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list-of-functions.md

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  • 01-00 System

  • 01-01 Info from CPU: os.cpus()

  • 01-02 Info from Operating System: os.version() and os.platform()

  • 01-03 Info from current user: os.userInfo()

  • 01-04 Access to environment variables: process.env

  • 01-05 Get the amount of free memory in bytes (as integer): os.freemem()

  • 01-06 Get the amount of total memory available in bytes (as integer): os.totalmem()

  • 01-07 The load average of CPU: os.loadavg()

  • 01-08 Network interfaces information: os.networkInterfaces()

  • 01-09 Stop the execution with a proper status code: process.exit()

  • 01-10 Get temporary directory: os.tmpdir()

  • 01-11 Get monotonic time: performance.now()

  • 02-00 Array

  • 02-01 Create a string from an array: join()

  • 02-02 Check if the array includes a certain value: includes()

  • 02-03 Check if a key exists in the array: in

  • 02-04 Concat arrays: concat()

  • 02-05 Concat arrays via destructuring

  • 02-06 Remove duplicate values in an array via Set()`

  • 02-07 Generate and fill a new array fill()

  • 02-08 Filtering elements: filter()

  • 02-09 Testing all elements: every()

  • 02-10 Testing at least one element: some()

  • 02-11 Mapping new array: map()

  • 02-12 Reduce array: reduce()

  • 02-13 Modify array: splice()

  • 02-14 Extracting elements: slice()

  • 02-15 Flat nested array: flat()

  • 02-16 Find the index of an element that matches a condition findIndex()

  • 02-17 Allows accessing elements using positive or negative indices at()

  • 02-18 First maps each element using a mapping function, then flattens the result into a new array flatMap()

  • 02-19 Returns a new Array Iterator object that contains the keys (indices) for each index in the array keys()

  • 02-20 Returns a new Array Iterator object that contains key/value pairs for each index in the array entries() #72

  • 02-21 returns the last index of the element in the array that satisfies the provided testing function findLastIndex()

  • 02-22 returns the last element in the array that satisfies the provided testing function findLast()

  • 02-23 Shallow copies part of an array to another location in the same array copyWithin()

  • 02-25 returns a new Array Iterator object that contains the values for each index in the array values() #70

  • 03-00 Variables, constants, Object

  • 03-01 Get variable type: typeof

  • 03-02 Portable directory separator: path.sep

  • 03-03 Portable end of line: os.EOL

  • 03-04 Gets the properties of the given object: getOwnPropertyNames()

  • 03-05 Getting all the Object properties/attributes: keys()

  • 03-06 Object values: values()

  • 03-07 Object entries: entries()

  • 03-08 Object freeze: freeze()

  • 03-09 Object seal: seal()

  • 03-10 Object is frozen: isFrozen()

  • 03-11 Object is sealed: isSealed()

  • 03-12 Groups elements of an array based on a function, either returning an object groupBy() #64

  • 03-13 Transforms a list of key-value pairs into an object: fromEntries()

  • 04-00 Functions

  • 05-00 Strings

  • 05-01 Concatenating strings: concat()

  • 05-02 Padding Strings: padStart() padEnd()

  • 05-03 String includes: includes()

  • 05-04 Slicing strings: slice()

  • 05-05 Finding index: indexOf()

  • 05-06 Repeating a string: repeat()

  • 05-07 Splitting a String into an Array: split()

  • 05-08 Upper case: toUpperCase()

  • 05-09 Lower case: toLowerCase()

  • 05-10 Start with: startWith()

  • 05-11 Replaces all occurrences of a substring in a string: replaceAll()

  • 05-12 Removes whitespace from the beginning or end of a String trimStart() and trimEnd()

  • 06-00 Files

  • 06-01 Current directory: process.cwd() #53