extra-entries

Entries is a list of key-value pairs, with unique keys.
📦 Node.js, 🌐 Web, 📜 Files, 📰 Docs, 📘 Wiki.

All functions except from*() take entries as 1st parameter, and expect it to be iterable. It does not need to be an array. Entries are returned by Array, Object, Set, Map.

This package is available in Node.js and Web formats. The web format is exposed as extra_entries standalone variable and can be loaded from jsDelivr CDN.

Stability: Experimental.


const entries = require('extra-entries');
// import * as entries from "extra-entries";
// import * as entries from "https://unpkg.com/extra-entries/index.mjs"; (deno)

var x = [['a', 1], ['b', 2], ['c', 3], ['d', 4], ['e', 5]];
[...entries.filter(x, v => v % 2 === 1)];
// [ [ 'a', 1 ], [ 'c', 3 ], [ 'e', 5 ] ]

var x = [['a', 1], ['b', 2], ['c', -3], ['d', -4]];
entries.some(x, v => v > 10);
// false

var x = [['a', 1], ['b', 2], ['c', -3], ['d', -4]];
entries.min(x);
// [ 'd', -4 ]

var x = [['a', 1], ['b', 2], ['c', 3]];
[...entries.subsets(x)].map(a => [...a]);
// [
// [],
// [ [ 'a', 1 ] ],
// [ [ 'b', 2 ] ],
// [ [ 'a', 1 ], [ 'b', 2 ] ],
// [ [ 'c', 3 ] ],
// [ [ 'a', 1 ], [ 'c', 3 ] ],
// [ [ 'b', 2 ], [ 'c', 3 ] ],
// [ [ 'a', 1 ], [ 'b', 2 ], [ 'c', 3 ] ]
// ]


Index

Property Description
is Checks if value is entries.
get Gets value at key.
set Sets value at key.
remove Deletes an entry.
swap Exchanges two values.
size Gets size of entries.
head Gets first entry.
take Keeps first n entries only.
shift Removes first entry.
fromLists Creates entries from lists.
concat Appends entries from maps, preferring last.
flat Flattens nested entries to given depth.
chunk Breaks entries into chunks of given size.
filterAt Gets entries with given keys.
map Updates values based on map function.
filter Keeps entries which pass a test.
reduce Reduces values to a single value.
range Finds smallest and largest entries.
count Counts values which satisfy a test.
partition Segregates values by test result.
cartesianProduct Lists cartesian product of entries.
some Checks if any value satisfies a test.
zip Combines matching entries from all entries.
union Gives entries present in any entries.
intersection Gives entries present in both entries.
difference Gives entries not present in another.
symmetricDifference Gives entries not present in both entries.
isDisjoint Checks if entries have no common keys.
key Picks an arbitrary key.
value Picks an arbitrary value.
entry Picks an arbitrary entry.
subset Gives an arbitrary subset.
isEmpty Checks if entries is empty.
isEqual Checks if two maps are equal.
compare Compares two entries.
find Finds a value passing a test.
search Finds key of an entry passing a test.
scanWhile Finds key of first entry not passing a test.



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