Extract, Transform and Load (ETL) Data from between homogeneous or heterogeneous data sources.
npm install node-etlExtract, Transform and Load (ETL) Data from between homogeneous or heterogeneous data sources.
npm install node-etl --save;
Assume , we have data.txt file with the following content :
``
1 Metouia Gabes TN
2 Laban Riyadh SA
3 Annaba Annaba ALG
9 Mina Mecca SA$3
`js
var ETL = require('node-etl');
var extracted=ETL.extract("./data.txt",
{delimitor:" ",headers:["id","town","city","country"]});
`
Returns an array of objects like below :json`
[
{id:"1",town:"Metouia",city:"Gabes",country:"TN"},
{id:"2",town:"Laban",city:"Riyadh",country:"SA"},
...
]$3
In the previous example , we have the row like {id:1,town:"A",city:"B",country:C} .
What about if we want an output that:
* joins 2nd and 3rd attributes .
* delete id
The solution is to use the following options :
* cols : [[1,2],3]
* cols_headers:
* cols_join
`js
ETL.extract("./data.txt",{
delimitor:" ",
headers:["id","town","city","country"],
cols:[[1,2],3],
cols_headers:["town_city","country"],
cols_join:"|"
});
`
Now, output will be :
`json``
[
{town_city:"Metouia|Gabes",country:"TN"},
{town_city:"Laban|Riyadh",country:"SA"},
...
]
TODO : implemtation & documentation.
TODO : implemtation & documentation.
Copyright (c) 2016 Abdennour TOUMI
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