# Encoding

The functions for converting data from one format to another are described here.

* [Json( obj o ) str](/stdlib/encoding.md#json-obj-o-str)
* [JsonToObj( str s ) obj](/stdlib/encoding.md#jsontoobj-str-s-obj)
* [StructDecode( b buf, struct s )](/stdlib/encoding.md#structdecode-buf-b-struct-s)
* [StructEncode( struct s ) buf](/stdlib/encoding.md#structencode-struct-s-buf)

## Functions

### Json( obj o ) str

The *Json* function converts a variable of *obj* type into **json** string.

### JsonToObj( str s ) obj

The *JsonToObj* function converts **json** string into a variable of the *obj* type.

```go
run str {
  return Json(JsonToObj(`{
         "int": 1234,
         "str": "value",
         "float": -45.67,
          "list":[{"on": true},
            "sub 2",
            "sub 3",
            {
                "q": "OK"
            }]
    }`))
}
// Result {"float":-45.67,"int":1234,"list":[{"on":true},"sub 2","sub 3",{"q":"OK"}],"str":"value"}
```

### StructDecode( buf b, struct s )

The *StructDecode* function converts the binary data of a *buf* variable to the field values of the specified structure variable. The binary data must be created with *StructEncode* function.

```go
  time t
  StructDecode(StructEncode(Now()), t)
```

### StructEncode( struct s ) buf

The *StructEncode* function converts a structure variable to binary and stores the result into a *buf* variable. The function saves only fields of the following types: **int, bool, char, float, buf, str**. Fields of other types are skipped.

```go
struct tmp {
    str head
    int i
}

run str {
  tmp t1 = {head: `HEADER`, i: -356}
  buf bout = StructEncode(t1)
  ...
}
```


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