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What is causing this ActiveRecord::ReadOnlyRecord error?
...ork around.
Using find_by_sql is not really an alternative as it returns raw row/column data, not ActiveRecords. You have two options:
Force the instance variable @readonly to false in the record (hack)
Use :include => :card instead of :join => :card
Rails 2.3.4 and above
Most of the a...
Exact difference between CharSequence and String in java [duplicate]
... See JEP 355: Text Blocks (Preview).
This effort was preceded by JEP 326: Raw String Literals (Preview).
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How to step back in Eclipse debugger?
...oes not revert global/static data) and Omniscient debugger, which is a bit raw and not so much evolving - there are a few Eclipse-based tools that could be used to "go back" in (run)time:
JIVE: Java Interactive Visualization Environment
Chronon: A “flight data recorder” for Java programs
Diver...
How to make sure that string is valid JSON using JSON.NET
I have a raw string. I just want to validate whether the string is valid JSON or not. I'm using JSON.NET.
11 Answers
...
Encoding an image file with base64
...ter you have edited your original question.
First of all, remember to use raw strings (prefix the string with 'r') when using path delimiters on Windows, to prevent accidentally hitting an escape character. Second, PIL's Image.open either accepts a filename, or a file-like (that is, the object has ...
Swift - Cast Int into enum:Int
...
Use the rawValue initializer: it's an initializer automatically generated for enums.
self.timeFilterSelected = MyTimeFilter(rawValue: (sender as UIButton).tag)!
see: The Swift Programming Language § Enumerations
NOTE: This ans...
How to keep up with the latest versions of Node.js in Ubuntu? PPA? Compiling?
...VM:
Step 1: Install NVM
Run this command in Terminal:
wget -qO- https://raw.githubusercontent.com/creationix/nvm/master/install.sh | bash
Step 2: Install node
Once NVM installation is complete, close and reopen Terminal. Then run this command:
nvm install node
Step 3: Check node version
Ru...
Quick and easy file dialog in Python?
...ed a UI, but right now I'm prompting the user for the file to parse using raw_input which is most unfriendly, especially because the user can't copy/paste the path. I would like a quick and easy way to present a file selection dialog to the user, they can select the file, and then it's loaded to ...
Difference between PCDATA and CDATA in DTD
...PIs, comments and SGML directives) in it is parsed instead of displayed as raw text. It also means that entity references are replaced.
Another type of content model allowing plain text contents is CDATA. In XML, the element content model may not implicitly be set to CDATA, but in SGML, it means th...
How to perform Callbacks in Objective-C
...ere's an example that keeps the concepts of delegates out, and just does a raw call back.
@interface Foo : NSObject {
}
- (void)doSomethingAndNotifyObject:(id)object withSelector:(SEL)selector;
@end
@interface Bar : NSObject {
}
@end
@implementation Foo
- (void)doSomethingAndNotifyObject:(id)obje...