lang

Language primitives: string, number, bytes, array, and boolean helpers for data manipulation. Requires load lang (import the helpers you use, e.g. load lang [@map @filter], or qualify them as @lang:map).

load lang

Helpers

Helper	Returns	Description
@lang:all	bool	Return true if every element satisfies the predicate.
@lang:any	bool	Return true if at least one element satisfies the predicate.
@lang:at	any	Access an element by index in an array.
@lang:bytes.at	bytes	Access a single byte by index in a bytes value.
@lang:bytes.concat	bytes	Concatenate bytes values together.
@lang:bytes.len	number	Return the byte length of a bytes value.
@lang:bytes.not	bytes	Bitwise NOT of a bytes value (256-bit complement).
@lang:bytes.slice	bytes	Extract a byte range from a bytes value.
@lang:concat	array	Concatenate arrays together.
@lang:enumerate	array	Return an array of [index, element] pairs.
@lang:filter	array	Keep elements of an array for which a helper returns truthy.
@lang:find	any	Return the first element that satisfies the predicate.
@lang:flat	array	Flatten one level of nesting in an array.
@lang:includes	bool	Check whether an array contains an element.
@lang:len	number	Return the length of an array.
@lang:map	array	Transform each element of an array by applying a helper.
@lang:num.format	string	Format a number with decimal places (like formatUnits).
@lang:num.parse	number	Parse a decimal string with a given number of decimals (like parseUnits).
@lang:reduce	any	Reduce an array to a single value by applying a helper.
@lang:reverse	array	Return a new array with elements in reverse order.
@lang:slice	array	Extract a section of an array.
@lang:sort	array	Sort an array using a comparator helper.
@lang:str.at	string	Access a character by index in a string.
@lang:str.concat	string	Concatenate strings together.
@lang:str.includes	bool	Check whether a string contains a substring.
@lang:str.join	string	Join array elements into a string with a delimiter.
@lang:str.len	number	Return the length of a string.
@lang:str.lower	string	Convert a string to lowercase.
@lang:str.replace	string	Replace all occurrences of a substring.
@lang:str.slice	string	Extract a section of a string.
@lang:str.split	array	Split a string by a delimiter into an array of strings.
@lang:str.upper	string	Convert a string to uppercase.
@lang:unique	array	Remove duplicates from an array, preserving first-occurrence order.
@lang:unzip	array	Transpose an array of pairs into two separate arrays.
@lang:zip	array	Combine two arrays element-wise into an array of pairs.