105 lines
1.8 KiB
Markdown
105 lines
1.8 KiB
Markdown
# lambda
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package lambda provides tools for performing operations on generic array types
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features:
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features:
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- Map [T] -> [T]
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- MapV [T] -> [V]
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- MapError [T] -> ([T], [error]
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- MapErrorV [T] -> ([V], [error]
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- Foldr [T] -> T
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- Foldl [T] -> T
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- Entries map[K]V -> ([K], [V])
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- Flatten [[T]] -> [T]
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- Merge ([T], [T]) -> [T]
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- Split ([T], int) -> [[T]]
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todo:
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- idk
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example: adding some numbers
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```
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package main
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import (
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"log"
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"git.tuxpa.in/a/lambda"
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)
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func main(){
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arr := []int{1, 2, 3, 4, 6, 5}
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ans := lambda.Map(arr, func(x int) int { return x + 4 })
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// ans = []int{5, 6, 7, 8, 10, 9}
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log.Println(ans)
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}
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```
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## parallel
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subpackage parallel provides parallelized operations on generic array types
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features:
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- Map [T] -> [T]
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- MapV [T] -> [V]
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- MapError [T] -> ([T], [error]
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- MapErrorV [T] -> ([V], [error]
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todo:
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- idk
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example usage:
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making a request
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```
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package main
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import (
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"encoding/json"
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"fmt"
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"log"
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"net/http"
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"git.tuxpa.in/a/lambda/parallel"
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)
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type someResult struct {
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Title string `json:"title"`
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Id int `json:"id"`
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}
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func main() {
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var requests = make([]*http.Request, 20)
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for i := range requests {
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r, _ := http.NewRequest("GET", fmt.Sprintf("https://jsonplaceholder.typicode.com/todos/%d", i), nil)
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requests[i] = r
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}
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results, errs := parallel.MapErrorV(requests, func(r *http.Request) (*someResult, error) {
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out := &someResult{}
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res, err := http.DefaultClient.Do(r)
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if err != nil {
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return nil, err
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}
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defer res.Body.Close()
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err = json.NewDecoder(res.Body).Decode(out)
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return out, err
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}, 4)
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for i, v := range results {
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if errs[i] != nil {
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log.Printf("err: %s", errs[i])
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} else {
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log.Printf("result: %+v", v)
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}
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}
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}
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```
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