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    <p>That is a nice specification, a great place to start! </p> <p>Remember that Google Apps Script is, to a large extent, JavaScript. If you extend your searching into JavaScript solutions, you'll find <a href="https://stackoverflow.com/search?q=%5Bjavascript%5D%20sort%20array%20multiple%20fields">plenty of examples of array sorts</a> here on SO.</p> <p>As it happens, much of what you need is in <a href="https://stackoverflow.com/questions/14569747/script-to-copy-and-sort-form-submission-data/20485809#20485809">Script to copy and sort form submission data</a>. You don't need the trigger part, but the approach to sorting can be easily adapted to handle multiple columns.</p> <p>The workhorse here is the comparison function-parameter, which is used by the JavaScript <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/sort" rel="nofollow noreferrer">Array.sort() method</a>. It works through the three columns you've indicated, with ascending or descending comparisons. The comparisons used here are OK for Strings, Numbers and Dates. It could be improved with some cleaning up, or even generalized, but it should be pretty fast as-is.</p> <pre><code>function sortMySheet() { var sheet = SpreadsheetApp.getActiveSheet(); var dataRange = sourceSheet.getDataRange(); var data = dataRange.getValues(); var headers = data.splice(0,1)[0]; // remove headers from data data.sort(compare); // Sort 2d array data.splice(0,0,headers); // replace headers // Replace with sorted values dataRange.setValues(data); }; // Comparison function for sorting two rows // Returns -1 if 'a' comes before 'b', // +1 if 'b' before 'a', // 0 if they match. function compare(a,b) { var priorityCol = 0; // Column containing "Priority", 0 is A var openCol = 1; var projectCol = 2; // First, compare "Priority" A &gt; Z var result = (a[priorityCol] &gt; b[priorityCol] ) ? (a[priorityCol] &lt; b[priorityCol] ? -1 : 0) : 1; if (result == 0) { // "Priority" matched. Then compare "Open" Z &gt; A result = (b[openCol] &gt; a[openCol] ) ? (b[openCol] &lt; a[openCol] ? -1 : 0) : 1; } if (result == 0) { // "Open" matched. Finally, compare "Project" A &gt; Z result = (a[projectCol] &gt; b[projectCol] ) ? (a[projectCol] &lt; b[projectCol] ? -1 : 0) : 1; } return result; } </code></pre>
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    1. POSort Google Spreadsheet With Multiple Criteria Using Script
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    1. COThanks for this beautiful example of array sorting :-) +1 again.
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    2. COI tried to copy/paste it into the script editor but when i hit save, i get this error: "Missing ; before statement. (line 43,..."
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    3. CO@PY_ - there were extra brackets at the end of every ternary statement, leftovers from a final clean-up in the SO editor. Fixed.
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