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Persistent invalid graphics state error when using ggplot2
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I ran into this same error and solved it by running:
dev.off()
and then running the plot again. I think the graphics device was messed up earlier somehow by exporting some graphics and it didn't get reset. This worked for me and it's simpler than reinstalling gg...
How do I create a datetime in Python from milliseconds?
I can create a similar Date object in Java by java.util.Date(milliseconds) . How do I create the comparable in Python?
5 A...
jQuery Validate - Enable validation for hidden fields
In the new version of jQuery validation plugin 1.9 by default validation of hidden fields ignored . I'm using CKEditor for textarea input field and it hides the field and replace it with iframe. The field is there, but validation disabled for hidden fields. With validation plugin version 1.8.1 ever...
Java inner class and static nested class
...atic field of the class, A. That does not mean the anonymous class created by 'new A() { int t() { return 2; } }' is static any more than if I simply assigned any other object to the static field, a, as in: class B { static void main(string s) {A.a = new A()}} (A & B in same package) This doesn'...
Memcache Vs. Memcached [duplicate]
... naming conventions (for those unfamiliar), which explains the frustration by the question asker: For many *nix applications, the piece that does the backend work is called a "daemon" (think "service" in Windows-land), while the interface or client application is what you use to control or access th...
Extract file basename without path and extension in bash [duplicate]
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Is there a way to combine ##*/ at %.* (by nesting or piping or whatnot) arrive at foo directly?
– bongbang
Nov 26 '14 at 22:09
4
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How to create id with AUTO_INCREMENT on Oracle?
...is now available on Oracle 12c:
create table t1 (
c1 NUMBER GENERATED by default on null as IDENTITY,
c2 VARCHAR2(10)
);
or specify starting and increment values, also preventing any insert into the identity column (GENERATED ALWAYS) (again, Oracle 12c+ only)
create table t1 (
c1...
Which kind of pointer do I use when?
...y and you want to adopt it to the RAII principle. This one was not adopted by the standard.
Unique ownership:
Boost also has a scoped_ptr, which is not copyable and for which you can not specify a deleter. std::unique_ptr is boost::scoped_ptr on steroids and should be your default choice when you n...
“From View Controller” disappears using UIViewControllerContextTransitioning
...'s view is going to be hidden (removed from the view hierarchy) completely by the end of transition. In other words it means that after the initial presentation animation finishes only the presented view controller's view will be visible and not the presenting view controller's view. For example if ...
What exactly is the meaning of an API? [closed]
...a C library
Core Windows system calls: WinAPI
The Classes and Methods in Ruby's core library
The Document Object Model exposed by browsers to JavaScript
Web services, such as those provided by Facebook's Graph API
An implementation of a protocol such as JNI in Java
Happy coding.
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