# 
## Golang `strings.FieldFunc()` function

In Golang, the `FieldsFunc()` function is a built-in function of the strings package. It splits a string into slices of substrings based on the given function.

## Syntax
```
func FieldsFunc(str string, f func(rune) bool) []string
```
## Parameters
- **`str`** is the given string.
- **`f`** is a function that checks all Unicode characters.

## Return type
The return type of this function is a `string`.

## Return value
The `FieldsFunc()` function returns a slice of substrings if the condition is satisfied. 

> **Note**: If the string is empty it returns an empty slice.
 


## Code
The following code shows how to use the `FieldsFunc()` function:

> **Note**: To access the string package's functions, you must import the `string` and `Unicode` packages into your program.

```
package main
  
import (
    "fmt"
    "strings"
    "unicode"
)
  
```


// Golang program
// demostrating how to use strings.FieldsFunc() Function
  
package main
  
import (
    "fmt"
    "strings"
    "unicode"
)
  
func main() {

    myFunc := func(c rune) bool {
        return unicode.IsNumber(c)
    }
  
    // When a number is encountered, 
    // the FieldsFunc() method separates the string 
    // and returns all non-numbers.
    fmt.Printf("The Fields are: %q\n", 
       strings.FieldsFunc("This018is92a6shot179on89Golang864string34FieldFunc", myFunc))
}

## Code explanation

- Line 5: We add the `main` package.

- Lines 7 to 11: We import the necessary packages in the Golang project.

- Lines 13 to 24: We define the `main()` function. In the main, we create a function to find if the value is a number and the return value is assigned to the variable `myFunc`. Next, we pass the variable in the `strings.FieldsFunc()` function, which separates the string and returns all non-numbers when a number is encountered.


How to use strings.FieldsFunc() in Golang

FieldsFunc() in Golang splits strings into slices based on a custom function, returning non-empty slices. Import strings and Unicode packages to access this function.

How to use strings.FieldsFunc() in Golang

Golang strings.FieldFunc() function

Syntax

Parameters

Return type

Return value

Code

Code explanation

Golang `strings.FieldFunc()` function