Qiang Li questions

• why doesn't this ReplaceAll work in mathematica
• how to generate a plot of planar Cantor set in mathematica
• Do operations for the second component of each element in a list in Mathematica
• how to animate 3d plot given a rotation axis in mathematics
• two list operations in mathematica
• sorting with changes to the other part in mathematica
• is mathematica able to do some planar geometry plotting
• Why does @array ~~ LIST return false even though @array contains the same elements as LIST?
• open same project in both webstorm and intellij and prevent asking "project file changed" window
• SBT plugin dependency resolution fails with com.typesafe.play#sbt-plugin;2.2.1: not found

Qiang Li answers