Software Development Terms Beginning with N
Named Capturing Group (RegExp)
Section titled “Named Capturing Group (RegExp)”The named capturing group operator (?<name>) defines the name of a capturing group.
Named Function
Section titled “Named Function”A named function is a function with a name.
Namespace
Section titled “Namespace”A namespace is a named container (variable) used to store objects of any type.
Negative Lookahead (RegExp)
Section titled “Negative Lookahead (RegExp)”Regular expression’s negative lookahead operator (p(?!sp)) asserts that you wish to find a RegExp pattern that is not followed by another pattern.
Negative Lookbehind (RegExp)
Section titled “Negative Lookbehind (RegExp)”A regular expression’s negative lookbehind operator ((?<!sp)p) asserts that you wish to find a RegExp pattern that is not preceded by another pattern.
Networking
Section titled “Networking”Networking means connecting things.
New Line Character
Section titled “New Line Character”The new line character (\n) helps create line breaks in strings.
node_modules
Section titled “node_modules”node_modules is a folder NPM uses to store all the packages downloaded locally for your project.
Non-Assignment Expression in JavaScript
Section titled “Non-Assignment Expression in JavaScript”A non-assignment expression is a piece of code that does not assign its evaluated value to any variable (or property).
Non-Capturing Group (RegExp)
Section titled “Non-Capturing Group (RegExp)”A regular expression’s non-capturing group operator (?:) allows you to group a pattern without capturing (saving) it.
Non-Greedy Quantifiers (RegExp)
Section titled “Non-Greedy Quantifiers (RegExp)”Non-greedy quantifiers are quantifier operators that will automatically find the shortest part of the given string that matches the specified RegExp pattern.
Non-Primitive Data in JavaScript
Section titled “Non-Primitive Data in JavaScript”Non-primitive data is a JavaScript value that can contain multiple other values.
Non-Restartable Iterator in JavaScript
Section titled “Non-Restartable Iterator in JavaScript”A non-restartable iterator is an object you can use only once. Any subsequent iteration after the first will return nothing.
An example of a non-restartable object is matchAll()’s returned value.
Example
// Match a regular expression's pattern against a string and assign the result to a variable:const result = "Tuesday".matchAll(/day/g);
// Print the result variable's content on the console:console.log(result); // RegExp String Iterator { }
// Print the result variable as an array on the console:for (const arrayVersion of result) { console.log(arrayVersion); // ['day', index: 4, input: 'Tuesday', groups: undefined]}
// Print the result variable as an array on the console again:for (const arrayVersion of result) { console.log(arrayVersion); // undefined}You can see that the second for...of loop statement printed undefined. This is because the result variable contains a non-restartable iterator object which you can use only once.
Non-Word Boundary (RegExp)
Section titled “Non-Word Boundary (RegExp)”Regular expression’s non-word boundary operator (\B) asserts that you wish to find the RegExp pattern that is not at the starting (or ending) boundary of a word.
NOT (RegExp)
Section titled “NOT (RegExp)”A regular expression’s NOT operator ([^abc]) defines the set of characters you do not wish to find in a single character’s position.
NOT Equal to Operator in JavaScript
Section titled “NOT Equal to Operator in JavaScript”The NOT equal to operator (!=) checks if its two operands are not of equal value. If so, the Boolean value true gets returned. Otherwise, the computer will return false.
NOT Operator in JavaScript
Section titled “NOT Operator in JavaScript”The NOT operator (!) is used to negate the Boolean value of an expression. In other words, it converts true to NOT true and false to NOT false.
NOT Strictly Equal to Operator in JavaScript
Section titled “NOT Strictly Equal to Operator in JavaScript”The Not strictly equal to operator (!==) checks if its two operands are strictly not of equal type and equal value. If so, the Boolean value true gets returned. Otherwise, the computer will return false.
NPM (Node Package Manager) is a package manager (an alternative to Yarn) that automatically helps find and execute a specified package.
NPX is node’s package runner tool. It helps to automatically find and execute a specified package.
Null in JavaScript
Section titled “Null in JavaScript”Use null to indicate an intentional absence of a value.
Nullish Coalescing Operator in JavaScript
Section titled “Nullish Coalescing Operator in JavaScript”The nullish coalescing operator (??) checks if its left-hand side operand is undefined or null. If so, it returns its right-hand side operand. Otherwise, it produces its left-hand side operand.
A number is an idea of quantity.
Number in JavaScript
Section titled “Number in JavaScript”A number is a double-precision 64-bit floating-point arithmetic data.
Number() in JavaScript
Section titled “Number() in JavaScript”Number() converts its argument to a Number type or NaN.
Number.isInteger() in JavaScript
Section titled “Number.isInteger() in JavaScript”Number.isInteger() checks if its argument is an integer.
Numeral
Section titled “Numeral”A numeral is the written form of a number.