wodge

a wodge of functional dough

wodge

A collection of useful functions.

var w = require("wodge");

some cross platform symbols (tick and cross)

Merge a list of objects, left to right, into one.

  • object Object a sequence of Object instances to be extended
> w.extend({}, { one: 1, three: 3 }, { one: "one", two: 2 }, { four: 4 });
{ one: 'one',
  three: 3,
  two: 2,
  four: 4 }

Clones an object or array

  • input Object | Array the input to clone

Returns: Object | Array

> date = new Date()
Fri May 09 2014 13:54:34 GMT+0200 (CEST)
> w.clone(date)
{}  // a Date instance doensn't own any properties 
> date.clive = "hater"
'hater'
> w.clone(date)
{ clive: 'hater' }
> array = [1,2,3]
[ 1, 2, 3 ]
> newArray = w.clone(array)
[ 1, 2, 3 ]
> array === newArray
false

Returns a clone of the input object, minus the specified properties

  • object Object the object to clone
  • toOmit string[] an array of property names to omit from the clone

Returns: Object

> w.omit({ one: 1, two: 2, three: 3, four: 4 }, [ "two", "four" ]);
{ one: 1, three: 3 }

escape special regular expression characters

> w.escapeRegExp("(.*)");
'\\(\\.\\*\\)'

Plucks the value of the specified property from each object in the input array

  • arrayOfObjects Object[] the input array of objects
  • the string property to pluck

Returns: Array

> var data = [
...     {one: 1, two: 2},
...     {two: "two"},
...     {one: "one", two: "zwei"},
... ];
undefined
> w.pluck(data, "one");
[ 1, 'one' ]
> w.pluck(data, "two");
[ 2, 'two', 'zwei' ]
> w.pluck(data, "one", "two");
[ 1, 'two', 'one' ]

Returns true if input is a number

> w.isNumber(0)
true
> w.isNumber(1)
true
> w.isNumber(1.1)
true
> w.isNumber(0xff)
true
> w.isNumber(0644)
true
> w.isNumber(6.2e5)
true
> w.isNumber(a)
false
> w.isNumber(NaN)
false
> w.isNumber(Infinity)
false

Returns true if input type is object and not an Array

  • input * the input to test

Returns: boolean

> w.isPlainObject(new Date())
true
> w.isPlainObject({ clive: "hater" })
true
> w.isPlainObject([ 0, 1 ])
false

Takes input and guarantees an array back. Result can be one of three things:

  • puts a single scalar in an array
  • converts array-like object (e.g. arguments) to a real array
  • converts null or undefined to an empty array
  • input * the input value to convert to an array

Returns: Array

> w.arrayify(null)
[]
> w.arrayify(0)
[ 0 ]
> w.arrayify([ 1, 2 ])
[ 1, 2 ]
> function f(){ return w.arrayify(arguments); }
undefined
> f(1,2,3)
[ 1, 2, 3 ]

Returns true if the supplied iterator function returns true for every property in the object

  • object Object the object to inspect
  • iterator function the iterator function to run against each key/value pair, the args are (value, key).

Returns: Boolean

> function aboveTen(input){ return input > 10; }
undefined
> w.every({ eggs: 12, carrots: 30, peas: 100 }, aboveTen)
true
> w.every({ eggs: 6, carrots: 30, peas: 100 }, aboveTen)
false

Runs the iterator function against every key/value pair in the input object

  • object Object the object to iterate
  • callback function the iterator function to run against each key/value pair, the args are (value, key).
> var total = 0;
undefined
> function addToTotal(n){ total += n; }
undefined
> w.each({ eggs: 3, celery: 2, carrots: 1 }, addToTotal)
undefined
> total
6

Convert bytes to human-readable size

  • bytes number the bytes value to convert
  • [precision] number number of decimal places

Returns: string

> w.bytesToSize(10000)
'10 KB'
> w.bytesToSize(10000, 1)
'9.8 KB'
> w.bytesToSize(10000, 2)
'9.77 KB'
> w.bytesToSize(10000, 3)
'9.766 KB'

Cross-platform home directory retriever

> w.getHomeDir()
'/Users/Lloyd'

Create a new string filled with the supplied character

  • fillWith string the fill character
  • len number the length of the output string

Returns: string

> w.fill("a", 10)
'aaaaaaaaaa'
> w.fill("ab", 10)
'aaaaaaaaaa'

Add padding to the right of a string

  • input string the string to pad
  • width number the desired final width
  • [padWith] string the padding character

Returns: string

> w.padRight("clive", 1)
'clive'
> w.padRight("clive", 1, "-")
'clive'
> w.padRight("clive", 10, "-")
'clive-----'

returns true if a value, or nested object value exists in an array

  • array Array the array to search
  • value * the value to search for

Returns: boolean

> w.exists([ 1, 2, 3 ], 2)
true
> w.exists([ { result: false }, { result: false } ], { result: true })
false
> w.exists([ { result: true }, { result: false } ], { result: true })
true
> w.exists([ { result: true }, { result: true } ], { result: true })
true

docs todo

docs todo

docs todo

If the input is an array, returns the input minus the specified values. If the input is an object, it returns a clone of the object minus the specified properties.

  • input Array | Object the input array or object
  • toRemove * a single, or array of values to omit

Returns: Array | Object

> w.without([ 1, 2, 3 ], 2)
[ 1, 3 ]
> w.without([ 1, 2, 3 ], [ 2, 3 ])
[ 1 ]

Returns the first object in the input array with property set to value.

  • objectArray Object[] input array of objects
  • prop string property to inspect
  • val * desired value

Returns: Object | undefined

> w.first([{ product: "egg", stock: true }, { product: "chicken", stock: true }], "stock", true)
{ product: 'egg', stock: true }
> w.first([{ product: "egg", stock: true }, { product: "chicken", stock: true }], "stock", false)
undefined

commonDir returns the directory common to each path in the list

  • files Array An array of file paths to inspect

Returns: string - - A single path ending with the path separator, e.g. "/user/some/folder/"

> files = fs.readdirSync(".").map(function(file){ return path.resolve(file); })
[ '/Users/Lloyd/Documents/75lb/wodge/.DS_Store',
  '/Users/Lloyd/Documents/75lb/wodge/.git',
  '/Users/Lloyd/Documents/75lb/wodge/.gitignore',
  '/Users/Lloyd/Documents/75lb/wodge/.jshintrc',
  '/Users/Lloyd/Documents/75lb/wodge/README.md',
  '/Users/Lloyd/Documents/75lb/wodge/lib',
  '/Users/Lloyd/Documents/75lb/wodge/node_modules',
  '/Users/Lloyd/Documents/75lb/wodge/package.json',
  '/Users/Lloyd/Documents/75lb/wodge/test' ]
> w.commonDir(files)
'/Users/Lloyd/Documents/75lb/wodge/'

merge two arrays into a single array of unique values

> var array1 = [ 1, 2 ], array2 = [ 2, 3 ];
undefined
> w.union(array1, array2)
[ 1, 2, 3 ]
> var array1 = [ { id: 1 }, { id: 2 } ], array2 = [ { id: 2 }, { id: 3 } ];
undefined
> w.union(array1, array2)
[ { id: 1 }, { id: 2 }, { id: 3 } ]
> var array2 = [ { id: 2, blah: true }, { id: 3 } ]
undefined
> w.union(array1, array2)
[ { id: 1 },
  { id: 2 },
  { id: 2, blah: true },
  { id: 3 } ]
> w.union(array1, array2, "id")
[ { id: 1 }, { id: 2 }, { id: 3 } ]

Returns the initial elements which both input arrays have in common

  • a Array first array to compare
  • b Array second array to compare

Returns: Array

> w.commonSequence([1,2,3], [1,2,4])
[ 1, 2 ]

strips special characters, making suitable for storage in a JS/JSON string

  • input string the input

Returns: string

> w.escapeForJSON("hello\nthere")
'hello\\nthere'