xs = [1, 2, 3]
ys = [ 1, 2 | [3, 4] ]
| Syntax |
Description |
hd |
Head |
tl |
Tail |
x in xs |
Membership |
xs ++ ys |
Concatenation |
xs -- ys |
Removes first occurrence of each y from xs |
| Syntax |
Description |
Enum.at(xs, i, default \\ nil) |
Indexing, returns elt or default |
Enum.fetch(xs, i) |
Indexing, returns {:ok, elt} or :error |
Enum.fetch!(xs, i) |
Indexing, returns elt or raises exception |
| Syntax |
Description |
Enum.all?(xs, f \\ id) |
Check if all f(x) are truthy |
Enum.any?(xs, f \\ id) |
Check if some f(x) is truthy |
Enum.count(xs, f) |
Count how many f(x) are truthy |
Enum.each(xs, f) |
Calls f for every x |
Enum.filter(xs, f) |
Returns those x where f(x) is truthy |
Enum.find(xs, default \\ nil, f) |
Finds first x for which f(x) is truthy |
Enum.find_index(xs, f) |
Index of first x for which f(x) is truthy, or nil |
Enum.flat_map(xs, f) |
Flattening of [ f(x1), f(x2), ... ] |
Enum.map(xs, f) |
[f(x1), f(x2), ... ] |
Enum.reduce(xs, f) |
Fold with f(x, acc) |
Enum.reduce(xs, init, f) |
Fold with f(x, acc) |
Enum.reject(xs, f) |
Returns those x where f(x) is falsey |
Enum.sum(xs) |
Returns sum |
Enum.with_index(xs, start_i) |
Pairs items up with index {x[i], i} |
Enum.zip(xss) |
Zips xss into list of tuples |
Enum.zip(xs, ys) |
Zips xs and ys into list of tuples |
| Syntax |
Description |
Enum.drop(xs, n) |
Drops n first elements of xs |
Enum.join(xs, sep \\ "") |
Produces string |
Enum.length(xs) |
Length of xs |
Enum.max(xs, if_empty_func) |
Maximum |
Enum.max_by(xs, f, if_empty_func) |
Maximum |
Enum.min(xs, if_empty_func) |
Minimum |
Enum.min_by(xs, f, if_empty_func) |
Minimum |
Enum.random(xs) |
Random element from xs |
Enum.reverse(xs) |
Reverses order |
Enum.shuffle(xs) |
Shuffles order |
Enum.slice(xs, range) |
Returns slice |
Enum.slice(xs, start, len) |
Returns slice |
Enum.sort(xs) |
Sorts |
Enum.sort_by(xs, key_f, sorter_f \\ &<=/2) |
Sorts |
Enum.split(xs, n) |
Splits xs in two parts where first part contains n elements |
Enum.uniq(xs) |
Removes duplicates |
Enum.uniq_by(xs, eq_f) |
Removes duplicates |