However, it’s actually being fed a string with those separating commas baked in. Because the primary field values from multiple linked records will be fed to a formula field as a comma-separated list of items-which is the same thing that lookup fields do-it’s often assumed that the formula field is being fed an array. This inconsistency alone led me to create a table to document as much as I could figure out about lookup fields and how they pass data collected from linked records: Airtable - Airtable Field ReferenceĪnother issue is with linked record fields themselves. The problem is in figuring out those rules because they’re not all documented.įor example, lookup fields most often return arrays when queried by a formula, but not always. If you understand the rules for how each field operates, things are easier to set up. There may be inconsistencies across field types, but that doesn’t make them bugs. The things you’re referring to feel more like idiosyncrasies to me. I’m hesitant to cast such a wide net and call all of these behaviors “bugs.” To me bugs are cases where a feature is documented and intended to work one way but it works a completely different way, or just flat-out breaks and doesn’t work at all. So, just go with the approach you like best.Airtable has absolutely no shortage of bugs when it comes to arrays, rollup fields, lookup fields, multi select fields, and much more. However, with small and medium arrays, differences are not significant and difficult to identify. Using the spread operator or the push() method with a loop may be faster than using the concat() method for large arrays. This example uses the push() method with a classic for loop: const arr1 = The example below uses the push() method with the spread operator: const arr1 = You can also use the push() method to append the elements of one array to another. The concat() method creates a new array by merging (concatenating) 2 or more arrays.Įxample: const arr1 = Ĭonst mergedArr = ncat(arr2, arr3) You can use it to merge an arbitrary number of arrays at once.Ĭonst mergedArr = The spread operator allows you to expand an array into individual elements. Show a Custom Context Menu on Right Click Programmatically Disable/Enable a Text Input Get an array of dates between 2 given datesĬonvert a Map object to JSON and vice versa Sorting an Array of Objects by Date Property Truncate the time portion of a date string Get current date time in yyyy/MM/dd HH:mm:ss formatĢ Ways to Convert a String into a Date ObjectĬonvert Timestamp to Date Time and Vice Versa Get the Key of an Object Property by Its ValueĬreate/Access Object Properties with Variable KeysĬhecking if a Key/Value Exists in an ObjectĬreate an Object from Arrays of Keys and ValuesĬonvert an Object to a Query String and Vice Versa Pass a JavaScript Array within a Query String Pass an Array to a Function as multiple Arguments Remove elements that occur in one array from another Remove all occurrences of a value from an arrayĬheck if an array contains a given objectĬonvert an Array to an Object in JavaScriptįind elements in array A but not in array B Update/Replace a Specific Element in an Array How to append/prepend/insert elements to an array Generate an array of random elements with a given length Using Arrow Functions in JavaScript ClassesĬount the occurrences of elements in an array Private, protected, and public class members Use JavaScript classes to model and validate data Generate a random number between Min and Max and exclude a specific numberĬonvert Null, NaN, Undefined, and False to zeroĬalculate Variance and Standard Deviationĭefine a Function with Default Parameters Remove multiple consecutive whitespace characters Remove non-alphanumeric characters from a stringĬheck if a string contains non-alphanumeric characters Remove leading and trailing whitespace from a stringĬheck if a String Starts or Ends With a Substringĭifferent Ways to Generate Random StringsĬonvert a byte array to a hex string and vice versa JavaScript Regular Expressions Cheat SheetĬount the occurrences of each word in a string
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