| 'use strict'; | |
| // Request and response object drills | |
| // ================================== | |
| const express = require('express'); | |
| const app = express(); | |
| // use express middleware to parse the request body and add it to the request object | |
| // don't worry, you'll learn all about middleware in the next assignment! |
Scope is part of the reasoning of how code works in regards to variables. Global scope allows accessing variables everywhere, whereas local scope is bound to the block at which it is defined.
Global variables are avoided to prevent unintended side effects.
| #Convert JSON file to an object | |
| $JsonParameters = ConvertFrom-Json -InputObject $content | |
| #Create new PSObject with no properties | |
| $oData = New-Object PSObject | |
| #Loop through properties of the $JsonParameters.parameters object, and add them to the new blank object | |
| $JsonParameters.parameters.psobject.Properties.Name | | |
| ForEach{ | |
| Add-Member -InputObject $oData -NotePropertyName $_ -NotePropertyValue $JsonParameters.parameters.$_.Value |
| function getTokens(rawString) { | |
| // This first function does the following things: | |
| // - Takes a raw string | |
| // - Converts the entire string to lowercase | |
| // - Splits all words into an array that do not match a single character specified between the [] | |
| // - Removes falsy items | |
| // - Sorts the array of strings in place | |
| return rawString.toLowerCase().split(/[ ,!.";:-]+/).filter(Boolean).sort(); | |
| } |
Scope determines the level at which variables can be accessed and modified. Scope is determined by the scope chain, which is the standard for determining the scope of variables.
Local scope refers to the lowest level of the scope chain, and typically refers to block level (ie, inside levels of a function. Global scope refers to the highest level of the scope chain, and can be accessed across not only the current file, but all files across the app.
Why are global variables avoided?
| min and max (without sort) drill | |
| https://repl.it/@johnatspreadstr/min-and-max-without-sort-drill | |
| average drill | |
| https://repl.it/@johnatspreadstr/average-drill | |
| fizzbuzz drill js | |
| https://repl.it/@johnatspreadstr/fizzbuzz-drill-js |