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    level-existspublic

    level-exists

    Check if a datum exists without reading its value.

    build status

    Example

    var exists = require('level-exists');
    var level = require('level');
     
    var db = level(__dirname + '/db');
    exists.install(db);
     
    db.del('foo', function(err) {
      if (err) throw err;
     
      db.exists('foo', function(err, yes) {
        if (err) throw err;
        console.log('foo exists? %s', yes);
        // foo exists? false 
     
        db.put('foo', 'bar', function(err) {
          if (err) throw err;
     
          exists(db, 'foo', function(err, yes) {
            if (err) throw err;
            console.log('foo exists? %s', yes);
            // foo exists? true 
          });
        });
      });
    });

    API

    exists(db, key, cb)

    Check if there's a datum in db with key and call cb with (err, exists).

    exists.install(db)

    db#exists(key, cb)

    Install level-exists onto the db.

    Installation

    With npm do:

    npm install level-exists

    License

    (MIT)

    Copyright (c) 2013 Julian Gruber <julian@juliangruber.com>

    Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

    install

    npm i level-exists

    Downloadslast 7 days

    48

    version

    2.0.2

    license

    MIT

    repository

    github.com

    last publish

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