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Contents
/**
* Here is an example solution for the Triangle exercise
*/
component {
function equilateral( array sides ) {
// Is triangle and all 3 sides the same
return isTriangle( sides ) && countSides( sides ) == 1;
}
function isosceles( array sides ) {
// Is triangle and at least two sides the same
return isTriangle( sides ) && countSides( sides ) < 3;
}
function scalene( array sides ) {
// Is triangle and all 3 sides different
return isTriangle( sides ) && countSides( sides ) == 3;
}
private function countSides( array sides ) {
var distinctSides = {};
// Keep track of distinct sides
sides.each( function( side ){
distinctSides[ side ] = true;
} );
// Count 'em up
return distinctSides.count();
}
private function isTriangle( array sides ) {
// Any sides of 0 are invalid
if( sides[ 1 ] == 0 || sides[ 2 ] == 0 || sides[ 3 ] == 0 ) {
return false;
}
// sides 1 and 2 must be at least the size of side 3
if( sides[ 1 ] + sides[ 2 ] < sides[ 3 ] ) {
return false;
}
// sides 1 and 3 must be at least the size of side 2
if( sides[ 1 ] + sides[ 3 ] < sides[ 2 ] ) {
return false;
}
// sides 2 and 3 must be at least the size of side 1
if( sides[ 2 ] + sides[ 3 ] < sides[ 1 ] ) {
return false;
}
// If we made it here, it's a triangle!
return true;
}
}
Version data entries
146 entries across 145 versions & 1 rubygems