I often waste a lot of time tracking down stupid bugs that are to do with passing the wrong kind of argument to a function. As you know, JavaScript is not strongly typed, and this […]
Writing Apps Script const scoping problems led to me to wonder how to get exactly which JavaScript features are supported by Apps Script and which are not. By deduction, it seems likely that the current version of […]
Apps Script is based on ES3 JavaScript, with quite a few additions from ES5 and even ES6. In this article we’ll take a look at the implementation of const, and let which were introduced in […]
At the time of writing, the Apps Script JavaScript engine is based on ES3 with a few useful ES5 things added. Much of the rest of the world is at Es6 with Es7 coming along. […]
Sheet and document IDs can be a a handful to manage, and if you want to use a different file you may need to update all the scripts that reference it. The Drive API allows […]
Some of the responses from the GitHub API rely on the answers being in its cache. If you make a request and there is no available cache result, it returns an HTTP code (202) to […]
There are 3 YouTube related advanced services in Google Apps Script. In this post I’ll show you how to get simple stats about the youtube videos in your channel. The API documentation can be a […]
As you know, there isn’t a builtin way to get notified about changes in a host Document from a client-side App. Ideally, there should be some kind of trigger that can be invoked when the […]
The Property store has a limit of 9k on individual property items and, the cache store has 100k. You may also be using other stores for this kind of data with similar limitations. Let’s take […]
It can be hard to notice where two strings are different in the Apps Script logger. We can borrow JsDiff to help with that. I’ll be using the cjsDiff library M9zcCXivXIkjpW_mA_X1Vtiz3TLx7pV4j You can report on […]
Identify Duplicates on Google Drive The problem with Drive is that it’s really easy to have loads of files with the same name spread around in multiple folders on Drive. Here’s how to get a […]
If you use caching in Apps Script (and you should), you might hit the 100k limit on cache sizes. I’ve written about how to get round that by writing several cache entries and linking them […]
Creating a crypto digest of some content is a neat trick used by github (and torrent sharing sites) to know if the content of two files is identical. There are plenty of other uses for […]
One of the problems of measuring script or library usage is the identification of returning users. As you know email addresses or some other identification is not easily accessible (rightly so), and neither should it […]
In Convert JSON to XML I showed how to make XML from JSON. Here’s the opposite. It could be a little more all-encompassing by dealing with dates, and unescaping, but for now, this should serve […]
There are a few examples of XML to JSON conversion around, but not so many going the other way. In case you need to convert Apps Script objects to XML, here’s a snippet to do […]
Sometimes you need to make up some random data for a sheet or a docs table just for testing in some volume. I use this snippet to generate random data in the right shape. You’ll […]
If you throw a custom error, it can be hard to track down where it came from if you’re using a common function. In Reporting file, function and line number in Apps Script I showed […]
In this article we’ll take a look at Base64, what it is and why we use it. Although there are Base64 encoding and decoding available in the Apps Script Utilities service, we’ll write an encoder […]
If you liked Reporting file, function and line number in Apps Script, you’ll probably also like this one. This shows how to get some properties about an object in apps script, and can be useful […]
If you are using the Logger extensively, it’s sometimes hard to track where the log message is coming from. It would be useful to display line number, file name and function that provoked the log. […]
If you getValues from a spreadsheet, and those values contain dates, and you expect to be able to send them to an add-on, then you’ll find you get an error about unsupported data types. This […]
Here’s an interesting idea. Let’s say you want to use Google Apps Script as the master for a library of functions (since you can’t use script tags in apps script) that you would like to […]
This page is still being written. In Pseudo binding in HTML service I showed how to simulate Sheets cell binding in an Apps Script Add-on. Office for apps includes binding out of the box. We’ll use that […]
It’s quite irritating that you can only access functions that are global from the client side when running Html service. Except there is a way round it using regular JavaScript. Let’s say you have a […]
If you use any of my webapps that return json data, there will be an option to return jsonp instead. Here’s a quick summary of what it’s all about. Same-Origin security policy. Since JSON is […]
What is CORS In summary it’s a way of securely enabling a client side app to exchange data with a server that is not in the same domain – which is of course against cross […]
If you are reading this, I guess you are familiar with this error message
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XMLHttpRequest cannot load http://dl.dropbox.com/u/14196218/Share/somedata.json. Origin null is not allowed by Access-Control-Allow-Origin. |
This is of course the same origin policy that prevents you being able to access jSon data that is stored on a […]
You probably read the announcement that Parse.com is closing its hosting service. This is probably a good time to look at firebase, but if you are using my dbabstraction library, you can change to some other backend […]
There are many rates and quotas in the Google Apps Script environment. One of the usual ways of dealing with it is to sleep between instructions, but that seems to be a rather blunt instrument. […]
I’ve found that I have completed applications lying around the site, with no good way of finding them. I’m starting this section to walk through complete Apps Script Applications, which cover a number of concepts. […]
The User property service is handy to store user specific properties in, but it can also be used to assign a unique anonymous reference to users and track their visits. Here’s a useful namespace in […]
There are many Google Apps Script projects and snippets scattered around this site. I’m going to try to organize them in this page, but it will take a while. If you find something on the […]
In using Google Apps Script as a jSONP proxy, I covered how you could use GAS to get over javaScript same domain restrictions. If you need to access jSon data from javaScript, jQuery and so […]
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