parsing gets wrong if first line begins with a comma

Just check the following:

papa.parse(',"a","b"\n,,"c","d,e",,34,')

The delimiter is the comma, this is OK. But the parsed first line includes just one column that encompasses the whole string ',"a","b"'

The problem seems to happen with the first line only, leading commas in subsequent lines make no hassle.

In the program where I use papaparse, I fixed this problem by adding a leading "" if the string starts with a comma, hence I get

papa.parse('"","a","b"\n,,"c","d,e",,34,')

which works OK

[tuananh]

Ah i get the same issue. is there any workaround ?

[martinffoster]

I tripped across this bug today. This note is to add another test case: it occurs on any row starting with the delimiter. Eg with header: true:

OK:

Column 1,Column 2,Column 3,Column 4
1-1,1-2,1-3,1-4
1-2,2-2,2-3,2-4

error:

Column 1,Column 2,Column 3,Column 4
,1-2,1-3,1-4
1-2,2-2,2-3,2-4

error:

Column 1,Column 2,Column 3,Column 4
1-1,1-2,1-3,1-4
,2-2,2-3,2-4

error:

Column 1,Column 2,Column 3,Column 4
,1-2,1-3,1-4
,2-2,2-3,2-4

The header row always gets correctly parsed. The error is all the same, a variant of:

{type: "FieldMismatch", code: "TooFewFields", message: "Too few fields: expected 4 fields but parsed 1", row: 2}
code: "TooFewFields"
message: "Too few fields: expected 4 fields but parsed 1"
row: 2
type: "FieldMismatch"
__proto__: Object