Make .csv files from arrays in Scala -

-

i have 2 tuples in scala of following form:

val array1 = (bucket1, seq((datea, amount11), (dateb, amount12), (datec, amount13)))  val array2 = (bucket2, seq((datea, amount21), (dateb, amount22), (datec, amount23)))

what quickest way make .csv file in scala such that:

  1. date* pivot.
  2. bucket* column name.
  3. amount* fill table.

it needs this:

dates______________bucket1__________bucket2

datea______________amount11________amount21

dateb______________amount12________amount22

datec______________amount13________amount23

you can make shorter chaining operations, :

scala> val array1 = ("bucket1", seq(("datea", "amount11"), ("dateb", "amount12"), ("datec", "amount13")))  array1: (string, seq[(string, string)]) =           (bucket1,list((datea,amount11), (dateb,amount12), (datec,amount13)))  scala> val array2 = ("bucket2", seq(("datea", "amount21"), ("dateb", "amount22"), ("datec", "amount23"))) array2: (string, seq[(string, string)]) =            (bucket2,list((datea,amount21), (dateb,amount22), (datec,amount23)))  // single array work scala> val arrays = list(array1, array2) arrays: list[(string, seq[(string, string)])] = list(           (bucket1,list((datea,amount11), (dateb,amount12), (datec,amount13))),           (bucket2,list((datea,amount21), (dateb,amount22), (datec,amount23)))         ) 
// split between buckets , values scala> val (buckets, values) = arrays.unzip buckets: list[string] = list(bucket1, bucket2) values: list[seq[(string, string)]] = list(           list((datea,amount11), (dateb,amount12), (datec,amount13)),           list((datea,amount21), (dateb,amount22), (datec,amount23))         )  // format data // note not keep 'datex' order scala> val grouped = values.flatten                            .groupby(_._1)                            .map { case (date, list) => date::(list.map(_._2)) } grouped: scala.collection.immutable.iterable[list[string]] = list(           list(datec, amount13, amount23),            list(dateb, amount12, amount22),           list(datea, amount11, amount21)         )  // join everything, , add "dates" column in front of buckets scala> val table = ("dates"::buckets)::grouped.tolist table: list[list[string]] = list(           list(dates, bucket1, bucket2),           list(datec, amount13, amount23),           list(dateb, amount12, amount22),           list(datea, amount11, amount21)         )  // join rows ',' , lines "\n" scala> val string = table.map(_.mkstring(",")).mkstring("\n") string: string = dates,bucket1,bucket2 datec,amount13,amount23 dateb,amount12,amount22 datea,amount11,amount21

Comments

Post a Comment

Popular posts from this blog

matlab - "Contour not rendered for non-finite ZData" -

-
i'm trying plot frequency characteristic equation using ezplot, matlab gives following warning, "contour not rendered non-finite zdata". have used command plot frequency equations warning , plot display empty , not change axis range well. can please help. appreciated. here's code i'm using. % transfer matrix case-i, thin rotor clear all; clc; ei = 1626; l = 0.15; m = 0.44108; = 2.178*10^-4; i_p = 2.205*10^-5; itr = 0.24; i_pr = 0.479; syms p n; f = [1 l*1i l^2/(2*ei)*1i l^3/(6*ei); 0 1 l/ei -l^2/(2*ei)*1i; 0 0 1 -l*1i; 0 0 0 l]; p = [ 1 0 0 0; 0 1 0 0; 0 -it*p^2+i_p*n*p 1 0; -m*p^2 0 0 1]; p_r = [1 0 0 0; 0 1 0 0; 0 -itr*p^2+i_pr*n*p 1 0; -m*p^2 0 0 1]; = f*p*f*p*f*p*f; b = p_r*f*p*f*p*f; r = a(1,2)/a(1,4); a12_p = 0; a22_p = a(2,2)-r*a(2,4); a32_p = a(3,2)-r*a(3,4); a42_p = a(4,2)-r*a(4,4); ap(2,2) = a22_p; ap(3,2) = a32_p; ap(4,2) = a42_p; ap(4,4) = 1; c = b*ap; m = [c(3,2) c(3,4); c(4,2) c(4,...
Read more

delphi - Indy UDP Read Contents of Adata -

-
i using indy udp server read string of data. however, not know how work adata parameter. can around converting binary using bytetobin function below , convert hex using bintohex1 . feel stupid , works slow. know how can directly results without 2 conversions? thanks!! here codes: procedure tform1.idudpserver1udpread(athread: tidudplistenerthread; const adata: tidbytes; abinding: tidsockethandle); var buf: tidbytes; buffer: string; data_received: string; begin if bytestostring(adata) <> 'hello' begin buffer := hextostring('00'); setlength(buf, length(buffer)); copytidstring(buffer, buf, 0); abinding.sendto(abinding.peerip, abinding.peerport, buf); data_received := bintohex1(bytetobin(adata[1]) + bytetobin(adata[2]) + bytetobin(adata[3]) + bytetobin(adata[4]) + bytetobin(adata[5]) + bytetobin(adata[6]) + bytetobin(adata[7]) + bytetobin(adata[8]) + bytetobin(adata[9]) + bytetobin(adata[10]) + bytetobin(adata[11...
Read more

javascript - Any ideas when Firefox is likely to implement lengthAdjust and textLength? -

-
any ideas when firefox implement lengthadjust andtextlength?..... working svg application. lengthadjust , textlength working fine in chrome not working in fire fox . <svg viewbox = "0 0 500 300" version = "1.1"> <defs> <path id="s3" d="m 10,90 q 100,15 200,70" /> </defs> <g> <text font-size = "20"> <textpath xlink:href="#s3" textlength="205"> short text</textpath> </text> <use xlink:href="#s3" fill="none" stroke="black" stroke-width="1"/> </g> </svg> this implemented in firefox text elements (not textpath or tspan) in case that's ok though can move attribute text element. <svg viewbox = "0 0 500 300" version = "1.1"> <defs> ...
Read more