List functions

list.apply(list, expression) : list

Create a new list by applying the expression to each item.

list.average(list, expression) : num

Get the average of the values in a list.

list.collect(list, key) : list

Collect all values from each map inside the list.

list.combine(keys, values) : map

Combine two lists into a map.

list.contains(list, value, ignorecase) : bool

Check if a list contains the given value.

list.count(list, condition) : num

Count the number of items for which the condition succeeds.

list.groupby(list, expression) : map

Group items in a list by common expression value.

list.indexesof(list, value) : list

Find all index positions of the given value.

list.indexof(list, value) : num

Find the index position of the given value.

list.intersect(first, second, condition) : list

Compute the list of values that are common to the first and second list.

Optional: Use the condition (str) expression to determine if an item from the first list should be included in the final list.

• Return true to include, false to exclude.
• Use $left and $right to refer to the current item from the first and seconds lists, respectively.
• Default: equality condition

list.lastindexof(list, value) : num

Find the last index position of the given value.

list.max(list, expression) : num

Get the largest value in a list.

list.min(list, expression) : num

Get the smallest value in a list.

list.new(size, value) : list

Create a list of a given size.

list.orderby(list, keys) : list

Sort items in a list using key names.

list.random(list) : any

Get a random item from the list.

list.reduce(list, expression, value) : any

Combine all values in a list into a single value using the supplied expression.

list.reverse(list) : list

Reverse the items in a list.

Example:

var lst = ["one","two","three","four","five"];
list.reverse(lst);

list.select(list, condition) : list

Create a list that only contains values for which the condition succeeds.

list.sort(list, key, reverse, compare) : list

Sort the items in a list.

Optional:

• Use compare (str) to compare two items.
• Use $left and $right to refer to the left and right items, respectively.
• Return -1 if the left item is less than the right item; 0 if items are equal; +1 if the left item is greater than the right item.

list.splice(list, start, length, values) : list

Split a list and insert new items into it.

Example:

var lst = ["one","two","three","four","five"];
list.splice(lst,2);

list.sum(list, expression) : num

Get the sum of values in a list.