[Lib/Lua] Moses 2.1.0

[Roland_Yonaba]

Hi all,

I have been working the past days on updating this mammoth (yeah, it is quite huge, as of now).
Moses is mostly meant for functional programming, with Lua. It provides functions to operates on tables array-style, list-style, collection-style or object-style.

Here are some example:

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local _ = require 'moses'

-- Creates an array of values from 1 to 20
local t = _.range(1,20)

-- Filter even values
t = _.select(t, function(i,v) return v%2~=0 end)

-- Double all values
t = _.map(t, function(i,v) return v*2 end)

The code below does the exact same thing, but uses chaining:

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local _ = require 'moses'
local t = _:chain(_.range(1,20))
  :select(function(i,v) return v%2~=0 end)
  :map(function(i,v) return v*2 end)
  :value()

Or let us consider a dataset of records:

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local logs = {
  {name = 'Allan', timestamp = 00578},  {name = 'John', timestamp = 20578},
  {name = 'Ronald', timestamp = 00579},  {name = 'Ronald', timestamp = 30578},
  {name = 'John', timestamp = 0057},  {name = 'Allan', timestamp = 0678},
  {name = 'Allan', timestamp = 00278},  {name = 'Peter', timestamp = 06578},
  {name = 'Peter', timestamp = 30578},  {name = 'Allan', timestamp = 0878},
  {name = 'Steve', timestamp = 50578},  {name = 'John', timestamp = 078},
}

We want to find out how many times Allan got connected:

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print(_.count(_.pluck(logs, 'name'), 'Allan')) --> 4

Or find out the max timestamp:

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print(_.max(_.pluck(logs, 'timestamp'))) --> 578

Or get the list of the unique visitors to the database:

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_.each(_.unique(_.pluck(logs, 'name')),print) --> 'Allan', 'John', 'Ronald', 'Peter', 'Steve'

or the same list, chaining style:

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_(logs):pluck('name'):unique():each(print) --> 'Allan', 'John', 'Ronald', 'Peter', 'Steve'

Find a complete tutorial here on Moses' API. The documentation is also available online, on in HTML format bundled with the library.

Moses 1.4.0 : source | Github | Url

[SiENcE]

Nice!

Now I need a löve database .

[Roland_Yonaba]

Hi all,

Sorry to bring up that old thread, I just did not want to create a new one.
This library have been updated to version 2.1.0, which adds a lots of new features, changes and fixes.
Feel free to peek at the tutorial, or the documentation. Project page can be found here.

Hope you like it.