Concat

This reference topic applies to FQL v4. Go to this page for the latest FQL v10 reference topics.

 
Concat( value, [ separator ] )
concat( value, [ separator ] )
Concat( value, [ separator ] )
Concat( value, [ separator ] )
Concat( value, [ separator ] )
Concat( value, [ separator ] )

Description

The Concat function returns a string which has joined a list of strings into a single string.

Parameters

Parameter Type Definition and Requirements

value

Array of Strings

An array of strings to join.

separator

String

Optional - This value is placed between each joined string. Default is an empty string ("").

Returns

A string value.

Examples

The following query takes an array of Strings containing "Hen" and "Wen" as its first argument and a separator of a space (" ") as its second argument. The result of the Concat operation is "Hen Wen".

client.query(
  q.Concat(['Hen', 'Wen'], ' ')
)
.then((ret) => console.log(ret))
.catch((err) => console.error(
  'Error: [%s] %s: %s',
  err.name,
  err.message,
  err.errors()[0].description,
))
Hen Wen
result = client.query(
    q.concat(["Hen", "Wen"], " ")
)
print(result)
Hen Wen
result, err := client.Query(
	f.Concat(f.Arr{"Hen", "Wen"}, f.Separator(" ")))

if err != nil {
	fmt.Fprintln(os.Stderr, err)
} else {
	fmt.Println(result)
}
Hen Wen
try
{
    Value result = await client.Query(
        Concat(Arr("Hen", "Wen"), " ")
    );
    Console.WriteLine(result);
}
catch (Exception e)
{
    Console.WriteLine($"ERROR: {e.Message}");
}
StringV(Hen Wen)
System.out.println(
    client.query(
        Concat(Arr(Value("Hen"), Value("Wen")), Value(" "))
    ).get());
"Hen Wen"
Concat(['Hen', 'Wen'], ' ')
'Hen Wen'
Query metrics:

  •    bytesIn:  40

  •   bytesOut:  22

  • computeOps:   1

  •    readOps:   0

  •   writeOps:   0

  •  readBytes:   0

  • writeBytes:   0

  •  queryTime: 5ms

  •    retries:   0

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