danmaispace

How to find a document by using MongoDB ID

published by chao on Thu, 01/05/2012 - 22:48
Categories:
TechnologyDatabase
MongoDBObjectID
When obtain the ID from request parameter: 4eec06b12dacbe7275000005, it is string, however, the format of _id is ObjectID. String and ObjectID are different types. MongoDB driver provides a function to serialize the 12 character string into a ObjectID type.

var ObjectId = collection.db.original.bson_serializer.ObjectID;
collection.findOne({'_id': ObjectId(idString)}, console.log);

danmaispace

// ----------------------------------------------------------
// A short snippet for detecting versions of IE in JavaScript
// without resorting to user-agent sniffing
// ----------------------------------------------------------
// If you're not in IE (or IE version is less than 5) then:
//     ie === undefined
// If you're in IE (>=5) then you can determine which version:
//     ie === 7; // IE7
// Thus, to detect IE:
//     if (ie) {}

danmaispace

/**
 * The final thing is to add a tap listener that is called whenever the user taps on the screen.
 * We do a quick check to make sure they're not tapping on the carousel indicators (tapping on
 * those indicators moves you between items so we don't want to override that), then either hide 
 * or show the info Component.
 */
Ext.Viewport.element.on('tap', function(e) {
    if (!e.getTarget('.x-carousel-indicator')) {
        if (titleVisible) {
            info.element.removeCls('apod-title-visible');

danmaispace

class BaseCodec
  def self.base_n_decode(s, alphabets)
    n = alphabets.length
    rv = pos = 0
    charlist = s.split("").reverse
    charlist.each do |char|
      rv += alphabets.index(char) * n ** pos
      pos += 1
    end
    return rv

danmaispace

#!/usr/bin/env ruby
#
# = gist(1)
#
# == USAGE
#  gist < file.txt
#  echo secret | gist -p  # or --private
#  echo "puts :hi" | gist -t rb
#  gist script.py
#