try to accomplish, for each image: ################ # # # # # # # === <= opacity 1 # # # *** <= opacity 0.6 # # ################ ... <= opacity 0 Currently it works only for the first ~2-3 images. All further down are not set from 0-1 , rather than from 0.5-40 or else. Another problem is, that if the scroll-offset is 0 , all

PHP Warning: Illegal string offset

由 本小妞迷上赌 提交于 2019-12-10 14:46:53
问题 I am newbie in PHP. A PHP was migrated today from 5.3.3 to 5.4.4 version (Debian Squeeze to Debian Wheezy) and, after this, I get this error from Apache log : > PHP Warning: Illegal string offset 'phptype' in xyz The line is: self::$conn[$dsn['phptype']] = $mdb2; I need help to restore the system. 回答1: <?php $a = 'Hello'; echo $a['whatever']; ?> As some of the guys in the comments are saying, doing something like this would probably cause that error. As you can see in the example above $a is

I have a has_many relationships and I want to set custom limit and offset. as well as to count them

由 我是研究僧i 提交于 2019-12-10 13:53:33
问题 Hy, My code: @profile.images and i would like to get only 10 images at time and with a 10 offset, like this @profile.images(:limit => 10, :offset => 10) and not like this has_many :images, :limit => 10, :offset => 10 Then I would like to count in someway all the images for that profile. @profile.count_images Thanks (: has_many :images, :foreign_key => 'on_id', :conditions => 'on_type = "profile"' do def paginate(page = 1, limit = 10, offset = nil) page = nil if page < 1 limit = 1 if limit < 1

【Python3网络爬虫开发实战】6.4-分析Ajax爬取今日头条街拍美图【华为云技术分享】

由 旧时模样 提交于 2019-12-10 13:43:26
【摘要】 本节中，我们以今日头条为例来尝试通过分析Ajax请求来抓取网页数据的方法。这次要抓取的目标是今日头条的街拍美图，抓取完成之后，将每组图片分文件夹下载到本地并保存下来。 1. 准备工作 在本节开始之前，请确保已经安装好requests库。如果没有安装，可以参考第1章。 2. 抓取分析 在抓取之前，首先要分析抓取的逻辑。打开今日头条的首页 http://www.toutiao.com/，如图6-15所示。 图6-15 首页内容 右上角有一个搜索入口，这里尝试抓取街拍美图，所以输入“街拍”二字搜索一下，结果如图6-16所示。 图6-16 搜索结果 这时打开开发者工具，查看所有的网络请求。首先，打开第一个网络请求，这个请求的URL就是当前的链接http://www.toutiao.com/search/?keyword=街拍，打开Preview选项卡查看Response Body。如果页面中的内容是根据第一个请求得到的结果渲染出来的，那么第一个请求的源代码中必然会包含页面结果中的文字。为了验证，我们可以尝试搜索一下搜索结果的标题，比如“路人”二字，如图6-17所示。 图6-17 搜索结果 我们发现，网页源代码中并没有包含这两个字，搜索匹配结果数目为0。因此，可以初步判断这些内容是由Ajax加载，然后用JavaScript渲染出来的。接下来，我们可以切换到XHR过滤选项卡

Getting content offset of List in SwiftUI

由 拜拜、爱过 提交于 2019-12-10 13:17:25
问题 I'm trying to create a parallax header effect in SwiftUI like this one https://twitter.com/KhaosT/status/1140814602017464320 , but don't really know how to get content offset of the list while scrolling. Does anyone have know how to calculate the content offset of the list while scrolling? 回答1: I provided a reusable solution for the ScrollView case on this answer which makes use of View Preferences as a method to notify layout information upstream in the View Hierarchy. For a detail

Highlight text based on index in textContent

由 北城以北 提交于 2019-12-10 12:36:50
问题 Bounty The bounty will go to the fastest solution, as demonstrated by jsPerf, across the latest release versions of Firefox, Chrome and Internet Explorer at time of testing or the answer most useful in creating such a solution at my discretion . Mwahahaha! I'll be mostly satisfied with a solution that takes all of the offset s and an unprocessed <span> and adds the highlighting to that, so that parent.textContent = parent.textContent followed by running the solution on an updated list of
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