Meta-characters. There are special characters in regular expressions, some of them include: d matches any digit, equivalent to [0-9]; D matches any character that’s not a digit, equivalent to ...

The latest JavaScript specification standardizes a well-balanced and thoughtful set of features, including the built-in ...

The array may have other indexes, besides 0 if a part of the regular expression is enclosed in parentheses. We'll cover that in the chapter info:regexp-groups. And, finally, if there are no matches, ...

Use popular 'grammar of data' syntax to filter and subset your two-dimensional JavaScript arrays and more. Here's how to use Arquero for data wrangling in Observable JavaScript and Node.js.