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What is the difference between Ruby 1.8 and Ruby 1.9
...
{"a","b"} No Longer Supported
Ruby 1.9
irb(main):002:0> {1,2}
SyntaxError: (irb):2: syntax error, unexpected ',', expecting tASSOC
Ruby 1.8.6
irb(main):001:0> {1,2}
=> {1=>2}
Action: Convert to {1 => 2}
Array.to_s Now Contains Punctuation
Ruby 1.9
irb(main):001:0> [1,...
How can I view the source code for a function?
...y the partial signature
getMethod("extract",signature="SpatialPolygons")
#Error in getMethod("extract", signature = "SpatialPolygons") :
# No method found for function "extract" and signature SpatialPolygons
Functions that call unexported functions
In the case of ts.union, .cbindts and .makeNa...
Insert code into the page context using a content script
...nclude:
"web_accessible_resources": ["script.js"],
If not, the following error will appear in the console:
Denying load of chrome-extension://[EXTENSIONID]/script.js. Resources must be listed in the web_accessible_resources manifest key in order to be loaded by pages outside the extension.
Metho...
How to apply multiple styles in WPF
...ed number of constructor parameters, so this approach results in a compile error. If I knew in advance how many styles I wanted to merge, I could have used the same XAML syntax with a constructor taking the desired number of strings:
public MultiStyleExtension(string inputResourceKey1, string input...
What is the proper way to re-attach detached objects in Hibernate?
...ct of the same identity MAY already exist in the session, which will cause errors.
18 Answers
...
PUT vs. POST in REST
...on> HTTP/1.1
Host: www.example.com/
Note that the following is an error:
POST /questions/<new_question> HTTP/1.1
Host: www.example.com/
If the URL is not yet created, you
should not be using POST to create it
while specifying the name. This should
result in a 'resource n...
How to use git bisect?
...eird "You need to run this command from the toplevel of the working tree." error.
– Paul Whitehead
Aug 24 '17 at 8:59
...
What's the difference between using “let” and “var”?
...t baz = "Bazz";
console.log(baz);
}
console.log(baz); // ReferenceError
}
run();
The reason why let keyword was introduced to the language was function scope is confusing and was one of the main sources of bugs in JavaScript.
Take a look at this example from another stackoverflow questi...
Can a class member function template be virtual?
... like this:
X x;
x.func2<string>("X x");
g++ report the following error:
vtempl.cpp:34: error: invalid use of `virtual' in template declaration of `virtu
al void X::func2(const T&)'
So it is obvious that:
virtual member function can be used in a class template. It is easy for compi...
Better explanation of when to use Imports/Depends
...s the @import ggplot2 tag and my package has Imports: ggplot2 but I get an error: Error in eval(expr, envir, enclos) : could not find function "autoplot" when I try to use it.
– nathaneastwood
Mar 16 '15 at 11:35
...