Merge pull request #17 from ttsukagoshi/Update-README-for-Fixed-Line-…

…Break

Update readme for fixed line break

README.md

@@ -18,6 +18,7 @@ Edit your spreadsheet in any way you want to. If you want to change the sheet na
 - The default value for the field (column) name of recipient email address is set to `Email`; change the value of `RECIPIENT_COL_NAME` in sheet `Config` to suit your needs
 - Changing sheet name of `Config` is not recommended unless you are familiar with Google Apps Script and can edit the relevant section of the script.
 - The lower-case letter `i` is reserved as part of the nested merge function, as described below, and cannot be used for a column name.
+- Line breaks within a spreadsheet cell will be reflected in the plain text version of the merged mail, but not in the HTML version.
 
 ### 3. Create a template draft on Gmail
 Create a Gmail draft to serve as the template. By default, the merge fields are specified by double curly brackets, i.e., `Dear {{Name}},... `. The field names should correspond with the column names of the spreadsheet (case-sensitive). If HTML mail is enabled, text styles of the draft template will be reflected on the personalized emails.

src/mailMerge.js

@@ -167,6 +167,18 @@ function sendPersonalizedEmails_(draftMode = true, config = CONFIG) {
   }
 }
 
+/**
+ * Process each element of an array with String.prototype.replace()
+ * @param {array} array Array containing values to replace.
+ * @param {string|RegExp} searchValue A RegExp object or literal, or string to be replaced by replaceValue
+ * @param {string} replaceValue String to replace the searchValue.
+ * @return {array} Array whose element(s) are replaced.
+ */
+function arrReplace_(array, searchValue, replaceValue) {
+  let replacedArray = array.map(value => value.replace(searchValue, replaceValue));
+  return replacedArray;
+}
+
 /**
  * Returns an object of configurations from spreadsheet.
  * @param {string} configSheetName Name of sheet with configurations. Defaults to 'Config'.