Node.js implementation of a trie and a radix tree tailored towards exact matches.

Used to create the trie: const trie = new ExactTrie();.

• options (optional)
  • ignoreCase (true, optional) set to true to convert all keys to lower case.

Used to insert single element into the trie. Returns the same instance of ExactTrie to allow chaining.

• key search key, must be a string.
• value value to be inserted, can by any type.
• reverse (false, optional) set to true to reverse the key before inserting.

Used to insert multiple elements into the trie. Returns the same instance of ExactTrie to allow chaining.

• keys search keys, must be an array of strings.
• values values to be inserted, can be an array of values of any type or a single value. If an array is provided, each key from keys will be assigned a corresponding value from values. Otherwise all keys will receive the same value.
• reverse (false, optional) set to true to reverse the key before inserting.

Used to retrieve elements from the trie. Returns undefined if the key is not present in the trie.

• key search key, must be a string.
• reverse (false, optional) set to true to reverse the key before searching.

Same as get(...), except this function takes an array of keys and returns an array of values.

Used to check if the key is present in the true. Returns a boolean.

• key search key, must be a string.
• reverse (false, optional) set to true to reverse the key before searching.

Same as has(...), except this function takes an array of keys and returns an array of booleans.

Used to retrieve the value corresponding to they key that matches the longest prefix of string. If there are no matches, undefined is returned.

• string string to check for prefixes, must be a string.
• checkpointChar (null, optional) character used to separate potential prefixes. When set to null, every possible prefix is considered.
• reverse (false, optional) set to true to reverse the string before searching.

Same as getWithCheckpoints(...), except this function takes an array of keys and returns an array of values.

Used to check if any key matches relevant prefixes from string. Returns a boolean

• string string to check for prefixes, must be a string.
• checkpointChar (null, optional) character used to separate potential prefixes. When set to null, every possible prefix is considered.
• reverse (false, optional) set to true to reverse the string before searching.

Same as hasWithCheckpoints(...), except this function takes an array of keys and returns an array of booleans.

const ExactTrie = require('exact-trie');

// Creating a trie instance
const trie = new ExactTrie({ignoreCase: true}); // `ignoreCase` is `true` by default

// Basic API and exact key matches
trie.put('life', 32);
console.log(trie.has('life')); // prints `true`
console.log(trie.get('life')); // prints `32`
console.log(trie.has('lif'));  // prints `false`
console.log(trie.get('lif'));  // prints `undefined`

// Multiple values with changing
trie
    .putAll(['a', 'b'], [1, 2])
    .putAll(['c', 'd'], 34)
    .put('e', 5);
console.log(trie.getAll(['a', 'b', 'c', 'd', 'e', 'f']));
// -> prints `[1, 2, 34, 34, 5, undefined]`

// Various values and overwriting
const world = {response: 'world'};
trie.put('hello', world);
console.log(trie.get('hello')); // prints `{ response: 'world' }`
trie.put('hello', 3);
console.log(trie.get('hello')); // prints `3`

// Reversing keys
trie.put('oxygen', 8, true);
console.log(trie.has('oxygen'));               // prints `false`
console.log(trie.has('negyxo'));               // prints `true`
console.log(trie.has('oxygen', true)); // prints `true`

// Matching with checkpoints
trie.put('tim', 'Name is Tim');
trie.put('tim.kuzh', 'Tim Kuzh is the name');
console.log(trie.getWithCheckpoints('tim.kuzh', '.'));
// -> prints `Tim Kuzh is the name`
console.log(trie.getWithCheckpoints('tim.cook', '.'));
// -> prints `Name is Tim`

// Matching file extensions
trie.put('tar.gz', 'archive', true);
trie.put('gz', 'gzipped file', true);
console.log(trie.getWithCheckpoints('MyArchive.tar.gz', '.', true));
// -> prints `archive`
console.log(trie.getWithCheckpoints('DataSet.gz', '.', true));
// -> prints `gzipped file`