Processes the supplied sequence from left to right, applying the supplied function repeatedly to each item in turn, together with an accumulated result value.
fold-left($seq as item()*, $zero as item()*, $f as function(item()*, item()) as item()*) ➔ item()*
The input sequence
The initial value (the value to be returned if the sequence is empty)
function(item()*, item()) as item()*
The function to be applied to each item in the sequence
Links to W3C specifications
XPath 3.1 Functions and Operators
Available in XPath 3.0, XSLT 3.0, XQuery 3.0, and later versions. From Saxon 10, available in all editions. Implemented in Saxon-PE and Saxon-EE since Saxon 9.6.
Notes on the Saxon implementation
Available in Saxon-HE since 10; in Saxon-PE/EE since 9.6.