1 files changed, 28 insertions, 18 deletions

diff --git a/client/lib/util.js b/client/lib/util.js
index 0685b9d..f33146f 100644
--- a/client/lib/util.js
+++ b/client/lib/util.js
@@ -1,21 +1,21 @@
 import Tone from 'tone'
 import StartAudioContext from './startAudioContext'
 
-const isIphone = (navigator.userAgent.match(/iPhone/i)) || (navigator.userAgent.match(/iPod/i))
-const isIpad = (navigator.userAgent.match(/iPad/i))
-const isAndroid = (navigator.userAgent.match(/Android/i))
-const isMobile = isIphone || isIpad || isAndroid
-const isDesktop = ! isMobile
+export const isIphone = (navigator.userAgent.match(/iPhone/i)) || (navigator.userAgent.match(/iPod/i))
+export const isIpad = (navigator.userAgent.match(/iPad/i))
+export const isAndroid = (navigator.userAgent.match(/Android/i))
+export const isMobile = isIphone || isIpad || isAndroid
+export const isDesktop = ! isMobile
 
 document.body.classList.add(isMobile ? 'mobile' : 'desktop')
 
-const browser = { isIphone, isIpad, isMobile, isDesktop }
+export const browser = { isIphone, isIpad, isMobile, isDesktop }
 
-function choice (a){ return a[ Math.floor(Math.random() * a.length) ] }
-function mod(n,m){ return n-(m * Math.floor(n/m)) }
-function norm(n, min, max){ return (n - min) / (max - min) }
+export function choice (a){ return a[ Math.floor(Math.random() * a.length) ] }
+export function mod(n,m){ return n-(m * Math.floor(n/m)) }
+export function norm(n, min, max){ return (n - min) / (max - min) }
 
-function requestAudioContext (fn) {
+export function requestAudioContext (fn) {
 	if (isMobile) {
     const container = document.createElement('div')
     const button = document.createElement('div')
@@ -55,7 +55,7 @@ function requestAudioContext (fn) {
 	}
 }
 
-function dataURItoBlob(dataURI) {
+export function dataURItoBlob(dataURI) {
   // convert base64 to raw binary data held in a string
   // doesn't handle URLEncoded DataURIs - see SO answer #6850276 for code that does this
   var byteString = atob(dataURI.split(',')[1]);
@@ -79,14 +79,14 @@ function dataURItoBlob(dataURI) {
   return blob;
 
 }
-function ftom(f) {
+export function ftom(f) {
   // return (Math.log(f) - Math.log(261.626)) / Math.log(2) + 4.0
   return 69 + 12 * Math.log2(f / 440)
 }
-function mtof(m) {
+export function mtof(m) {
   return 440 * Math.pow(2, (m - 69) / 12)
 }
-function tap (fn) {
+export function tap (fn) {
   return (e) => {
     if (browser.isMobile) fn()
     else if (e.press) fn()
@@ -95,7 +95,7 @@ function tap (fn) {
 
 /* get minimum and maximum variance from row-to-row */
 
-function get_diff_bounds(rows){
+export function get_diff_bounds(rows){
   const diffs = rows.map(row => {
     const row_min = Math.min.apply(Math, row)
     const row_max = Math.max.apply(Math, row)
@@ -108,7 +108,7 @@ function get_diff_bounds(rows){
 
 /* get minimum and maximum values from a dataset */
 
-function get_bounds(dataset){
+export function get_bounds(dataset){
   let rows = dataset.lines
   // rows.forEach(row => row.shift())
   rows = rows.map(a => a.map(n => parseFloat(n)))
@@ -125,7 +125,17 @@ function get_bounds(dataset){
   return { rows, max, min }
 }
 
+/* transpose a 2D array */
 
-
-export { choice, mod, norm, browser, get_bounds, get_diff_bounds, requestAudioContext, ftom, mtof, tap, dataURItoBlob }
+export function transpose(a) {
+  let i_len = a.length, j_len = a[0].length
+  let T = new Array(i_len)
+  for (let i = 0; i < i_len; i++) {
+    T[i] = new Array(j_len)
+    for (var j = 0; j < j_len; j++) {
+      T[i][j] = a[j][i]
+    }
+  }
+  return T
+}