Utilities for Golang

A set of utilities functions for Golang.

PLEASE NOTE: This package is working with Go 1.18 and later versions.

• Installation
• Getting Started
  • Handle Pointers
  • Conditional Expression
• Available Utilities
  • Conditional
  • Map Manipulation
  • Type
  • Pointer and Value
• License

Installation

You can install this package with go get command:

go get -u github.com/ghosind/utils

Getting Started

Handle Pointers

With the Pointer method, you can easy to get a pointer that points to any value you want.

str := "Hello world" // string
// get the pointer of the string, it equal to strp := &str
strp := utils.Pointer(str) // string pointer, and it point to str
log.Print(*strp) // Hello world

// It's also working for literal values
intp := utils.Pointer(1)
// You can't do:
// intp := &1
log.Print(*intp) // 1

You can also use Value or ValueWithDefault to get the value of the pointer. For nil pointer, Value method will return the zero value of the type, and ValueWithDefault method will return the default value you set.

utils.Value(strp) // Hello world
utils.ValueWithDefault(str, "Default") // Hello world

strp = nil
utils.Value(strp) // "" (empty string)
utils.ValueWithDefault(str, "Default") // Default

Conditional Expression

Golang does not provided ternary operator (?:), but you can use utils.Conditional or utils.ConditionalExpr to make it like a ternary expression.

a := 1
b := 2
bigger := utils.Conditional(a > b, a, b) // a > b ? a : b
// bigger: 2

Available Utilities

Conditional

• Conditional: An alternative of ternary operator, same of cond ? trueExpr : falseExpr.

• ConditionalExpr: An alternative to the conditional (ternary) operator (?:), it'll run expression by the conditional result.

• Max: Gets the maximum value between the two values.

• MaxN: Returns the maximum value in the list and returns the zero value of the type if no parameter.

• Min: Gets the minimum value between the two values.

• MinN: Returns the minimum value in the list and returns the zero value of the type if no parameter.

Error Handling

• Try: Recoverable function container.

• TryCatch: An alternative of try...catch...finally statement.

Math

• Matrix: Creates and initializes a n*m matrix.

Map Manipulation

• CloneMap: Creates a new map, and copies all the keys and their value from the source map.

• CopyMap: Copies all keys and their value from the source map into the destination map.

Type

• IsComparableType: Check the type of value is comparable or not.

• IsSameType: Compares two values' type.

• IsSameRawType: Compares two values' type without pointer.

• TypeOf: Gets the type of the value represented in string.

• RawTypeOf: Gets the type string name without pointer.

• GetElem: Gets element without pointer.

Pointer and Value

• Pointer: Gets the pointer of a value.

• PointerWithDefault: Gets the pointer if it is not nil, or the default pointer.

• Value: Gets the value of a pointer, or the zero value of the type if the pointer is nil.

• ValueWithDefault: Gets the value of a pointer, or the default value if the pointer is nil.

• PointerSlice: Converts a slice to a pointer slice.

• ValueSlice: Converts a pointer slice to a slice.

• PointerMap: Converts a map to a pointer map.

• ValueMap: Converts a pointer map to a map.

License

Distributed under the MIT License. See LICENSE file for more information.