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Paperclip::Errors::MissingRequiredValidatorError with Rails 4
...ype
validates_attachment_content_type :image, :content_type => ["image/jpg", "image/jpeg", "image/png", "image/gif"]
-OR- another way
validates_attachment :image, content_type: { content_type: ["image/jpg", "image/jpeg", "image/png", "image/gif"] }
-OR- yet another way
is to use regex for ...
Force browser to download image files on click
...in hrefs. So if you want to create <a href="https://i.imgur.com/IskAzqA.jpg" download> on a domain other than imgur.com it will not work as intended. Chrome deprecations and removals announcement
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Bash: Copy named files recursively, preserving folder structure
...ports that, but that works on Linux.
cp --parents src/prog.js images/icon.jpg /tmp/package
If that doesn't work on OS X, try
rsync -R src/prog.js images/icon.jpg /tmp/package
as aif suggested.
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Two forward slashes in a url/src/href attribute [duplicate]
...e referenced by non protocol relative URLs (i.e. http://example.com/banner.jpg), customers reaching the https enabled checkout will be greeted with a rather unfriendly
"there are insecure elements on this page"
prompt - which, as you can imagine, throws the average non-tech-savvy person off.
If th...
Android微信智能心跳方案 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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可根据自身产品的特点选择合适的心跳范围。
4.3.3 状态转换图
4.3.4自适应心跳算法描述
1、按网络类型区分计算：
因为每个网络的NAT时间可能不一致。所以需要区分计算，数据网络按subType做关键字，WIFI按WIFI名做关键字。
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使用std::string作为std::map的key出错解决 - C/C++ - 清泛网 - 专注C/C++及内核技术
...string”不定义该运算符或到预定义运算符可接收的类型的转换
反正是乱七八糟的错误，原因很简单，少了 #include <string>
（注意，不是string.h，如果包含了string.h，请改为string）std::string std::map key
Saving image from PHP URL
... the image http://example.com/fetch-image.php?url=http://blabla.com/flower.jpg. In the case of this example, you could just call $_GET['url'] in your PHP script, like so: $ch = curl_init($_GET['url']);.
– Mathias Bynens
Nov 29 '09 at 13:04
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Adding a background image to a element
.... I know it is possible to do something like:background-image: url("image.jpg"), url("image2"); but doing this, both images will be in the same place, kinda "overlaying" each other, and I want to set different positions for them.
– PaulP1
Mar 2 '19 at 14:41
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How to randomize two ArrayLists in the same fashion?
...t and imgList which related to each other, e.g. "H1.txt" related to "e1.jpg". How to automatically randomized the list of imgList according to the randomization of fileList ? Like in excel, if we sort certain column, the other column will automatically follow?
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How to use 'cp' command to exclude a specific directory?
...ob.
Example:
$ shopt -s extglob
$ echo images/*
images/004.bmp images/033.jpg images/1276338351183.jpg images/2252.png
$ echo images/!(*.jpg)
images/004.bmp images/2252.png
So you just put a pattern inside !(), and it negates the match. The pattern can be arbitrarily complex, starting from enumera...