In Go language, lambda expression parameter passing uses arrow syntax (=>) to specify parameter types and return types, allowing lambda expressions to be passed as parameters to other functions. This approach simplifies the code and eliminates the need to create named functions. For example: func multiply(fn func(int) int, x int) int { return fn(x); }
Go language function Lambda parameter passing
Lambda expressions are syntactic sugar that simplifies function creation, allowing functions to be defined without creating a named function. In the Go language, Lambda expressions are defined using the func
keyword, as follows:
func(x int) int { return x * x }
Parameter passing
When passing a Lambda expression as When passing parameters to other functions, you need to use arrow syntax (=>
) to specify the parameter type and return type. For example:
func multiply(fn func(int) int, x int) int { return fn(x) }
In this example, the multiply
function accepts two parameters: a Lambda expression fn
and an integer x
. The multiply
function passes x
as a parameter to the Lambda expression fn
and returns the result.
Practical case
The following is a practical case using Lambda parameter passing:
package main import "fmt" func main() { // 创建一个 Lambda 表达式来计算平方 square := func(x int) int { return x * x } // 使用 Lambda 表达式作为参数调用 multiply 函数 result := multiply(square, 5) // 输出结果 fmt.Println(result) // 输出: 25 }
In this case, square
A Lambda expression calculates the square of an integer, while the multiply
function uses the square
Lambda expression to calculate the square of 5.
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