IsDouble
Not available in this language yet.IsDouble( value )IsDouble( value )IsDouble( value )Not available in this language yet.IsDouble( value )Description
The IsDouble function returns true only if value is a
double-precision, floating-point number, otherwise it returns false.
Parameters
| Argument | Type | Definition and Requirements |
|---|---|---|
|
Any |
Any value, which is to be tested to determine whether it is a double-precision, floating-point number or not. |
Returns
Returns a boolean, indicating whether value was a double-precision,
floating-point number 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 IsDouble
with that value:
Not available in this language yet.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"),
"IsDouble": f.IsDouble(f.Var("x")),
})))
if (err != nil) {
fmt.Println(err)
} else {
fmt.Println(result)
}[map[IsDouble:false value:[array]] map[IsDouble:false value:true] map[IsDouble:false value:false] map[IsDouble:false value:[1 2 3 4]] map[IsDouble:false value:[1 2 3 4]] map[IsDouble:false value:{Letters 0xc00008eed0 0xc00008eed0 <nil>}] map[IsDouble:false value:{264354436692836874 0xc00008f380 0xc00008f380 <nil>}] map[IsDouble:false value:{child_db 0xc00008f500 0xc00008f500 <nil>}] map[IsDouble:false value:{0 63709113600 <nil>}] map[IsDouble:false value:{123 0xc00008f710 0xc00008f710 <nil>}] map[IsDouble:true value:10.1] map[IsDouble:false value:{double 0xc00008f860 0xc00008f860 <nil>}] map[IsDouble:false value:{all_letters 0xc00008f980 0xc00008f980 <nil>}] map[IsDouble:false value:10] map[IsDouble:false value:{248967241620521472 0xc00008fad0 0xc00008fad0 <nil>}] map[IsDouble: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[IsDouble:false value:{}] map[IsDouble:false value:{}] map[IsDouble:false value:map[x:10]] map[IsDouble:false value:{employees 0xc00008fce0 0xc00008fce0 <nil>}] map[IsDouble:false value:{map[match:{all_letters 0xc00008fe30 0xc00008fe30 <nil>}]}] map[IsDouble:false value:ten] map[IsDouble:false value:10] map[IsDouble:false value:{338887000 63724302314 <nil>}] map[IsDouble:false value:{249062079147803136 0xc0002f4000 0xc0002f4000 <nil>}]]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"), "IsDouble", IsDouble(Var("x")))
)
)
).get());[{value: ["array"], IsDouble: false},
{value: true, IsDouble: false},
{value: false, IsDouble: false},
{value: [0x01 0x02 0x03 0x04], IsDouble: false},
{value: [1, 2, 3, 4], IsDouble: false},
{value: ref(id = "Letters", collection = ref(id = "collections")),
IsDouble: false},
{value: ref(id = "248967019900174848", collection = ref(id = "credentials")),
IsDouble: false},
{value: ref(id = "child_db", collection = ref(id = "databases")),
IsDouble: false},
{value: 2019-11-12, IsDouble: false},
{value: ref(id = "123", collection = ref(id = "Letters", collection = ref(id = "collections"))),
IsDouble: false},
{value: 10.1, IsDouble: true},
{value: ref(id = "double", collection = ref(id = "functions")),
IsDouble: false},
{value: ref(id = "all_letters", collection = ref(id = "indexes")),
IsDouble: false},
{value: 10, IsDouble: false},
{value: ref(id = "248967241620521472", collection = ref(id = "keys")),
IsDouble: false},
{value: QueryV({lambda=x, expr={var=x}}), IsDouble: false},
{value: null, IsDouble: false},
{value: {x: 10}, IsDouble: false},
{value: ref(id = "employees", collection = ref(id = "roles")),
IsDouble: false},
{value: {@set = {match: ref(id = "all_letters", collection = ref(id = "indexes"))}},
IsDouble: false},
{value: "ten", IsDouble: false},
{value: "10", IsDouble: false},
{value: 2019-11-12T13:15:16.789Z, IsDouble: false},
{value: ref(id = "249062079147803136", collection = ref(id = "tokens")),
IsDouble: false}]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'),
IsDouble: q.IsDouble(q.Var('x')),
})
)
)
.then((ret) => console.log(ret))[ { value: [ 'array' ], IsDouble: false },
{ value: true, IsDouble: false },
{ value: false, IsDouble: false },
{ value: Bytes("AQIDBA=="), IsDouble: false },
{ value: [ 1, 2, 3, 4 ], IsDouble: false },
{ value: Collection("Letters"), IsDouble: false },
{ value: Ref(Credentials(), "248967019900174848"),
IsDouble: false },
{ value: Database("child_db"), IsDouble: false },
{ value: Date("2019-11-12"), IsDouble: false },
{ value: Ref(Collection("Letters"), "123"), IsDouble: false },
{ value: 10.1, IsDouble: true },
{ value: Function("double"), IsDouble: false },
{ value: Index("all_letters"), IsDouble: false },
{ value: 10, IsDouble: false },
{ value: Ref(Keys(), "248967241620521472"), IsDouble: false },
{ value: Query(Lambda("x", Var("x"))), IsDouble: false },
{ value: null, IsDouble: false },
{ value: { x: 10 }, IsDouble: false },
{ value: Role("employees"), IsDouble: false },
{ value: Match(Index("all_letters")), IsDouble: false },
{ value: 'ten', IsDouble: false },
{ value: '10', IsDouble: false },
{ value: Time("2019-11-12T13:15:16.789Z"), IsDouble: false },
{ value: Ref(Tokens(), "249062079147803136"), IsDouble: false } ]Not available in this language yet.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"), "IsDouble" -> IsDouble(Var("x")))
)
)
),
5.seconds
))[{value: ["array"], IsDouble: false},
{value: true, IsDouble: false},
{value: false, IsDouble: false},
{value: [0x01 0x02 0x03 0x04], IsDouble: false},
{value: [1, 2, 3, 4], IsDouble: false},
{value: ref(id = "Letters", collection = ref(id = "collections")),
IsDouble: false},
{value: ref(id = "248967019900174848", collection = ref(id = "credentials")),
IsDouble: false},
{value: ref(id = "child_db", collection = ref(id = "databases")),
IsDouble: false},
{value: 2019-11-12, IsDouble: false},
{value: ref(id = "123", collection = ref(id = "Letters", collection = ref(id = "collections"))),
IsDouble: false},
{value: 10.1, IsDouble: true},
{value: ref(id = "double", collection = ref(id = "functions")),
IsDouble: false},
{value: ref(id = "all_letters", collection = ref(id = "indexes")),
IsDouble: false},
{value: 10, IsDouble: false},
{value: ref(id = "248967241620521472", collection = ref(id = "keys")),
IsDouble: false},
{value: {lambda: "x", expr: {var: "x"}}, IsDouble: false},
{value: NullV, IsDouble: false},
{value: {x: 10}, IsDouble: false},
{value: ref(id = "employees", collection = ref(id = "roles")),
IsDouble: false},
{value: {@set = {match: ref(id = "all_letters", collection = ref(id = "indexes"))}},
IsDouble: false},
{value: "ten", IsDouble: false},
{value: "10", IsDouble: false},
{value: 2019-11-12T13:15:16.789Z, IsDouble: false},
{value: ref(id = "249062079147803136", collection = ref(id = "tokens")),
IsDouble: 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
|
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