讓go解題更好寫

package: go-solve-kit
created_at: 2021/08/11 00:00:00
link: https://github.com/LaiJunBin/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
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