digitalmars.D.learn - How to split a string to a 2D array
I want to convert a string like " a,b<br/>1, 2<br/>3<br/> " to a 2D array like: [["a", "b"], ["1", "2"], ["3", "" ]] auto html = " a,b<br/>1, 2<br/>3<br/> "; auto rows = html.strip.chomp("<br/>").split("<br/>"); string[][] data; rows.each!(a => data ~= a.split(",")); string[][] result = data.map!(a => a.padRight("", data[0].length).map!(b => b.strip)).array; but the result is not a string[][]: Error: cannot implicitly convert expression `array(map(data))` of type `MapResult!(__lambda2, Result)[]` to `string[][]`
Feb 23 2018
On Saturday, 24 February 2018 at 07:51:27 UTC, Domain wrote:I want to convert a string like " a,b<br/>1, 2<br/>3<br/> " to a 2D array like: [["a", "b"], ["1", "2"], ["3", "" ]] auto html = " a,b<br/>1, 2<br/>3<br/> "; auto rows = html.strip.chomp("<br/>").split("<br/>"); string[][] data; rows.each!(a => data ~= a.split(",")); string[][] result = data.map!(a => a.padRight("", data[0].length).map!(b => b.strip)).array; but the result is not a string[][]: Error: cannot implicitly convert expression `array(map(data))` of type `MapResult!(__lambda2, Result)[]` to `string[][]`And why this not compile: rows.each!(a => data ~= a.split(",").map!(b => b.strip).padRight("", 2)); Error: cannot deduce function from argument types !()(string[]), candidates are: C:\D\dmd2\windows\bin\..\..\src\phobos\std\algorithm\iteration.d(899): C:\D\dmd2\windows\bin\..\..\src\phobos\std\algorithm\iteration.d(934):
Feb 24 2018
On Saturday, 24 February 2018 at 08:59:46 UTC, Domain wrote:On Saturday, 24 February 2018 at 07:51:27 UTC, Domain wrote:OK, this compile: rows.each!(a => data ~= a.split(",").map!(b => b.strip).padRight("", 2).array);[...]And why this not compile: rows.each!(a => data ~= a.split(",").map!(b => b.strip).padRight("", 2)); Error: cannot deduce function from argument types !()(string[]), candidates are: C:\D\dmd2\windows\bin\..\..\src\phobos\std\algorithm\iteration.d(899): C:\D\dmd2\windows\bin\..\..\src\phobos\std\algorithm\iteration.d(934):
Feb 24 2018
On Saturday, 24 February 2018 at 09:06:09 UTC, Domain wrote:On Saturday, 24 February 2018 at 08:59:46 UTC, Domain wrote:FYI: Idiomatic D would be to avoid allocations (faster!). An example: ``` auto html = " a,b<br/>1, 2<br/>3<br/> "; auto rows = html.strip.splitter("<br/>").filter!(not!empty).map!(a => a.splitter(",")); rows.writeln; ``` https://run.dlang.io/is/LC7Sog If you really, really need a 2d array you can always do so if required at the end: ``` auto arr2d = rows.map!array.array; ``` But please keep in mind that you ideally avoid the allocations in the first place.On Saturday, 24 February 2018 at 07:51:27 UTC, Domain wrote:OK, this compile: rows.each!(a => data ~= a.split(",").map!(b => b.strip).padRight("", 2).array);[...]And why this not compile: rows.each!(a => data ~= a.split(",").map!(b => b.strip).padRight("", 2)); Error: cannot deduce function from argument types !()(string[]), candidates are: C:\D\dmd2\windows\bin\..\..\src\phobos\std\algorithm\iteration.d(899): C:\D\dmd2\windows\bin\..\..\src\phobos\std\algorithm\iteration.d(934):
Feb 24 2018