mirror of
https://github.com/teivah/100-go-mistakes.git
synced 2026-06-22 01:17:11 +08:00
55 lines
728 B
Go
55 lines
728 B
Go
package main
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import (
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"io"
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)
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type LowerCaseReader struct {
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reader io.Reader
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}
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func (l LowerCaseReader) Read(p []byte) (int, error) {
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return 0, nil
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}
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func foo1(r io.Reader) error {
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b, err := io.ReadAll(r)
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if err != nil {
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return err
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}
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// ...
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_ = b
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return nil
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}
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func foo2(r io.Reader) error {
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b, err := readAll(r, 3)
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if err != nil {
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return err
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}
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// ...
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_ = b
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return nil
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}
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func readAll(r io.Reader, retries int) ([]byte, error) {
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b := make([]byte, 0, 512)
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for {
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if len(b) == cap(b) {
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b = append(b, 0)[:len(b)]
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}
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n, err := r.Read(b[len(b):cap(b)])
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b = b[:len(b)+n]
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if err != nil {
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if err == io.EOF {
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return b, nil
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}
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retries--
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if retries < 0 {
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return b, err
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}
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}
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}
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}
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