Row Types

When creating a CSV fast-csv supports a few row formats.

{[string]: any}

You can pass in object to any formatter function if your CSV requires headers the keys of the first object will be used as the header names.

{

a: "a1",

b: "b1",

c: "c1",

}

//Generated CSV

//a,b,c

//a1,b1,c1

string[]

You can also pass in your rows as arrays. If your CSV requires headers the first row passed in will be the headers used.

[

["a", "b", "c"],

["a1", "b1", "c1"]

]

//Generated CSV

//a,b,c

//a1,b1,c1

[string, any][]

This is the least commonly used format but can be useful if you have requirements to generate a CSV with headers with the same column name (Crazy we know but we have seen it).

[

[

["a", "a1"],

["a", "a2"],

["b", "b1"],

["b", "b2"],

["c", "c1"],

["c", "c2"]

]

]

//Generated CSV

//a,a,b,b,c,c

//a1,a2,b1,b2,c1,c2