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Can you write virtual functions / methods in Java?
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I wonded if it's really true, because for what I've read, in Java, dynamic method dispatch happens only for the object the method is called on - as explained here so the example explaining virtual functions for C++ here is not valid for java.
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Moving default AVD configuration folder (.android)
...ve. As far as I know this is the default folder of Android Virtual Devices for configuration files.
4 Answers
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What is the difference between Amazon S3 and Amazon EC2 instance?
...inary files. Amazon also has other storage and database services, like RDS for relational databases and DynamoDB for NoSQL.
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What does the JSLint error 'body of a for in should be wrapped in an if statement' mean?
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First of all, never use a for in loop to enumerate over an array. Never. Use good old for(var i = 0; i<arr.length; i++).
The reason behind this is the following: each object in JavaScript has a special field called prototype. Everything you add to...
Loading custom configuration files
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the articles posted by Ricky are very good, but unfortunately they don't answer your question.
To solve your problem you should try this piece of code:
ExeConfigurationFileMap configMap = new ExeConfigurationFileMap();
configMap.ExeConfigFilename = @"d:\test\justAConfigFil...
Random row selection in Pandas dataframe
... n)]
Note: As of Pandas v0.20.0, ix has been deprecated in favour of loc for label based indexing.
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How to quickly edit values in table in SQL Server Management Studio?
...tree on the left, select SQL Server Object Explorer. Set the option "Value for Edit Top Rows command" to 0. It'll now allow you to view and edit the entire table from the context menu.
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Replace all non-alphanumeric characters in a string
...sn't a standard character or number such as (a-z or 0-9) with an asterisk. For example, "h^&ell`.,|o w]{+orld" is replaced with "h*ell*o*w*orld". Note that multiple characters such as "^&" get replaced with one asterisk. How would I go about doing this?
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Showing data values on stacked bar chart in ggplot2
...ng, which makes the default stack order match the legend."
Answer valid for older versions of ggplot:
Here is one approach, which calculates the midpoints of the bars.
library(ggplot2)
library(plyr)
# calculate midpoints of bars (simplified using comment by @DWin)
Data <- ddply(Data, .(Year...
MySQL IF NOT NULL, then display 1, else display 0
... above statement returns 0. Thus, you have to remember to explicitly check for NULL or empty string:
select if(name is null or name = '', 0, 1)
PS Eugen's example up above is correct, but I wanted to clarify this nuance as it caught me by surprise.
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