Go-Solve-Kit

Designed specifically for programming problem solving.

It's like VB LINQ, JavaScript array Function ... more.

Install

$ go get github.com/laijunbin/go-solve-kit

Import

import (
	sk "github.com/laijunbin/go-solve-kit"
)

Example

---

Example 1: two number sum.

func main() {
	sum := sk.LineInput().Split(" ")[:2].ToIntArray().Sum()
	fmt.Println(sum)
}

---

Example 2:

func main() {
	nums := []int {1, 2, 3, 4, 5}
	output := sk.FromIntArray(nums).Map(func(v sk.Int, _ int) interface{} {
		return v * v
	}).Filter(func(v sk.Type, _ int) bool {
		return v.ToInt() % 2 == 0
	}).ToStringArray().Join("\n")
	fmt.Println(output)
}

Output:

4
16

---

Example 3:

func main() {
	array2D := sk.NewArray(5).Map(func(_ sk.Type, i int) interface{} {
		return sk.NewRange(1, 5, 2).Map(func(v sk.Int, j int) interface{} {
			return v.ValueOf() * i
		})
	})
	fmt.Println(array2D)
	fmt.Println(array2D.Get(2, 2).ToInt())
	fmt.Println(array2D.Get(4, 1).ToInt())
	fmt.Println("-------------------")
	fmt.Println(array2D)
	fmt.Println(array2D.Length())
	fmt.Println(array2D.Flatten())
	fmt.Println(array2D.Flatten().Length())
}

Output:

[{[{0} {0} {0}]} {[{1} {3} {5}]} {[{2} {6} {10}]} {[{3} {9} {15}]} {[{4} {12} {20}]}]
10
12
-------------------
[{[{0} {0} {0}]} {[{1} {3} {5}]} {[{2} {6} {10}]} {[{3} {9} {15}]} {[{4} {12} {20}]}]
5
[{0} {0} {0} {1} {3} {5} {2} {6} {10} {3} {9} {15} {4} {12} {20}]
15

Docs

Types

Type	Description
Int	A wrapper of int.
String	A wrapper of string.
Type	A wrapper of any type.
IntArray	A Int array.
StringArray	A String array.
TypeArray	A Type array.

---

Common Method

Method	Return Type	Description
NewType(v interface{})	Type	New a type from interface.
NewArray(size int)	TypeArray	New empty array.
NewRange(start, end, step int)	IntArray	Generate a range IntArray.
FromIntArray(items []int)	IntArray	From []int create IntArray.
FromStringArray(items []string)	StringArray	From []string create StringArray.
FromInterfaceArray(items interface{})	TypeArray	From array of interface{} create TypeArray.
LineInput()	String	Read a line of standard input.
If(boolVar bool, trueVal, falseVal interface{})	interface {}	If boolVar is true, return trueVal, otherwise return falseVal.

Basic Type

Int

Method	Return Type	Description
ValueOf()	int	Get int value.
ToString()	String	To String type.

String

Method	Return Type	Description
ValueOf()	string	Get string value.
ToInt()	Int	To Int type.
Split(sep string)	StringArray	Separated by sep.
Length()	Int	Get string length.
Trim(cutset string)	String	A wrapper of strings.Trim()
TrimSpace()	String	A wrapper of strings.TrimSpace()
TrimLeft(prefix string)	String	A wrapper of strings.TrimPrefix()
TrimRight(suffix string)	String	A wrapper of strings.TrimSuffix()
IndexOf(v string)	Int	A wrapper of strings.Index()
Contains(v string)	bool	A wrapper of strings.Contains()
ToLower()	String	A wrapper of strings.ToLower()
ToUpper()	String	A wrapper of strings.ToUpper()

Type

Method	Return Type	Description
ValueOf()	interface{}	Get interface{} value.
ToString()	String	To String type.
ToInt()	Int	To Int type.
ToArray()	TypeArray	To TypeArray type. (if fails, return an empty TypeArray)
ToStringArray()	StringArray	To StringArray type. (if fails, return an empty StringArray)
ToIntArray()	IntArray	To IntArray type. (if fails, return an empty IntArray)

---

Array Type

IntArray

Method	Return Type	Description
Length()	Int	Get array length.
Map(lambda func(v Int, i int) interface{})	TypeArray	Same as javascript array.map() or vb LINQ Select().
ForEach(lambda func(v Int, i int))	void	Same as javascript array.forEach().
Filter(lambda func(v Int, i int) bool)	IntArray	Same as javascript array.filter() or vb LINQ FindAll().
ToStringArray()	StringArray	To StringArray.
ToTypeArray()	TypeArray	To TypeArray.
Sum()	Int	Get the sum of the array.
Fill(v Int)	IntArray	Same as javascript array.fill().
Every(lambda func(v Int, i int) bool)	bool	Same as javascript array.every().
Some(lambda func(v Int, i int) bool)	bool	Same as javascript array.some().
Contains(v int)	bool	Same as javascript array.includes() or vb collection type Contains().
FindIndex(lambda func(v Int, i int) bool)	Int	Same as javascript array.findIndex().
IndexOf(v int)	Int	Same as javascript array.indexOf() or vb collection type IndexOf().
Append(v int)	void	Append the item to last.
Pop()	Int	Get last item and remove.
Enqueue(v int)	void	Append the item to first.
Dequeue()	Int	Get first item and remove.
Remove(v int)	void	Remove first match item.
First()	Int	Get first item.
Last()	Int	Get last item.
Sort()	void	Sort by increment.
SortBy(lambda func(x, y Int))	void	Sort by customize.
Copy()	IntArray	Copy array.
Slice(start, end int)	IntArray	Similar to javascript array.slice(), but when end = 0, it is equal to array.length

StringArray

Method	Return Type	Description
Length()	Int	Get array length.
Map(lambda func(s String, i int) interface{})	TypeArray	Same as javascript array.map() or vb LINQ Select().
ForEach(lambda func(v String, i int))	void	Same as javascript array.forEach().
Filter(lambda func(s String, i int) bool)	StringArray	Same as javascript array.filter() or vb LINQ FindAll().
ToIntArray()	IntArray	To IntArray.
ToTypeArray()	TypeArray	To TypeArray.
Join(sep string)	String	Same as javascript array.join().
Fill(v String)	StringArray	Same as javascript array.fill().
Every(lambda func(v String, i int) bool)	bool	Same as javascript array.every().
Some(lambda func(v String, i int) bool)	bool	Same as javascript array.some().
Contains(v string)	bool	Same as javascript array.includes() or vb collection type Contains().
FindIndex(lambda func(v String, i int) bool)	Int	Same as javascript array.findIndex().
IndexOf(v string)	Int	Same as javascript array.indexOf() or vb collection type IndexOf().
Append(v string)	void	Append the item to last.
Pop()	String	Get last item and remove.
Enqueue(v string)	void	Append the item to first.
Dequeue()	String	Get first item and remove.
Remove(v string)	void	Remove first match item.
First()	String	Get first item.
Last()	String	Get last item.
Sort()	void	Sort by increment.
SortBy(lambda func(x, y String))	void	Sort by customize.
Copy()	StringArray	Copy array.
Slice(start, end int)	StringArray	Similar to javascript array.slice(), but when end = 0, it is equal to array.length

TypeArray

Method	Return Type	Description
Length()	Int	Get array length.
ToStringArray()	StringArray	To StringArray.
ToIntArray()	IntArray	To IntArray.
Map(lambda func(s Type, i int) interface{})	TypeArray	Same as javascript array.map() or vb LINQ Select().
ForEach(lambda func(v Type, i int))	void	Same as javascript array.forEach().
Filter(lambda func(s Type, i int) bool)	TypeArray	Same as javascript array.filter() or vb LINQ FindAll().
Fill(v interface{})	TypeArray	Same as javascript array.fill().
Every(lambda func(v Type, i int) bool)	bool	Same as javascript array.every().
Some(lambda func(v Type, i int) bool)	bool	Same as javascript array.some().
FindIndex(lambda func(v Type, i int) bool)	Int	Same as javascript array.findIndex().
Sort(lambda func(x, y Type))	void	Sort by customize.
Get(indexes ...int)	Type	Get item by indexes.
Flatten()	TypeArray	Same as javascript array.flat().
Copy()	TypeArray	Copy array.
Slice(start, end int)	TypeArray	Similar to javascript array.slice(), but when end = 0, it is equal to array.length