samples: new cast sample

CHANGELOG.md

@@ -3,6 +3,7 @@
 
 ## Trunk
 
+* samples: new cast sample
 * package: upgrade to babel 7
 * samples: new mixed api samples
 * travis: support Node.js 10

samples/options.cast.js

@@ -0,0 +1,24 @@
+
+const parse = require('../lib/sync')
+const assert = require('assert')
+
+const data = `
+  2000-01-01,date1
+  2050-11-27,date2
+`.trim()
+const records = parse(data, {
+  cast: function(value, context){
+    if(context.index === 0){
+      return `${value}T05:00:00.000Z`
+    }else{
+      return context
+    }
+  },
+  trim: true
+})
+assert.deepEqual(records, [
+  [ '2000-01-01T05:00:00.000Z', {
+    quoting: false, lines: 1, count: 0, index: 1, header: false, column: 1 } ],
+  [ '2050-11-27T05:00:00.000Z', {
+    quoting: false, lines: 2, count: 1, index: 1, header: false, column: 1 } ]
+])