[jira] [Commented] (COUCHDB-1300) Array.prototype isn't working properly

[Filipe Manana (Commented) (JIRA)]

[ 
https://issues.apache.org/jira/browse/COUCHDB-1300?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13118937#comment-13118937
 ] 

Filipe Manana commented on COUCHDB-1300:


Hi, there's a reason for that, and it's exactly the same reason why foo 
instanceof Array fails when foo is created in a browser iframe and the 
previous expression evaluated in another iframe which is accessing that array.

For couch, the user document is json decoded in one javascript context and the 
map function ran against the document is executed in another context (a 
sandbox). Each context has its own Array constructor.


 Array.prototype isn't working properly
 --

 Key: COUCHDB-1300
 URL: https://issues.apache.org/jira/browse/COUCHDB-1300
 Project: CouchDB
  Issue Type: Bug
  Components: JavaScript View Server
Affects Versions: 1.1
 Environment: Ubuntu 11.04, node.couchapp, commonJS
Reporter: paul iannazzo
  Labels: javascript, patch

 ##file helpers.js in views/lib/common
 const _ = require(views/lib/underscore);
 Array.prototype.compact = function(){return _.compact(this);};
 Array.prototype.flatten = function(){return _.flatten(this);};
 //this function is called from views.someName.map
 function commonProperties(doc){
 arr = [];
 arr = arr.compact();
 log(arr);
 log(is array?);
 log(toString.call(doc.store.taxes));
 log(doc.store.taxes);
 //log(doc.store.taxes.compact());
 log(is safe array?);
 log(toString.call(safe.array(doc.store.taxes)));
 log(safe.array(doc.store.taxes));
//log(safe.array(doc.store.taxes).compact());
 log(array?);
 log(toString.call(Array(safe.array(doc.store.taxes;
 log(Array(doc.store.taxes));
 log(Array(doc.store.taxes).compact());
 ...
 ::LOG
 [info] [0.3429.0] OS Process #Port0.5316 Log :: []
 [info] [0.3429.0] OS Process #Port0.5316 Log :: is array?
 [info] [0.3429.0] OS Process #Port0.5316 Log :: [object Array]
 [info] [0.3429.0] OS Process #Port0.5316 Log :: 
 [{taxId:0,number:00,percent:8},{taxId:1,number:,percent:5},{taxId:2,number:,percent:1}]
 [info] [0.3429.0] OS Process #Port0.5316 Log :: is safe array?
 [info] [0.3429.0] OS Process #Port0.5316 Log :: [object Array]
 [info] [0.3429.0] OS Process #Port0.5316 Log :: 
 [{taxId:0,number:00,percent:8},{taxId:1,number:,percent:5},{taxId:2,number:,percent:1}]
 [info] [0.3429.0] OS Process #Port0.5316 Log :: array?
 [info] [0.3429.0] OS Process #Port0.5316 Log :: [object Array]
 [info] [0.3429.0] OS Process #Port0.5316 Log :: 
 [[{taxId:0,number:00,percent:8},{taxId:1,number:,percent:5},{taxId:2,number:,percent:1}]]
 the .compact() lines that are commented out cause errors:
 [info] [0.3429.0] OS Process #Port0.5316 Log :: []
 [info] [0.3429.0] OS Process #Port0.5316 Log :: is array?
 [info] [0.3429.0] OS Process #Port0.5316 Log :: [object Array]
 [info] [0.3429.0] OS Process #Port0.5316 Log :: 
 [{taxId:0,number:00,percent:8},{taxId:1,number:,percent:5},{taxId:2,number:,percent:1}]
 [info] [0.3429.0] OS Process #Port0.5316 Log :: function raised exception 
 (new TypeError(doc.store.taxes.compact is not a function, , 29)) with 
 doc._id RT7-RT7-31-20
 the first logs show that doc.store.taxes is an array, why do i need to use 
 Array() on it in order to use the prototype functions?

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[jira] [Commented] (COUCHDB-1300) Array.prototype isn't working properly

[paul iannazzo (Commented) (JIRA)]

[ 
https://issues.apache.org/jira/browse/COUCHDB-1300?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13118941#comment-13118941
 ] 

paul iannazzo commented on COUCHDB-1300:


I found a workaround (i guess solution in this case) to my problem.
instead of using array prototypes i can get the same functionality via monads 
(specifically the underscore library).

anyway, i found this issue very confusing.

thank you for your quick response.

 Array.prototype isn't working properly
 --

 Key: COUCHDB-1300
 URL: https://issues.apache.org/jira/browse/COUCHDB-1300
 Project: CouchDB
  Issue Type: Bug
  Components: JavaScript View Server
Affects Versions: 1.1
 Environment: Ubuntu 11.04, node.couchapp, commonJS
Reporter: paul iannazzo
  Labels: javascript, patch

 ##file helpers.js in views/lib/common
 const _ = require(views/lib/underscore);
 Array.prototype.compact = function(){return _.compact(this);};
 Array.prototype.flatten = function(){return _.flatten(this);};
 //this function is called from views.someName.map
 function commonProperties(doc){
 arr = [];
 arr = arr.compact();
 log(arr);
 log(is array?);
 log(toString.call(doc.store.taxes));
 log(doc.store.taxes);
 //log(doc.store.taxes.compact());
 log(is safe array?);
 log(toString.call(safe.array(doc.store.taxes)));
 log(safe.array(doc.store.taxes));
//log(safe.array(doc.store.taxes).compact());
 log(array?);
 log(toString.call(Array(safe.array(doc.store.taxes;
 log(Array(doc.store.taxes));
 log(Array(doc.store.taxes).compact());
 ...
 ::LOG
 [info] [0.3429.0] OS Process #Port0.5316 Log :: []
 [info] [0.3429.0] OS Process #Port0.5316 Log :: is array?
 [info] [0.3429.0] OS Process #Port0.5316 Log :: [object Array]
 [info] [0.3429.0] OS Process #Port0.5316 Log :: 
 [{taxId:0,number:00,percent:8},{taxId:1,number:,percent:5},{taxId:2,number:,percent:1}]
 [info] [0.3429.0] OS Process #Port0.5316 Log :: is safe array?
 [info] [0.3429.0] OS Process #Port0.5316 Log :: [object Array]
 [info] [0.3429.0] OS Process #Port0.5316 Log :: 
 [{taxId:0,number:00,percent:8},{taxId:1,number:,percent:5},{taxId:2,number:,percent:1}]
 [info] [0.3429.0] OS Process #Port0.5316 Log :: array?
 [info] [0.3429.0] OS Process #Port0.5316 Log :: [object Array]
 [info] [0.3429.0] OS Process #Port0.5316 Log :: 
 [[{taxId:0,number:00,percent:8},{taxId:1,number:,percent:5},{taxId:2,number:,percent:1}]]
 the .compact() lines that are commented out cause errors:
 [info] [0.3429.0] OS Process #Port0.5316 Log :: []
 [info] [0.3429.0] OS Process #Port0.5316 Log :: is array?
 [info] [0.3429.0] OS Process #Port0.5316 Log :: [object Array]
 [info] [0.3429.0] OS Process #Port0.5316 Log :: 
 [{taxId:0,number:00,percent:8},{taxId:1,number:,percent:5},{taxId:2,number:,percent:1}]
 [info] [0.3429.0] OS Process #Port0.5316 Log :: function raised exception 
 (new TypeError(doc.store.taxes.compact is not a function, , 29)) with 
 doc._id RT7-RT7-31-20
 the first logs show that doc.store.taxes is an array, why do i need to use 
 Array() on it in order to use the prototype functions?

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