Any line is a sequence of characters (elements). Any array is a collection of elements (characters). Each of these designs has its own functionality. The combination of two functionalities allows you to create a new meaning and new opportunities for its processing.
Numerous conditions and cycles are always a complex algorithm. To parse a string (information) into components (JavaScript split) and assemble a string of elements (JavaScript join) is simple, understandable, practical.
Form one
Modern arrays are data sets of various types equipped with extensive functionality. Arrays can contain not only data, but also objects. An object is an independent meaning that contains unique information that is accessible by its own methods.
An object can be represented by a string of characters from which it can be restored to its original form. For the array.join () method, JavaScript provides the inverse of the array.split () method. The first method joins all elements of the array into one character string through the separator, the second method decomposes the string into elements by the separator.
It is not necessary to use the same separator in the second method as in the first. In fact, you can merge data into a single whole according to one algorithm, and disassemble it into elements in another way.
Security objectives (monitoring transactions and user actions) - studying the flow of device data or the dynamics of exchange rates on the exchange - examples of sequences containing “significant” and “not” meaning.
Filtering information is an algorithm, often complex. You can do it easier. Merge by the separator "isolation of the excess" - JavaScript join (), and then parse by another separator that captures the excess - JavaScript split (). Simple, clear, and no need to write a complex filtering algorithm.
Manipulating Data Structures
Arrays have element-oriented functionality: sorting, processing elements according to an algorithm, indexing, and other manipulations. An array can always be turned into a string using the JavaScript join () function.
Depending on the separator used (the separator is not necessarily one character) and depending on the structure of the arrays inside another array, you get a complex string in which the meaning can be interpreted differently.
In each specific case, there are some peculiarities: the meaning of the array and the meaning of the string into which the array should be turned, in order to parse the string using JavaScript splt () and get an array of other meaning.
But the join / split logic can be easily used outside of JavaScript syntax, and this will provide a qualitatively interesting solution.