Built-in operators

Crosswalk ships with 48 operators. Every one is included by default; Your own operators shows how to choose a subset or add your own.

An operator's inputs are filled in the order you link them, and any input can be a constant typed into the inspector instead. When an input has no value, most operators produce nothing too, and the target field is left out. See How a map runs.

Text

Operator	Id	Inputs	What it does
ab+ Concatenate	text.concat	1 or more	Joins its inputs into one piece of text, in input order.
AB Uppercase	text.upper	1	The text in capitals.
ab Lowercase	text.lower	1	The text in lower case.
⎵ Trim	text.trim	1	The text without spaces at either end.
len Length	text.length	1	How many characters the text has.
◧ Left	text.left	text, count	The first count characters.
◨ Right	text.right	text, count	The last count characters.
sub Substring	text.substring	text, start, length (optional)	Takes length characters from a 0-based start, or the rest of the text when length is left out.
⇄ Replace	text.replace	text, find, replace with	Replaces every occurrence of find with replace with. An empty find leaves the text as it is.

Math

Operator	Id	Inputs	What it does
+ Add	math.add	2 or more	The sum of its inputs.
− Subtract	math.subtract	2	The first input minus the second.
× Multiply	math.multiply	2 or more	The product of its inputs.
÷ Divide	math.divide	2	The first input divided by the second. Dividing by zero is an error.
% Remainder	math.modulo	2	The remainder when the first input is divided by the second.
≈ Round	math.round	value, decimals (optional)	Rounds to decimals places (0 if left out), with halves rounded away from zero: 2.5 gives 3 and -2.5 gives -3.
|x| Absolute	math.abs	1	The number without its sign.
min Smallest	math.min	2 or more	The smallest of its inputs.
max Largest	math.max	2 or more	The largest of its inputs.

Logic

Operator	Id	Inputs	What it does
= Equals	logic.equal	2	True when the inputs are equal: as numbers if both are numeric, otherwise as text.
≠ Not equal	logic.notEqual	2	True when the inputs differ.
> Greater than	logic.greaterThan	2	True when the first input is greater than the second.
≥ At least	logic.greaterOrEqual	2	True when the first input is at least the second.
< Less than	logic.lessThan	2	True when the first input is less than the second.
≤ At most	logic.lessOrEqual	2	True when the first input is at most the second.
∧ And	logic.and	2 or more	True when every input is true.
∨ Or	logic.or	2 or more	True when any input is true.
! Not	logic.not	1	The opposite of its input.
1? Is a number	logic.isNumber	1	True when the input is a number, or text holding a plain decimal number such as "12.5" (not "0x10").
∃ Exists	logic.exists	1	True when the input has a value. null counts as a value.

Date

Operator	Id	Inputs	What it does
now Today	date.today	0	Today's date, in UTC, such as 2026-03-04.
rd Read date	date.parse	text, pattern	Reads a date written another way, such as 04/03/2026 with the pattern dd/MM/yyyy, as 2026-03-04. The pattern uses yyyy, yy, MMM, MM, M, dd, d, HH, mm and ss; anything else must match exactly.
fmt Format date	date.format	date, pattern	Writes a date with a pattern, such as dd MMM yyyy for 04 Mar 2026. The pattern uses yyyy, yy, MMM, MM, M, dd, d, HH, mm and ss.
+dt Add to date	date.add	date, amount, unit	Adds whole days, months or years to a date; a negative amount goes back. The 31st plus a month stops at the end of a shorter month.
Δdt Date difference	date.diff	from, to, unit	Whole days, months or years from one date to another, such as an age in years from a date of birth to today.
dt. Part of date	date.part	date, part	One part of a date as a number: year, month, day, weekday (Monday is 1), hour, minute or second.

Convert

Operator	Id	Inputs	What it does
→1 To number	convert.toNumber	1	Reads the input as a number. Text that isn't a plain decimal number is an error.
→a To text	convert.toText	1	Reads the input as text.
→? To true/false	convert.toBoolean	1	Reads true, false, their text, or a number (0 is false) as true or false.
tbl Look up	convert.lookup	value, table, if not found (optional)	Finds the value in a table, such as { "M": "Male" }, and gives what it maps to. With no match it gives if not found, or leaves the field out.

Flow

Operator	Id	Inputs	What it does
⇥ Only if	flow.onlyIf	condition, value	Passes the value through when the condition is true; otherwise the output is left out.
?: If / else	flow.ifElse	condition, then, else	The then input when the condition is true, otherwise the else input.
?? First of	flow.firstOf	1 or more	The first input that has a value and isn't null.

Aggregate

Operator	Id	Inputs	What it does
Σ Sum	aggregate.sum	1	Adds up the input across every item.
# Count	aggregate.count	1	How many items have a value for the input.
x̄ Average	aggregate.average	1	The mean of the input across every item.
↓ Minimum	aggregate.min	1	The smallest value of the input across every item.
↑ Maximum	aggregate.max	1	The largest value of the input across every item.
Σab Join	aggregate.join	1	Joins the input from every item into one piece of text.

Aggregate operators take a scope: the repeating record they aggregate over, such as PhoneCalls[]. In the editor, drag the record onto the operator to set it.