Add CSVToJSON

snippets/CSVToJSON.md

@@ -0,0 +1,24 @@
+### CSVToJSON
+
+Converts a comma-separated values (CSV) string to a 2D array of objects.
+The first row of the string is used as the title row.
+
+Use `Array.slice()` and `Array.indexOf('\n')` and `String.split(delimiter)` to separate the first row (title row) into values.
+Use `String.split('\n')` to create a string for each row, then `Array.map()` and `String.split(delimiter)` to separate the values in each row.
+Use `Array.reduce()` to create an object for each row's values, with the keys parsed from the title row.
+Omit the second argument, `delimiter`, to use a default delimiter of `,`.
+
+```js
+const CSVToJSON = (data, delimiter = ',') => {
+  const titles = data.slice(0,data.indexOf('\n')).split(delimiter);
+  return data.slice(data.indexOf('\n')+1).split('\n').map(v => {
+    const values = v.split(delimiter);
+    return titles.reduce((obj, title, index) => ((obj[title] = values[index]), obj), {});
+  });
+}
+```
+
+```js
+CSVToJSON('col1,col2\na,b\nc,d'); // [{'col1': 'a', 'col2': 'b'}, {'col1': 'c', 'col2': 'd'}];
+CSVToJSON('col1;col2\na;b\nc;d', ';'); // [{'col1': 'a', 'col2': 'b'}, {'col1': 'c', 'col2': 'd'}];
+```

tag_database

@@ -40,6 +40,7 @@ countOccurrences:array
 createElement:browser,utility
 createEventHub:browser,event,advanced
 CSVToArray:string,array,utility
+CSVToJSON:string,array,object,advanced
 currentURL:browser,url
 curry:function,recursion
 debounce:function

test/CSVToArray/CSVToArray.js

@@ -1,3 +1,6 @@
 const CSVToArray = (data, delimiter = ',', omitFirstRow = false) =>
-data.slice(omitFirstRow ? data.indexOf('\n')+1 : 0).split('\n').map(v => v.split(delimiter));
+data
+.slice(omitFirstRow ? data.indexOf('\n') + 1 : 0)
+.split('\n')
+.map(v => v.split(delimiter));
 module.exports = CSVToArray;

test/CSVToJSON/CSVToJSON.js

@@ -0,0 +1,8 @@
+const CSVToJSON = (data, delimiter = ',') => {
+const titles = data.slice(0,data.indexOf('\n')).split(delimiter);
+return data.slice(data.indexOf('\n')+1).split('\n').map(v => {
+const values = v.split(delimiter);
+return titles.reduce((obj, title, index) => ((obj[title] = values[index]), obj), {});
+});
+}
+module.exports = CSVToJSON;

test/CSVToJSON/CSVToJSON.test.js

@@ -0,0 +1,12 @@
+const expect = require('expect');
+const CSVToJSON = require('./CSVToJSON.js');
+
+test('CSVToJSON is a Function', () => {
+  expect(CSVToJSON).toBeInstanceOf(Function);
+});
+test('CSVToJSON works with default delimiter', () => {
+  expect(CSVToJSON('col1,col2\na,b\nc,d')).toEqual([{'col1': 'a', 'col2': 'b'}, {'col1': 'c', 'col2': 'd'}]);
+});
+test('CSVToJSON works with custom delimiter', () => {
+  expect(CSVToJSON('col1;col2\na;b\nc;d', ';')).toEqual([{'col1': 'a', 'col2': 'b'}, {'col1': 'c', 'col2': 'd'}]);
+});