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Matching an empty input box using CSS
...d
#foo-thing:valid + .msg { visibility: visible!important; }
<input type="text" id="foo-thing" required="required">
<span class="msg" style="visibility: hidden;">Yay not empty</span>
See live on jsFiddle
OR negate using #foo-thing:invalid (credit to @SamGoody...
Repeat Character N Times
In Perl I can repeat a character multiple times using the syntax:
23 Answers
23
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How can I remove all objects but one from the workspace in R?
...e. Run this at your own risk - it will remove all variables except x:
x <- 1
y <- 2
z <- 3
ls()
[1] "x" "y" "z"
rm(list=setdiff(ls(), "x"))
ls()
[1] "x"
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What are these attributes: `aria-labelledby` and `aria-hidden`
...priate to use an existing element as a label (semantic) without using the <label> HTML tag. With HTML modals the label is usually a <h> header. So in the Bootstrap modal case, you add aria-labelledby=[IDofModalHeader], and the screen reader will speak that header when the modal appears....
How do I properly clean up Excel interop objects?
...t way of doing the above is:
Worksheets sheets = excelApp.Worksheets; // <-- The important part
Worksheet sheet = sheets.Open(...);
...
Marshal.ReleaseComObject(sheets);
Marshal.ReleaseComObject(sheet);
POST MORTEM UPDATE:
I want every reader to read this answer by Hans Passant very carefully...
Convert String to Type in C# [duplicate]
...oo. See the documentation for Type.GetType(string) for more information.
Alternatively, if you have a reference to the assembly already (e.g. through a well-known type) you can use Assembly.GetType:
Assembly asm = typeof(SomeKnownType).Assembly;
Type type = asm.GetType(namespaceQualifiedTypeName);...
Apache2: 'AH01630: client denied by server configuration'
...
In my case I have error in DocumentRoot and <Directory> paths.
– Roman Grinyov
Jan 3 '17 at 20:19
4
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C/C++ include header file order
...our method can introduce hidden dependencies, say if myclass.cpp includes <string> then <myclass.h>, there's no way to catch at build time that myclass.h may itself depend on string; so if later on you, or someone else, includes myclass.h but don't need string, you'll get an error that n...
How can I open Java .class files in a human-readable way?
...ould work fine. It's part of the standard JDK installation.
Usage: javap <options> <classes>...
where options include:
-c Disassemble the code
-classpath <pathlist> Specify where to find user class files
-extdirs <dirs> Override...
ASP MVC in IIS 7 results in: HTTP Error 403.14 - Forbidden
...ion. I tried all options described above to no avail, when I noticed the
<system.webServer>
<modules runAllManagedModulesForAllRequests="true"/>
</system.webServer>
was missing from my web.config.
After adding this, everything worked. Simple, but easy to overlook...
EDIT:
Of ...