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What's the difference between Ruby's dup and clone methods?
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Subclasses may override these methods to provide different semantics. In Object itself, there are two key differences.
First, clone copies the singleton class, while dup does not.
o = Object.new
def o.foo
42
end
o.dup.foo # raises NoMetho...
Change the image source on rollover using jQuery
...have a few images and their rollover images. Using jQuery, I want to show/hide the rollover image when the onmousemove/onmouseout event happen. All my image names follow the same pattern, like this:
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Generate a random double in a range
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Ah I see. Basically, multiplying a number that can take a finite set of values doesn't change the size of that set.
– Kartik Chugh
Aug 22 '19 at 14:27
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How to set SQL Server connection string?
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.NET DataProvider -- Standard Connection with username and password
using System.Data.SqlClient;
SqlConnection conn = new SqlConnection();
conn.ConnectionString =
"Data Source=ServerName;" +
"Initial Catalog=DataBaseName;" +
"User...
What's the meaning of Base SDK, iOS deployment target, Target, and Project in xcode
...un on iOS 7, iOS 8 and iOS 9, and that you have available to you any iOS 9 calls when actually running on iOS 9.
You can read more in my post SDK and Deployment Target
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How to read file contents into a variable in a batch file?
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@IulianOnofrei, set /p calls cmd!ReadBufFromInput with a stack allocated buffer to read 1023 wide characters (2046 bytes). It reads 1023 bytes from the file, assuming 1 byte per OEM/ANSI character, but it decodes the file using the current codepage...
Init method in Spring Controller (annotation version)
... can have your class implement the InitializingBean interface to provide a callback function (afterPropertiesSet()) which the ApplicationContext will invoke when the bean is constructed.
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SQL query to get all values a enum can have
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The unnest call will return records of type myenum with a column name of "myenum". You might also want to cast the enum to text and specify a column name by adding something like. ::text AS my_column
– Justin O...
What is the difference between Amazon S3 and Amazon EC2 instance?
... PHP code and a database server.
Amazon S3 is just a storage service, typically used to store large binary files. Amazon also has other storage and database services, like RDS for relational databases and DynamoDB for NoSQL.
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POST request send json data java HttpUrlConnection
...));
wr.write(parent.toString());
So, the JSONObject.toString() should be called only once for the outer object.
Another thing (most probably not your problem, but I'd like to mention it):
To be sure not to run into encoding problems, you should specify the encoding, if it is not UTF-8:
con.setR...