ocomfd questions

• For a positive integer n, is Math.random()*n >= n possible?
• Why is (function(){return this}).bind('abc')()==='abc' equals to false?
• How to eliminate if-else when doing different things according to different combinations of boolean value?
• Why is let=0 valid but not var=0? [duplicate]
• Why does 0.-5 evaluate to -5?

ocomfd answers