// Small demo of the common functions in the bag package.
func Example_usage() {
// Create a new bag with some integers in it
b := bag.New()
for i := 0; i < 10; i++ {
b.Insert(i)
}
b.Insert(8)
// Remove every odd integer
for i := 1; i < 10; i += 2 {
b.Remove(i)
}
// Print the element count of all numbers
for i := 0; i < 10; i++ {
fmt.Printf("#%d: %d\n", i, b.Count(i))
}
// Calculate the sum with a Do iteration
sum := 0
b.Do(func(val interface{}) {
sum += val.(int)
})
fmt.Println("Sum:", sum)
// Output:
// #0: 1
// #1: 0
// #2: 1
// #3: 0
// #4: 1
// #5: 0
// #6: 1
// #7: 0
// #8: 2
// #9: 0
// Sum: 28
}
// Creates a new derived utility based on two existing ones.
func newComboUtility(combinator Combinator) *comboUtility {
return &comboUtility{
combinator: combinator,
children: bag.New(),
reset: true,
}
}
// Creates a new data source utility and associated a transformation curve.
func newInputSetUtility(curve Curve, nonZero bool) *inputSetUtility {
return &inputSetUtility{
curve: curve,
nonZero: nonZero,
members: make(map[int]*inputUtility),
deps: bag.New(),
}
}
// Creates a new data source utility and associated a transformation curve.
func newInputUtility(curve Curve, nonZero bool) *inputUtility {
return &inputUtility{
curve: curve,
nonZero: nonZero,
children: bag.New(),
reset: true,
}
}
// Creates a new derived utility set based on two existing ones.
func newComboSetUtility(combinator Combinator, srcA, srcB utility) *comboSetUtility {
return &comboSetUtility{
combinator: combinator,
srcA: srcA,
srcB: srcB,
members: make(map[int]*comboUtility),
deps: bag.New(),
}
}
// Creates a new undirected graph.
func New(vertices int) *Graph {
g := &Graph{
nodes: vertices,
infos: make(map[int]interface{}),
edges: make([]*bag.Bag, vertices),
}
for i := 0; i < vertices; i++ {
g.edges[i] = bag.New()
}
return g
}