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

npm install fixy --save

// fixy.parse | Parsing a Fixed Format Input
var fixy = fixy.parse({
	map: [{
		name: "Age",
		width: 2,
		start: 1,
		type: "int"
	}],
	options: {
		fullwidth: 2,
		skiplines: null,
		format: "json" //default
	}
},"30ABC20151201Y950");

// fixy.unparse | Parsing to Fixed Format Output
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"
}]);

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
• Float
  • type : "float"
  • name (Required) | Name of the Column
  • width (Required) | Length of Column
  • start (Required) | Start of Column in Row
  • percision (Required) | Float Percision Value (Ex: 9.20 is 2)
• 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
• String
  • type : "string"
  • name (Required) | Name of the Column
  • width (Required) | Length of Column
  • start (Required) | Start of Column in Row
• 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

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

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)