Dia antes primera install

node_modules/table-layout/lib/rows.js

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+'use strict'
+const arrayify = require('array-back')
+const Cell = require('./cell')
+const t = require('typical')
+
+/**
+ *
+ */
+class Rows {
+  constructor (rows, columns) {
+    this.list = []
+    this.load(rows, columns)
+  }
+
+  load (rows, columns) {
+    arrayify(rows).forEach(row => {
+      this.list.push(new Map(objectToIterable(row, columns)))
+    })
+  }
+
+  static removeEmptyColumns (data) {
+    const distinctColumnNames = data.reduce((columnNames, row) => {
+      Object.keys(row).forEach(key => {
+        if (columnNames.indexOf(key) === -1) columnNames.push(key)
+      })
+      return columnNames
+    }, [])
+
+    const emptyColumns = distinctColumnNames.filter(columnName => {
+      const hasValue = data.some(row => {
+        const value = row[columnName]
+        return (t.isDefined(value) && !t.isString(value)) || (t.isString(value) && /\S+/.test(value))
+      })
+      return !hasValue
+    })
+
+    return data.map(row => {
+      emptyColumns.forEach(emptyCol => delete row[emptyCol])
+      return row
+    })
+  }
+}
+
+function objectToIterable (row, columns) {
+  return columns.list.map(column => {
+    return [ column, new Cell(row[column.name], column) ]
+  })
+}
+
+/**
+ * @module rows
+ */
+module.exports = Rows