openFileToUpdate

Description

It opens the file using the "r+" flag. This function is to be used as a dependency/helper for updateFile function. Returns the file descriptor of the open file.

Parameter List	Returns	Rejection Errors
`fileLocationAndName: string` `tuple: Array (optional)`	`Promise<number \|\| Array>`	`StringValidationError`
Related Functions	Function Signature
`openfile` `filterResolutionParam`	`function openFileToUpdate(fileLocationAndName[, tuple]): Promise<number \|\| Array>`

Examples

import { openFileToUpdate } from "puddy-m/lib/fileFunctions";

openFileToUpdate("./foo.txt")
  .then(fileDescriptor=>console.log(fileDescriptor)) // Possible outcome: 19

import { openFileToUpdate } from "puddy-m/lib/fileFunctions";

openFileToUpdate("./foo.txt", [])
  .then(tuple=>openFileToUpdate("./bar.txt", tuple))
  .then(([fd1, fd2])=>console.log("File Descriptor 1: "+ fd1 + " - File Descriptor 2: " + fd2)) // A possible outcome: File Descriptor 1: 19 - File Descriptor 2: 21