siame questions

siame answers

• What does absolute sign mean in Ruby?
• Alternatives to RMagick/ImageMagick for reading image pixel by pixel
• Ruby open returning a string instead of a file?
• Read input from console in Ruby?
• How to get the quota of a directory for HDFS
• What is the equivalent of the collection.getIndexes() shell command in pymongo?
• What's the difference between to_a and to_ary?