dimensions | 易学教程

outerHeight(true) gives wrong value

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问题 I want the height of a container element, including margins and paddings. When I hover over the element in Chrome development tool, I get the value that I'm looking for but when I use jQuery $('element').outerHeight(true) ; I get a much smaller value. The element contains a jQuery carousel (in a container with position:relative and items position: absolute ), could that have something to do with it? Thanks in advance 回答1: I have experience this issue several times, and the best solution,

Google Analytics Custom Dimension Not Being Set

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问题 I've recently upgraded our site to use Universal Analytics and am trying to get some custom dimensions to work. However, no custom dimension data appears to be logged. Below is an example of my code. ga('create', 'UA-XXXXX', 'test.com'); ga('send', 'pageview'); ga('set', 'dimension1', '149377'); Do I need to set custom dimensions before sending pageview? 回答1: A dimension is sent along with the either a page view or an event. It won't get sent by itself. So you should switch the order of the

Google Analytics Custom Dimension Not Being Set

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Is there a simple way to get image dimensions in Ruby?

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问题 I'm looking for an easy way to get width and height dimensions for image files in Ruby without having to use ImageMagick or ImageScience (running Snow Leapard). 回答1: libimage-size is a Ruby library for calculating image sizes for a wide variety of graphical formats. A gem is available, or you can download the source tarball and extract the image_size.rb file. 回答2: As of June 2012, FastImage which "finds the size or type of an image given its uri by fetching as little as needed" is a good

How to get the image dimension from the file name

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问题 I have a file called FPN = "c:\ggs\ggs Access\images\members\1.jpg " I'm trying to get the dimension of image 1.jpg , and I'd like to check whether image dimension is valid or not before loading, and if either width or height of the image is less than or equal to zero, pop up a message like "image not in correct format" Can anyone help me please? 回答1: System.Drawing.Image img = System.Drawing.Image.FromFile(@"c:\ggs\ggs Access\images\members\1.jpg"); MessageBox.Show("Width: " + img.Width + ",

How to get the height and width of an ImageView/Bitmap in Android

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问题 I want to get the height and width of an image bitmap that is either in ImageView or a background image. Please help me, any help will be appreciated. 回答1: You can get height and width of ImageView by using getWidth() and getHeight() through while this will not give you the exact width and height of the image, for getting the Image width height first you need to get the drawable as background then convert drawable to BitmapDrawable to get the image as Bitmap from that you can get the width

In Fortran 90, do array dimensions have to be declared beforehand?

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问题 Is it necessary to declare array dimensions before any other code? For example, I have written the following simplified example code: PROGRAM mytest IMPLICIT NONE INTEGER :: i, j, k, mysum ! Let array c be a k-by-k**2 array ! Determine k within the program by some means...for example, mysum=0 DO i=1, 3 mysum=mysum+1 END DO k=mysum REAL, DIMENSION(k, k**2) :: c WRITE(*,*) "k=", k WRITE(*,*) "k**2=", k**2 WRITE(*,*) DO i=1,size(c,1) WRITE(*,"(100(3X,F3.1))") (c(i,j), j=1,size(c,2)) END DO END

Total width of element (including padding and border) in jQuery

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问题 As in the subject, how can one get the total width of an element, including its border and padding, using jQuery? I've got the jQuery dimensions plugin, and running .width() on my 760px-wide , 10px padding DIV returns 760 . Perhaps I'm doing something wrong, but if my element manifests itself as 780 pixels wide and Firebug tells me that there's 10px padding on it, but calling .width() only gives 760, I'd be hard pressed to see how. Thanks for any suggestions. 回答1: [Update] The original answer

Get image dimensions with Javascript before image has fully loaded

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问题 I've read about various kinds of ways getting image dimensions once an image has fully loaded, but would it be possible to get the dimensions of any image once it just started to load? I haven't found much about this by searching (which makes me believe it's not possible), but the fact that a browser (in my case Firefox) shows the dimensions of any image I open up in a new tab right in the title after it just started loading the image gives me hope that there actually is a way and I just

promql查询表达式

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Basics 即时矢量选择器 =：匹配与标签相等的内容 !=：不匹配与标签相等的内容 =~: 根据正则表达式匹配与标签符合的内容 !~：根据正则表达式不匹配与标签符合的内容示例： http_requests_total{environment=~"staging|testing|development",method!="GET"} #这将匹配method不等于GET,environment匹配到staging，testing或development的http_requests_total请求内容。向量选择器必须指定一个名称或至少一个与空字符串不匹配的标签匹配器。以下表达式是非法的 {job=~".*"} # Bad! 相反，这些表达式是有效的，因为它们都有一个与空标签值不匹配的选择器。 {job=~".+"} # Good! {job=~".*",method="get"} # Good! 范围矢量选择器持续时间仅限于数字，接下来是以下单位之一： s - seconds m - minutes h - hours d - days w - weeks y - years 在此示例中，我们选择在过去5分钟内为度量标准名称为http_requests_total且标签设置为job=prometheus的所有时间序列记录的所有值： http_requests_total{job=