Fixy is an npm module for parsing fixed formatted strings/files and unparsing an Array of Objects.

npm install fixy --save

var fixy = fixy.parse({
	map:[{
		name: "Age",
		width: 2,
		start: 1,
		type: "int"
	},{
		name: "Initial",
		width: 3,
		start: 3,
		type: "string"
	}],
	options:{
		fullwidth: 5,
		skiplines: null,
		format: "csv"
	}
}, "21ABC\n22DEF");

var fixy = fixy.parse({
	map:[{
		name: "Name",
		width: 7,
		start: 1,
		type: "string",
		level: "A"
	},{
		name: "Age",
		width: 2,
		start: 1,
		type: "int",
		level: "B"
	}],
	options:{
		skiplines: null,
		levels: {
			"A": {
				nickname: "A",
				start: 0,
				end: 0,
				fullwidth: 7
			},
			"B": {
				nickname: "B",
				start: 1,
				end: 2,
				fullwidth: 2
			}
		}
	}
}, "Steve  \n30");

var fixy = fixy.unparse([{
	name: "Age",
	width: 7,
	padding_position: "end",
	padding_symbol: "#"
},{
	name: "Initial",
	width: 4,
	padding_position: "end",
	padding_symbol: "@"
}], [{
	Age: 30,
	Initial: "SJP"
},{
	Age: 20,
	Initial: "CCS"
}]);

var fixy = fixy.unparse([{
	name: "Name",
	width: 7,
	padding_position: "end",
	level: "A",
},{
	name: "Age",
	width: 3,
	padding_position: "end",
	level: "B"
},{
	name: "Initial",
	width: 4,
	padding_position: "end",
	level: "B"
}], {
	A: [{ Name: "Mike" }],
	B: [{
		Age: 30,
		Initial: "MAS"
	},{
		Age: 20,
		Initial: "SAM"
	}]
}, ["A", "B"]);

A map [array of objects] of the column names, width, starting point, type of value, extra type settings.

• Integer
  • type : "int"
  • name (Required) | Name of the Column
  • width (Required) | Length of Column
  • start (Required) | Start of Column in Row
  • level (Required if Multi Level) | Level Map Name
• Float
  • type : "float" (decimal use allowed but not required)
  • name (Required) | Name of the Column
  • width (Required) | Length of Column
  • start (Required) | Start of Column in Row
  • percision (Optional) | Float Percision Value (Ex: 9.20 is 2) | DEFAULT TO 2 DECIMAL PLACES
  • sybmol (Optional) | Symbol Value (Ex: $9.20) | ONLY AVAILABLE FOR FORMAT = CSV
  • level (Required if Multi Level) | Level Map Name
• Date
  • type : "date"
  • name (Required) | Name of the Column
  • width (Required) | Length of Column
  • start (Required) | Start of Column in Row
  • inputformat (Required) | Format Date Date is Currently In
  • outputformat (Required) | Format Date Date is Returned As
  • level (Required if Multi Level) | Level Map Name
• String
  • type : "string"
  • name (Required) | Name of the Column
  • width (Required) | Length of Column
  • start (Required) | Start of Column in Row
  • level (Required if Multi Level) | Level Map Name
• Boolean
  • type : "bool"
  • name (Required) | Name of the Column
  • width (Required) | Length of Column
  • start (Required) | Start of Column in Row
  • tVal (Required) | String Value of True
  • fVal (Required) | String Value of False
  • level (Required if Multi Level) | Level Map Name

• fullwidth = full length of rows from start to end
• skiplines = optional array of rows to be skipped. May be left null
• format = defaults "json". Valid selections are: json, csv

• skiplines = optional array of rows to be skipped. May be left null

• levels = level map object (see example)

  "LEVELNAME": { nickname: "NameInMap", start: 0, //row start, zero based end: 0, //row end, zero based fullwidth: 7 // row width per level }

A map [array of objects] of the column names, width, starting point, type of value, extra type settings.

• name (Required) | Name of the Key
• width (Required) | Length of Fixed Section
• padding_position (Optional. Default: "start") | Where padding should start ("start" or "end")
• padding_symbol (Optional. Default: space " ") | What empty space should be padded with (any symbol, letter or number)
• level (Required if Multi Level) | Level Map Name

{
	A: [{ Name: "Mike" }],
	B: [{
		Age: 30,
		Initial: "MSP"
	}]
}