obop

MongoDB-style object operators makes array manipulation easy: where/order/update/view

obop

MongoDB-style object operators makes array manipulation easy: where/order/update/view

var obop = require('obop')();
var src = [ { a: 1 }, { a: 2 }, { a: 3 } ];
var out = obop.where( src, { a: 2 } ); // => [ { a: 2 } ] 

Install obop module via npm.

<script src="obop.min.js"></script>
<script>
  var src = [ { a: 1 }, { a: 2 }, { a: 3 } ];
  var out = obop.where( src, { a: 2 } ); // => [ { a: 2 } ]
</script> 

Download obop.min.js browser build of this module.

See document for more detail.

where() method supports the following query selectors:

{ field: value }                            // equal to 
{ field: { $gt: value } }                   // greater than 
{ field: { $gte: value } }                  // greater than or equal to 
{ field: { $in: [value1, value2, ... ] } }  // in 
{ field: { $lt: value } }                   // less than 
{ field: { $lte: value } }                  // less than or equal to 
{ field: { $ne: value } }                   // not equal to 
{ field: { $nin: [ value1, value2 ... ]} }  // not in 
{ $or: [ { query1 }, { qury2 }, ... ] }     // logical OR 
{ $and: [ { query1 }, { query2 }, ... ] }   // logical AND 
{ field: { $not: { query } } }              // not 
{ field: { $exists: boolean } }             // exists 
{ field: { $size: value } }                 // array size 

Example:

var out1 = obop.where( src1, { genre: 'fruit', price: { $gt: 100, $gt: 200 } } );
var out2 = obop.where( src2, { 'review.score': { $gte: 4.0 } } );

order() method supports the following styles of sort parameters:

{ field: 1 }                                // ascending 
{ field: -1 }                               // descending 
{ field1: 1, field2: -1, ... }              // combination 
[ [ 'field1', 1 ], [ 'field2', -1 ], ... ]  // array style 

Example:

var out1 = obop.order( src1, { price: 1, stock: -1 } );
var out2 = obop.order( src2, [['price', 1], ['stock', -1]] ); // same as above 

update() method supports the following update operators:

{ $set: { field: value } }                  // set value 
{ $unset: { field: '' } }                   // remove field 
{ $rename: { oldname: newname } }           // rename field 
{ $inc: { field: amount } }                 // increment value 
{ $pull: { field: query } }                 // remove item from array 
{ $push: { field: value } }                 // add item to array 

Example:

var out1 = obop.update( src1, { $inc: { stock: -1 }, $set: { 'review.score': 4 } } );
var out2 = obop.update( src2, { $unset: { order: '' } } );

view() method supports the following styles of projection parameters:

{ field1: 1 }                               // output fields1 only 
{ field1: 1, field2: 1, ... }               // output fields1, 2 and more 
{ field1: 0 }                               // output all fields except for fields1 
{ field1: 0, field2: 0, ... }               // except fields1, 2 and more 

Example:

var out1 = obop.view( src1, { name: 1, price: 1, stock: 1 } );  // include fields 
var out2 = obop.view( src2, { _id: 0, secret: 0 } );            // exclude fields 

https://github.com/kawanet/obop

https://raw.github.com/kawanet/obop/master/build/obop.min.js

http://kawanet.github.io/obop/docs/obop.html

https://github.com/kawanet

Copyright 2013-2015 @kawanet

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