大约有 1,410 项符合查询结果（耗时：0.0333秒） [XML]
Paperclip::Errors::MissingRequiredValidatorError with Rails 4
... Paperclip will also throw "Missing Required Validator Error" in case of PDF file upload. The workaround for that is: First install the "GhostScript" and then add "application/pdf" to content-type.
– HackerKarma
Mar 10 '14 at 15:41
...
How do I upload a file with metadata using a REST web service?
...8029299
Content-Disposition: form-data; name="name"; filename="myfilename.pdf"
Content-Type: application/octet-stream
%PDF-1.4
%
2 0 obj
<</Length 57/Filter/FlateDecode>>stream
x+r
26S00SI2P0Qn
F
!i\
)%!Y0i@.k
[
endstream
endobj
4 0 obj
<</Type/Page/MediaBox[0 0 595 842]/Resourc...
File Upload ASP.NET MVC 3.0
...GetExtension(Request.Files[0].FileName).ToLower();
if (extension != ".pdf" && extension != ".doc" && extension != ".docx" && extension != ".rtf" && extension != ".txt")
{
ModelState.AddModelError("uploadError", "Supported file extensions: pdf, doc, do...
Pandoc markdown page break
... to use raw LaTeX \newpage. This works perfectly when outputting LaTeX (or pdf created through LaTeX). However, one will run into problems when targeting different formats like HTML or docx.
A simple solution when targeting other formats is to use a pandoc filter which can transform the internal do...
App Inventor 2 拓展参考文档 · App Inventor 2 中文网
...，BASE64编码/解码
【AES加解密】MareshaAES 拓展：AES加解密算法
【CRC校验】App Inventor 2 CRC16 拓展
【二进制】UrsAI2ByteArray 字节数组扩展：读写二进制数据
【数据库】LeanDB 数据库扩展
【数据库】MySQL + php后端数据库
【数据...
OpenSSH升级后不能登录的问题 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...启正常了，SSH 无法登陆的问题还是没有解决
又有说是算法的问题
http://bbs.51cto.com/thread-1176918-1.html
照做还是不行， 于是陷入了无休止的找资料之中
回过头来在来看
http://pkgs.org/centos-6/ghettoforge-testing-x86_64/openssh-6.6...
Specifying and saving a figure with exact size in pixels
...I is not supported by all backends. Here, the PNG backend is used, but the pdf and ps backends will implement the size differently. Also, changing the DPI and sizes will also affect things like fontsize. A larger DPI will keep the same relative sizes of fonts and elements, but if you want smaller fo...
Disabling browser print options (headers, footers, margins) from page?
...from the margins; see What does the mozdisallowselectionprint attribute in PDF.js do?.
Other browsers
Unfortunately, there seems to be no way to resolve this problem in Internet Explorer, so you'll have to resort to PDF or ask users to disable margin texts.
The same goes for Safari; according to a c...
Why does C++11 not support designated initializer lists as C99? [closed]
... standard: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0329r4.pdf
This brings limited support for c99's Designated Initializers. This limitation is described as follows by C.1.7[diff.decl].4, given:
struct A { int x, y; };
struct B { struct A a; };
The following Designated Initializa...
Why can't C++ be parsed with a LR(1) parser?
...biguities".
It goes on to give a number of examples (see page 147 of the pdf).
The example is:
int(x), y, *const z;
meaning
int x;
int y;
int *const z;
Compare to:
int(x), y, new int;
meaning
(int(x)), (y), (new int));
(a comma-separated expression).
The two token sequences have the ...