Class: Toybox.Lang.String

Inherits:

Toybox.Lang.Object

show all

Overview

String objects represent a sequence of characters, and provide methods for string operations.

Since:

API Level 1.0.0

Instance Method Summary collapse

compareTo(other as Lang.Object) as Lang.Number

Lexicographically compare self to some other string.
equals(other as Lang.Object or Null) as Lang.Boolean

Test if an Object instance is equal to another instance of an Object.
find(string as Lang.String) as Lang.Number or Null

Determine if the specified String exists in a String.
hashCode() as Lang.Number

Get a hash code value for a String.
length() as Lang.Number

Get the number of characters in a String.
substring(startIndex as Lang.Number or Null, endIndex as Lang.Number or Null) as Lang.String or Null

Create a new String that contains the contents of the current String from a start position to an end position.
toCharArray() as Lang.Array<Lang.Char>

Convert a String to an Array of Char objects.
toDouble() as Lang.Double or Null

Convert a String to a Double.
toFloat() as Lang.Float or Null

Convert a String to a Float.
toLong() as Lang.Long or Null

Convert a String to a Long.
toLongWithBase(base as Lang.Number) as Lang.Long or Null

Convert a String to a Long using a specified base.
toLower() as Lang.String

Convert a String to lowercase.
toNumber() as Lang.Number or Null

Convert a String to a Number.
toNumberWithBase(base as Lang.Number) as Lang.Number or Null

Convert a String to a Number using a specified base.
toString() as Lang.String

Convert a String to a String.
toUpper() as Lang.String

Convert a String to uppercase.
toUtf8Array() as Lang.Array<Lang.Number>

Convert a String to an Array of Number objects.

Instance Method Details

compareTo(other as Lang.Object) as Lang.Number

Lexicographically compare self to some other string.

Parameters:

other — (Lang.Object) —

The right hand side of a comparison.

Returns:

Lang.Number —

A negative value if self is less than other, zero if the objects are equivalent, and a positive value if self is greater than other.

Since:

API Level 5.0.0

Throws:

(Lang.UnexpectedTypeException) —

Thrown if other is not of type String.

equals(other as Lang.Object or Null) as Lang.Boolean

Test if an Object instance is equal to another instance of an Object.

Parameters:

other — (Lang.Object) —

The Object to test against

Returns:

Lang.Boolean —

true if the Objects are equal, otherwise false

Since:

API Level 1.0.0

find(string as Lang.String) as Lang.Number or Null

Determine if the specified String exists in a String.

Parameters:

string — (Lang.String) —

String to find

Example:

var myString = "Go bananas with Monkey C!";
var index = myString.find("bananas"); // index is 3

Returns:

Lang.Number —

The index of the start of the specified String, or null if not found

Since:

API Level 1.0.0

hashCode() as Lang.Number

Get a hash code value for a String.

Returns:

Lang.Number —

The hash code for the String

Since:

API Level 1.0.0

length() as Lang.Number

Get the number of characters in a String.

Returns:

Lang.Number —

The length of the String

Since:

API Level 1.0.0

substring(startIndex as Lang.Number or Null, endIndex as Lang.Number or Null) as Lang.String or Null

Create a new String that contains the contents of the current String from a start position to an end position.

Note:

Starting with 3.3.2, passing null for startIndex sets it to the start of the string and passing null for endIndex sets it to the end of the string. Passing in a negative number for either startIndex or endIndex offsets it from the end of the string.

Parameters:

startIndex — (Lang.Number) —

Zero-based start index of the substring
endIndex — (Lang.Number) —

End position of the substring, exclusive

Example:

var myString = "Go bananas with Monkey C!";
var mySubString = myString.substring(3, 10); // mySubString is "bananas"

Returns:

Lang.String —

The substring of the String or null on error

Since:

API Level 1.0.0

toCharArray() as Lang.Array<Lang.Char>

Convert a String to an Array of Char objects.

Returns:

Lang.Array —

A Char Array representation of the String, where each character in the String is an element in the Array

Since:

API Level 1.3.0

toDouble() as Lang.Double or Null

Convert a String to a Double.

If a String is in the numeric form of "123" or "123.45", convert it to a Double. Additional characters after the detected floating point value will be ignored. Strings that cannot be interpreted as a Double, or whose value exceeds that which can be represented in a Double, will result in a null value.

Example:

var myString;
var myNum;

myString = "123";
myNum = myString.toDouble(); // myNum is 123.000000

myString = "3.14"
myNum = myString.toDouble(); // myNum is 3.140000

myString = "192.168.0.1"
myNum = myString.toDouble(); // myNum is 192.167999

myString = "Hello There!"
myNum = myString.toDouble(); // null

Returns:

Lang.Double —

A Double representation of the String

Since:

API Level 3.1.0

toFloat() as Lang.Float or Null

Convert a String to a Float.

If a String is in the numeric form of "123" or "123.45", convert it to a Float. Additional characters after the detected floating point value will be ignored. Strings that cannot be interpreted as a Float, or whose value exceeds that which can be represented in a Float, will result in a null value.

Example:

var myString;
var myNum;

myString = "123";
myNum = myString.toFloat(); // myNum is 123.000000

myString = "3.14"
myNum = myString.toFloat(); // myNum is 3.140000

myString = "192.168.0.1"
myNum = myString.toFloat(); // myNum is 192.167999

myString = "Hello There!"
myNum = myString.toFloat(); // null

Returns:

Lang.Float —

A Float representation of the String

Since:

API Level 1.0.0

toLong() as Lang.Long or Null

Convert a String to a Long.

If a String is in the numeric form of "123", it can be converted to a Long. Additional characters after the detected number value will be ignored. Strings that cannot be interpreted as a Long, or whose value exceeds that which can be represented in a Long, will result in a null value.

Example:

var myString;
var myNum;

myString = "123";
myNum = myString.toLong(); // myNum is 123

myString = "3.14"
myNum = myString.toLong(); // myNum is 3

myString = "1200 E. 151st. Street"
myNum = myString.toLong(); // myNum is 1200

myString = "Hello There!"
myNum = myString.toLong(); // null

Returns:

Lang.Long —

A Long representation of the String

Since:

API Level 3.1.0

toLongWithBase(base as Lang.Number) as Lang.Long or Null

Convert a String to a Long using a specified base.

Parameters:

base — (Lang.Object) —
The base of the input string. If the value of base is zero, the string content is expected to have syntax similar to that of integer constants, which includes:
- An optional sign character ('+' or '-')
- An optional prefix for octal or hexadecimal ('0' or '0x')
- A sequence of digits in the prefixed base, or decimal if none was specified. If the base value is between 2 and 36, the format expected for the number is valid digits and/or letters that represent integers of the specified radix (from '0' to 'z' or 'Z' for base 36).

Example:

var myString;
var myNum;

myString = "10";
myNum = myString.toLongWithBase(2);    // myNum is 2

myString = "FF";
myNum = myString.toLongWithBase(16);   // myNum is 255
myNum = myString.toLongWithBase(0x10); // myNum is 255

Returns:

Lang.Long —

A Long representation of the String

Since:

API Level 3.1.0

toLower() as Lang.String

Convert a String to lowercase.

Returns:

Lang.String —

A new lowercase String

Since:

API Level 1.0.0

toNumber() as Lang.Number or Null

Convert a String to a Number.

If a String is in the numeric form of "123", it can be converted to a Number. Additional characters after the detected number value will be ignored. Strings that cannot be interpreted as a Number, or whose value exceeds that which can be represented in a Number, will result in a null value.

Example:

var myString;
var myNum;

myString = "123";
myNum = myString.toNumber(); // myNum is 123

myString = "3.14"
myNum = myString.toNumber(); // myNum is 3

myString = "1200 E. 151st. Street"
myNum = myString.toNumber(); // myNum is 1200

myString = "Hello There!"
myNum = myString.toNumber(); // null

Returns:

Lang.Number —

A Number representation of the String

Since:

API Level 1.0.0

toNumberWithBase(base as Lang.Number) as Lang.Number or Null

Convert a String to a Number using a specified base.

Parameters:

base — (Lang.Object) —
The base of the input string. If the value of base is zero, the string content expected to have syntax similar to that of integer constants, which includes:
- An optional sign character ('+' or '-')
- An optional prefix for octal or hexadecimal ('0' or '0x')
- A sequence of digits in the prefixed base, or decimal if none was specified. If the base value is between 2 and 36, the format expected for the number is valid digits and/or letters that represent integers of the specified radix (from '0' to 'z' or 'Z' for base 36).

Example:

var myString;
var myNum;

myString = "10";
myNum = myString.toNumberWithBase(2);    // myNum is 2

myString = "FF";
myNum = myString.toNumberWithBase(16);   // myNum is 255
myNum = myString.toNumberWithBase(0x10); // myNum is 255

Returns:

Lang.Number —

A Number representation of the String

Since:

API Level 1.4.1

toString() as Lang.String

Convert a String to a String.

Returns:

Lang.String —

A String representation of String

Since:

API Level 1.0.0

toUpper() as Lang.String

Convert a String to uppercase.

Returns:

Lang.String —

A new uppercase String

Since:

API Level 1.0.0

toUtf8Array() as Lang.Array<Lang.Number>

Convert a String to an Array of Number objects.

Each Number represents one byte of the UTF-8 representation of the String.

Returns:

Lang.Array —

An Array representation of the String, where each byte in the string is an element in the Array

Since:

API Level 1.3.0

Generated Dec 11, 2024, 8:58:43 AM