Runtime Types

tengo runtime types int signed 64bit integer string string float 64bit floating point bool boolean char character ( rune in go) bytes byte array ( \[]byte in go) array objects array ( \[]object in go) immutablearray immutable object array ( \[]object in go) map objects map with string keys ( map\[string]object in go) immutablemap immutable object map with string keys ( map\[string]object in go) time time ( time time in go) error an error with underlying object value of any type undefined undefined type conversion/coercion table src\dst int string float bool char bytes array map time error undefined int strconv float64(v) !isfalsy() rune(v) x x x time unix() x x string strconv strconv !isfalsy() x \[]byte(s) x x x x x float int64(f) strconv !isfalsy() x x x x x x x bool 1 / 0 "true" / "false" x x x x x x x x char int64(c) string(c) x !isfalsy() x x x x x x bytes x string(y) x !isfalsy() x x x x x x array x "\[ ]" x !isfalsy() x x x x x x map x "{ }" x !isfalsy() x x x x x x time x string() x !isfalsy() x x x x x x error x "error " x false x x x x x x undefined x x x false x x x x x x x no conversion; typed value functions for variable will return zero values strconv converted using go's conversion functions from strconv package isfalsy() use docid\ smonyfzo12nj6jxyy8eu4 function string() use object string() function time unix() use time unix(v, 0) to convert to time object isfalsy() object isfalsy() interface method is used to determine if a given value should evaluate to false (e g for condition expression of if statement) int n == 0 string len(s) == 0 float isnan(f) bool !b char c == 0 bytes len(bytes) == 0 array len(arr) == 0 map len(map) == 0 time time iszero() error true (error is always falsy) undefined true (undefined is always falsy) type conversion builtin functions string(x) tries to convert x into string; returns undefined if failed int(x) tries to convert x into int; returns undefined if failed bool(x) tries to convert x into bool; returns undefined if failed float(x) tries to convert x into float; returns undefined if failed char(x) tries to convert x into char; returns undefined if failed bytes(x) tries to convert x into bytes; returns undefined if failed bytes(n) as a special case this will create a bytes variable with the given size n (only if n is int) time(x) tries to convert x into time; returns undefined if failed see docid\ uufozxxguzpcbsx61qiqb for the full list of builtin functions type checking builtin functions is string(x) returns true if x is string; false otherwise is int(x) returns true if x is int; false otherwise is bool(x) returns true if x is bool; false otherwise is float(x) returns true if x is float; false otherwise is char(x) returns true if x is char; false otherwise is bytes(x) returns true if x is bytes; false otherwise is array(x) return true if x is array; false otherwise is immutable array(x) return true if x is immutable array; false otherwise is map(x) return true if x is map; false otherwise is immutable map(x) return true if x is immutable map; false otherwise is time(x) return true if x is time; false otherwise is error(x) returns true if x is error; false otherwise is undefined(x) returns true if x is undefined; false otherwise see docid\ uufozxxguzpcbsx61qiqb for the full list of builtin functions