go

Development/go/time.md

@@ -0,0 +1,44 @@
+# [time](https://golang.org/pkg/time/)
+
+To parse string to time in golang, must define layout first.
+
+Read default layouts in [Constants](https://golang.org/pkg/time/#pkg-constants).
+
+The reference time:
+
+```txt
+Mon Jan 2 15:04:05 MST 2006
+```
+
+To define your layout, rewrite reference time in your layout.
+
+Example `Parse`:
+
+```go
+layout := "2006-01-02 15:04:05"
+
+t, err := time.Parse(layout, "2020-06-09 23:04:02")
+if err != nil {
+    log.Fatal(err)
+}
+
+fmt.Println(t)
+```
+
+Example `ParseInLocation`:
+
+```go
+layout := "2006-01-02 15:04:05"
+
+loc, err := time.LoadLocation("Asia/Ho_Chi_Minh")
+if err != nil {
+    log.Fatal(err)
+}
+
+t, err := time.ParseInLocation(layout, "2020-06-09 23:04:02", loc)
+if err != nil {
+    log.Fatal(err)
+}
+
+fmt.Println(t)
+```