docs(csv-issues-esm): 366 sample

Author: wdavidw

demo/issues-esm/lib/366.1.js

@@ -0,0 +1,74 @@
+
+import assert from 'assert'
+import { parse } from 'csv-parse'
+import { generate } from 'csv-generate'
+
+// Expected data
+let headers = null
+const third_column = []
+// Fake readable stream
+const parser = generate({
+  high_water_mark: 64 * 64,
+  length: 100,
+  seed: 1
+}).pipe(
+  parse()
+);
+// Intialise count
+let count = 0;
+// Iterate through each records
+for await (const record of parser) {
+  if(count++ === 0){
+    // 1. Extract the columns names from the first line
+    headers = record
+  } else {
+    // 2. Keep in memory only one column out of the all dataset
+    third_column.push(record[2])
+  }
+}
+// Validation
+assert.deepStrictEqual(headers, [
+  'OMH',
+  'ONKCHhJmjadoA',
+  'D',
+  'GeACHiN',
+  'nnmiN',
+  'CGfDKB',
+  'NIl',
+  'JnnmjadnmiNL'
+])
+assert.deepStrictEqual(third_column, [
+  'fENL',             'gGeBFaeAC',        'jPbhKCHhJn',
+  'DKCHjONKCHi',      'LEPPbgI',          'dmkeACHgG',
+  'BDLDLF',           'C',                'kdnmiLENJo',
+  'A',                'PPaeACGfCIkcj',    'oABFaepBFbgGeBFb',
+  'ENJnmj',           'dlhKAABGdlhJnn',   'OPPPbfDK',
+  'PbgGeoACJmjPa',    'LD',               'lfDKBFbhKp',
+  'LE',               'lhIkepCIkdmjbhI',  'jPPadnlhIl',
+  'Ge',               'ONKACJnlhJnnm',    'NLF',
+  'clfCGepBFaeBDL',   'kdmiN',            'AACIlf',
+  'jPbfE',            'gHiN',             'GclgHgG',
+  'CJnmjPbhJoA',      'nlhKCGeABFcjPbh',  'afCJnmiMIleBE',
+  'fDMHgHhJnlhKBF',   'keAADJopDL',       'mjaclgFciO',
+  'LE',               'EONKCH',           'gFckdnnnooABEN',
+  'pCIlgGfCHhKAABDM', 'clgFaeBGdmjPbh',   'jPbgGdnnmjbgGfE',
+  'MGdmkepE',         'GfDLEPa',          'JopEOMGfEOON',
+  'jbfEPPbiMG',       'CHgGeACJnmkclfDK', 'bhJ',
+  'gIjP',             'pDKACIjPaep',      'fDMG',
+  'Kp',               'gFcj',             'DJpBFbgFaeA',
+  'iLFbgGdnl',        'Jn',               'ADJopC',
+  'eACGfCJnmjONLF',   'Ge',               'NKAADJnn',
+  'iMHh',             'PadnlgHgHiMGd',    'ABDJpCIjaclfEMHi',
+  'nlgGf',            'Ge',               'B',
+  'kclgFbgFbhIlgGf',  'jbhIlgHgGf',       'MIjPadnmkclfD',
+  'Hg',               'mjbgH',            'GfDLDKB',
+  'ENLFafCGfEN',      'Gf',               'hKCHiMHgFbiMIl',
+  'biLEPPPafCIkdm',   'hKpD',             'keoBE',
+  'Hg',               'D',                'KACHhKAABDLF',
+  'NKA',              'HiMIkep',          'C',
+  'biMGdmkdnnlgFc',   'CGeAACJnlgG',      'FbgGfCIkdnnl',
+  'PafCHgFbiMIkb',    'LD',               'gGfENLEOP',
+  'IjOPPPa',          'eBFbhJpCIkdlhK',   'IjPbhIlfDMGf',
+  'dnmlfCGepCHhIm',   'nmjPaeoACIkepEM',  'oBDLEOONIlh',
+  'A',                'NKB',              'EOMHhIlhIkd'
+])