petkaantonov / deque Goto Github PK

Hi, thank you for your work. It's great.

I'd like to use this module for my project. But, I need to copy the deque instance after creation. I guess the only way is making another deque instance after toArray from the previous one. I'm afraid of losing a performance gain in this way.

Any other better way to copy it?

Hi, it would be nice if we could specify a maximum length for the queue. If you push onto a full queue, it pops from the end, never increasing in size above the specified maximum.

Hi Sir,
Please help me, how can I resolve this problem?

TypeError: Cannot assign to read only property 'isEmpty' of #
at Object. (C:\Users\Acer Valued Customer\Documents\Serboy\Coding\Analytics\Analytics.Web\node_modules\double-ended-queue\js\deque.js:185:25)
at Module._compile (module.js:409:26)
at Object.Module._extensions..js (module.js:416:10)
at Module.load (module.js:343:32)
at Function.Module._load (module.js:300:12)
at Module.require (module.js:353:17)
at require (internal/module.js:12:17)
at Object. (C:\Users\Acer Valued Customer\Documents\Serboy\Coding\Analytics\Analytics.Web\node_modules\redis\index.js:8:13)
at Module._compile (module.js:409:26)
at Object.Module._extensions..js (module.js:416:10)
at Module.load (module.js:343:32)
at Function.Module._load (module.js:300:12)
at Module.require (module.js:353:17)
at require (internal/module.js:12:17)
at Object. (C:\Users\Acer Valued Customer\Documents\Serboy\Coding\Analytics\Analytics.Web\node_modules\connect-redis\lib\connect-redis.js:8:13)
at Module._compile (module.js:409:26)
at Object.Module._extensions..js (module.js:416:10)
at Module.load (module.js:343:32)
at Function.Module._load (module.js:300:12)
at Module.require (module.js:353:17)
at require (internal/module.js:12:17)
at Object. (C:\Users\Acer Valued Customer\Documents\Serboy\Coding\Analytics\Analytics.Web\node_modules\connect-redis\index.js:1:80)
at Module._compile (module.js:409:26)
at Object.Module._extensions..js (module.js:416:10)
at Module.load (module.js:343:32)
at Function.Module._load (module.js:300:12)
at Module.require (module.js:353:17)
at require (internal/module.js:12:17)

Thanks,

i am using this in my project , but problem is that i am not getting queue item id , because i want remove item from queue , when user cancel the request . is it possible?

Adding a .next will allow a deque to be iterated over by for...of loops and the like.

Hi @petkaantonov -

I'd like to be able to iterate over the elements in a queue without converting it to an array. To do this I need to expose Deque's length attribute (i.e. change it from _length to length). I'd be happy to submit a PR for this if you think it's a reasonable change. Please let me know.

Ryan

I'm getting significantly faster performance using a native array this.arr = []; and replacing all instances of this[] with this.arr[] . Running the two_million benchmark, I'm getting ~23 milllion ops/s with this[] vs 25-26 million ops/s using this.arr[]

Thoughts?

Darwin 13.4.0 x64
Node.JS 4.1.2
V8 4.5.103.35
Intel(R) Core(TM) i7-4870HQ CPU @ 2.50GHz × 8