Type Conversion Functions

Function

Description

Result Type

Backend Support

Frontend Support

boolean(Object value)

Converts argument to a Boolean.

Boolean

Yes

Yes

byteAt(DataBlock data, Integer index)

Returns the integer value of the byte at the specified index in the data Data Block.

Integer

Yes

No

bytes(DataBlock data, Integer beginIndex [, Integer endIndex])

Returns a new Data Block that is a sub-block of the data Data Block, starting from beginIndex and ending at endIndex.

Data Block

Yes

No

charAt(String data, Integer index)

Returns the integer value of the character at the specified index in the data String.

Integer

Yes

No

copyBytes(DataBlock source, Integer sourceIndex, DataBlock target, Integer targetIndex, Integer length)

Copies a range of bytes from the source Data Block to the target Data Block. The copy starts at sourceIndex in the source and targetIndex in the target, copying length bytes. This function modifies the target Data Block and updates its internal state accordingly.

Data Block

Yes

No

double(Object value)

Converts argument to a Double number.

Double

Yes

Yes

integer(Object value [, Integer radix])

Converts argument to an Integer number.

If a radix is specified, this function converts value to a string and parses it as a signed integer in this radix. In this case characters in the string must all be digits of the specified radix, except that the first character may be an ASCII minus sign ('-') to indicate a negative value.

Integer

Yes

Yes

float(Object value)

Converts argument to a Float number.

Float

Yes

Yes

long(Object value [, Integer radix])

Converts argument to a Long number.

If a radix is specified, this function converts value to a string and parses it as a signed long in this radix. In this case characters in the string must all be digits of the specified radix, except that the first character may be an ASCII minus sign ('-') to indicate a negative value.

Long

Yes

Yes

string(Object value [, String charset])

Converts value argument to a String.

To convert a Data Block value to a String, use the optional argument charset to specify the character set encoding of the Data Block. Supported character sets are listed in the appendix. The default value of charset is UTF-8.

String

Yes

Yes

timestamp(Object value)

Converts argument to a Date. If value argument is a number, this number is interpreted as a Unix timestamp, i.e. number of milliseconds since Epoch. If value is a String, an attempt is made to parse it according to commonly used date/time formatting patterns. If value is a Data Table, its first-row, first-column cell is converted to a date according to the above rules.

Date

Yes

Yes

dataBlock(Object value [, String charset])

Converts the value argument to a Data Block. Any non-string value is first converted to a string, and then to array of bytes using the provided charset (or UTF-8 if charset is not specified). Resulting byte array is packed into a Data Block and returned.

Supported character sets are listed in the appendix.

String

Yes

Yes