IsBytes

IsBytes( value )
IsBytes( value )
IsBytes( value )
IsBytes( value )
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Description

The IsBytes function returns true only if value is a sequence of one or more Bytes, otherwise it returns false.

Parameters

Argument Type Definition and Requirements

value

Any

Any value, which is to be tested to determine whether it is a sequence of one or more bytes or not.

Returns

Returns a boolean, indicating whether value was a sequence of one or more bytes or not.

Examples

The following query uses Map to iterate over an array of all of the types of values that can be tested by a type-check function, passing each item into a Lambda function that returns an object, which contains the value and the result of calling IsBytes with that value:

result, err := client.Query(
  f.Map(
    f.Arr{
      f.Arr{"array"},
      true,
      false,
      f.BytesV{0x01, 0x02, 0x03, 0x04},
      f.Arr{0x1, 0x2, 0x3, 0x4},
      f.Collection("Letters"),
      f.Ref("credentials/self"),
      f.Database("child_db"),
      f.Date("2019-11-12"),
      f.RefCollection(f.Collection("Letters"), 123),
      10.1,
      f.Function("double"),
      f.Index("all_letters"),
      10,
      f.RefCollection(f.Keys(), "248967241620521472"),
      f.Query(f.Lambda("x", f.Var("x"))),
      nil,
      f.Null(),
      f.Obj{ "x": 10 },
      f.Role("employees"),
      f.Match(f.Index("all_letters")),
      "ten",
      "10",
      f.Now(),
      f.RefCollection(f.Tokens(), "249062079147803136"),
    },
    f.Lambda("x", f.Obj{
      "value": f.Var("x"),
      "IsBytes": f.IsBytes(f.Var("x")),
    })))

if (err != nil) {
  fmt.Println(err)
} else {
  fmt.Println(result)
}
System.out.println(
    client.query(
        Map(
            Arr(
                Arr(Value("array")),
                Value(true),
                Value(false),
                Value(new byte[] {0x1, 0x2, 0x3, 0x4}),
                Arr(Value(0x1), Value(0x2), Value(0x3), Value(0x4)),
                Collection("Letters"),
                Ref("credentials/self"),
                Database("child_db"),
                Date("2019-11-12"),
                Ref(Collection("Letters"), "123"),
                Value(10.1),
                Function("double"),
                Index("all_letters"),
                Value(10),
                Ref(Keys(), "248967241620521472"),
                Query(Lambda("x", Var("x"))),
                Null(),
                Obj("x", Value(10)),
                Role("employees"),
                Match(Index("all_letters")),
                Value("ten"),
                Value("10"),
                Now(),
                Ref(Tokens(), "249062079147803136")
            ),
            Lambda(
                "x",
                Obj("value", Var("x"), "IsBytes", IsBytes(Var("x")))
            )
        )
    ).get());
client.query(
  q.Map(
    [
      ['array'],
      true,
      false,
      new Uint8Array([1, 2, 3, 4]),
      [0x1, 0x2, 0x3, 0x4],
      q.Collection('Letters'),
      q.Ref('credentials/self'),
      q.Database('child_db'),
      q.Date('2019-11-12'),
      q.Ref(q.Collection('Letters'), 123),
      10.1,
      q.Function('double'),
      q.Index('all_letters'),
      10,
      q.Ref(q.Keys(), '248967241620521472'),
      q.Query(q.Lambda('x', q.Var('x'))),
      null,
      { x: 10 },
      q.Role('employees'),
      q.Match(q.Index('all_letters')),
      'ten',
      '10',
      q.Now(),
      q.Ref(q.Tokens(), '249062079147803136'),
    ],
    q.Lambda('x', {
      value: q.Var('x'),
      IsBytes: q.IsBytes(q.Var('x')),
    })
  )
)
.then((ret) => console.log(ret))
println(Await.result(
  client.query(
    Map(
      Arr(
        Arr("array"),
        true,
        false,
        BytesV(0x1, 0x2, 0x3, 0x4),
        Arr(0x1, 0x2, 0x3, 0x4),
        Collection("Letters"),
        Ref("credentials/self"),
        Database("child_db"),
        Date("2019-11-12"),
        Ref(Collection("Letters"), 123),
        10.1,
        Function("double"),
        Index("all_letters"),
        10,
        Ref(Keys(), "248967241620521472"),
        Query(Lambda("x", Var("x"))),
        Null,
        Obj("x" -> 10),
        Role("employees"),
        Match(Index("all_letters")),
        "ten",
        "10",
        Now(),
        Ref(Tokens(), "249062079147803136")
      ),
      Lambda(
        "x",
        Obj( "value" -> Var("x"), "IsBytes" -> IsBytes(Var("x")))
      )
    )
  ),
  5.seconds
))
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[map[IsBytes:false value:[array]] map[IsBytes:false value:true] map[IsBytes:false value:false] map[IsBytes:true value:[1 2 3 4]] map[IsBytes:false value:[1 2 3 4]] map[IsBytes:false value:{Letters 0xc000160390 0xc000160390 <nil>}] map[IsBytes:false value:{264354436692836874 0xc0001604b0 0xc0001604b0 <nil>}] map[IsBytes:false value:{child_db 0xc0001606f0 0xc0001606f0 <nil>}] map[IsBytes:false value:{0 63709113600 <nil>}] map[IsBytes:false value:{123 0xc000160900 0xc000160900 <nil>}] map[IsBytes:false value:10.1] map[IsBytes:false value:{double 0xc000160a50 0xc000160a50 <nil>}] map[IsBytes:false value:{all_letters 0xc000160b70 0xc000160b70 <nil>}] map[IsBytes:false value:10] map[IsBytes:false value:{248967241620521472 0xc000160cc0 0xc000160cc0 <nil>}] map[IsBytes:false value:{[123 34 108 97 109 98 100 97 34 58 34 120 34 44 34 101 120 112 114 34 58 123 34 118 97 114 34 58 34 120 34 125 125]}] map[IsBytes:false value:{}] map[IsBytes:false value:{}] map[IsBytes:false value:map[x:10]] map[IsBytes:false value:{employees 0xc000160ed0 0xc000160ed0 <nil>}] map[IsBytes:false value:{map[match:{all_letters 0xc000161020 0xc000161020 <nil>}]}] map[IsBytes:false value:ten] map[IsBytes:false value:10] map[IsBytes:false value:{462542000 63724302139 <nil>}] map[IsBytes:false value:{249062079147803136 0xc0001611d0 0xc0001611d0 <nil>}]]
[{value: ["array"], IsBytes: false},
 {value: true, IsBytes: false},
 {value: false, IsBytes: false},
 {value: [0x01 0x02 0x03 0x04], IsBytes: true},
 {value: [1, 2, 3, 4], IsBytes: false},
 {value: ref(id = "Letters", collection = ref(id = "collections")),
  IsBytes: false},
 {value: ref(id = "248967019900174848", collection = ref(id = "credentials")),
  IsBytes: false},
 {value: ref(id = "child_db", collection = ref(id = "databases")),
  IsBytes: false},
 {value: 2019-11-12, IsBytes: false},
 {value: ref(id = "123", collection = ref(id = "Letters", collection = ref(id = "collections"))),
  IsBytes: false},
 {value: 10.1, IsBytes: false},
 {value: ref(id = "double", collection = ref(id = "functions")),
  IsBytes: false},
 {value: ref(id = "all_letters", collection = ref(id = "indexes")),
  IsBytes: false},
 {value: 10, IsBytes: false},
 {value: ref(id = "248967241620521472", collection = ref(id = "keys")),
  IsBytes: false},
 {value: QueryV({lambda=x, expr={var=x}}), IsBytes: false},
 {value: null, IsBytes: false},
 {value: {x: 10}, IsBytes: false},
 {value: ref(id = "employees", collection = ref(id = "roles")),
  IsBytes: false},
 {value: {@set = {match: ref(id = "all_letters", collection = ref(id = "indexes"))}},
  IsBytes: false},
 {value: "ten", IsBytes: false},
 {value: "10", IsBytes: false},
 {value: 2019-11-12T13:15:16.789Z, IsBytes: false},
 {value: ref(id = "249062079147803136", collection = ref(id = "tokens")),
  IsBytes: false}]
[ { value: [ 'array' ], IsBytes: false },
  { value: true, IsBytes: false },
  { value: false, IsBytes: false },
  { value: Bytes("AQIDBA=="), IsBytes: true },
  { value: [ 1, 2, 3, 4 ], IsBytes: false },
  { value: Collection("Letters"), IsBytes: false },
  { value: Ref(Credentials(), "248967019900174848"),
    IsBytes: false },
  { value: Database("child_db"), IsBytes: false },
  { value: Date("2019-11-12"), IsBytes: false },
  { value: Ref(Collection("Letters"), "123"), IsBytes: false },
  { value: 10.1, IsBytes: false },
  { value: Function("double"), IsBytes: false },
  { value: Index("all_letters"), IsBytes: false },
  { value: 10, IsBytes: false },
  { value: Ref(Keys(), "248967241620521472"), IsBytes: false },
  { value: Query(Lambda("x", Var("x"))), IsBytes: false },
  { value: null, IsBytes: false },
  { value: { x: 10 }, IsBytes: false },
  { value: Role("employees"), IsBytes: false },
  { value: Match(Index("all_letters")), IsBytes: true },
  { value: 'ten', IsBytes: false },
  { value: '10', IsBytes: false },
  { value: Time("2019-11-12T13:15:16.789Z"), IsBytes: false },
  { value: Ref(Tokens(), "249062079147803136"), IsBytes: false } ]
[{value: ["array"], IsBytes: false},
 {value: true, IsBytes: false},
 {value: false, IsBytes: false},
 {value: [0x01 0x02 0x03 0x04], IsBytes: true},
 {value: [1, 2, 3, 4], IsBytes: false},
 {value: ref(id = "Letters", collection = ref(id = "collections")),
  IsBytes: false},
 {value: ref(id = "248967019900174848", collection = ref(id = "credentials")),
  IsBytes: false},
 {value: ref(id = "child_db", collection = ref(id = "databases")),
  IsBytes: false},
 {value: 2019-11-12, IsBytes: false},
 {value: ref(id = "123", collection = ref(id = "Letters", collection = ref(id = "collections"))),
  IsBytes: false},
 {value: 10.1, IsBytes: false},
 {value: ref(id = "double", collection = ref(id = "functions")),
  IsBytes: false},
 {value: ref(id = "all_letters", collection = ref(id = "indexes")),
  IsBytes: false},
 {value: 10, IsBytes: false},
 {value: ref(id = "248967241620521472", collection = ref(id = "keys")),
  IsBytes: false},
 {value: {lambda: "x", expr: {var: "x"}}, IsBytes: false},
 {value: NullV, IsBytes: false},
 {value: {x: 10}, IsBytes: false},
 {value: ref(id = "employees", collection = ref(id = "roles")),
  IsBytes: false},
 {value: {@set = {match: ref(id = "all_letters", collection = ref(id = "indexes"))}},
  IsBytes: false},
 {value: "ten", IsBytes: false},
 {value: "10", IsBytes: false},
 {value: 2019-11-12T13:15:16.789Z, IsBytes: false},
 {value: ref(id = "249062079147803136", collection = ref(id = "tokens")),
  IsBytes: false}]

This query operates on a pre-existing schema, which is not provided here.

Also, the query is executed via a client connection, that uses a secret acquired by calling Login (not shown here), so that Ref("credentials/self") returns a valid value.

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