Skip to content
Permalink
d028a1b0f2
Switch branches/tags

Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
Go to file
 
 
Cannot retrieve contributors at this time
100 lines (90 sloc) 2.48 KB
function isObject (o, allowArray) {
return o && 'object' === typeof o && (allowArray || !Array.isArray(o))
}
function isBasic (b) {
return 'string' === typeof b || 'number' === typeof b
}
function get (obj, path, dft) {
if(!isObject(obj, true)) return dft
if(isBasic(path)) return obj[path]
for(var i = 0; i < path.length; i++) {
if(null == (obj = obj[path[i]])) return dft
}
return obj
}
function isNonNegativeInteger (i) {
return Number.isInteger(i) && i >= 0
}
function set (obj, path, value) {
if(!obj) throw new Error('libnested.set: first arg must be an object')
if(isBasic(path)) return obj[path] = value
for(var i = 0; i < path.length; i++)
if(i === path.length - 1)
obj[path[i]] = value
else if(null == obj[path[i]])
obj = (obj[path[i]] = isNonNegativeInteger(path[i+1]) ? [] : {})
else
obj = obj[path[i]]
return value
}
function each (obj, iter, includeArrays, path) {
path = path || []
//handle array separately, so that arrays can have integer keys
if(Array.isArray(obj)) {
if(!includeArrays) return false
for(var k = 0; k < obj.length; k++) {
//loop content is duplicated, so that return works
var v = obj[k]
if(isObject(v, includeArrays)) {
if(false === each(v, iter, includeArrays, path.concat(k)))
return false
} else {
if(false === iter(v, path.concat(k))) return false
}
}
}
else {
for(var k in obj) {
//loop content is duplicated, so that return works
var v = obj[k]
if(isObject(v, includeArrays)) {
if(false === each(v, iter, includeArrays, path.concat(k)))
return false
} else {
if(false === iter(v, path.concat(k))) return false
}
}
}
return true
}
function map (obj, iter, out, includeArrays) {
var out = out || Array.isArray(obj) ? [] : {}
each(obj, function (val, path) {
set(out, path, iter(val, path))
}, includeArrays)
return out
}
function paths (obj, incluedArrays) {
var out = []
each(obj, function (_, path) {
out.push(path)
}, incluedArrays)
return out
}
function id (e) { return e }
//note, cyclic objects are not supported.
//will cause an stack overflow.
function clone (obj) {
if(!isObject(obj, true)) return obj
var _obj
_obj = Array.isArray(obj) ? [] : {}
for(var k in obj) _obj[k] = clone(obj[k])
return _obj
}
exports.get = get
exports.set = set
exports.each = each
exports.map = map
exports.paths = paths
exports.clone = clone
exports.copy = clone