JSPM

import {} from 'x-utils-es' // (defaults to esm)
import {} from 'x-utils-es/umd' // for browser and commonjs support
const {} require('x-utils-es/umd') // with node support

// browser
<script src="..path/umd"></script>
<script>
    const {...} = window.xutils // get access to all utils
</script>

import { objectSize,last,copyBy,timer,interval,validID,isNumber,isPromise,uniq,isFunction,isObject,isArray,isString,isFalsy,copy,delay,someKeyMatch,exactKeyMatch,head,flatten,trueVal,trueValDeep,trueProp,typeCheck,isEmpty,isError, log,warn,onerror,error, isClass,hasPrototype, isInstance,hasProto, chunks, validDate,stack,errorTrace,resolver } 
from 'x-utils-es' // require(x-utils-es/umd) 



/**
 * - If item is an object with properties, returns key size
 * @param data:any
 * @returns number , amount of keys in the object
 * **/
objectSize({ a: 1, b: 2 }) }) // 2
objectSize([1,2]) // 0



/**
 * - Return first index from up to 2 level array: [[1,2]]
 * @param arr:array
 * @returns top first index
 * **/
head([[{ value: 1 }, { value: 2 }]]) // { value: 1 }
head([[ [1], {value:1} ]]) // [1]
head([1,2]) // 1



/**
 * -Flattens array by one level [[]] > [], [[[]]]> [[]]
 * @param arr:array
 * @returns array
 * **/
flatten([['hello world']]) // ['hello world']


/**
 * -Flattens all array levels to 1 level
 * @param arr:array
 * @returns array
 * **/
flattenDeep([[[['hello world']]]) // ['hello world']



/**
 * - If array, return last index 
 * @param any
 * @returns last index in an array
 * **/
last([{},{},[1], { value: 1 }]) // { value: 1 }


/**
 * - Provide data{} with arrayProp[] references to match
 * @param data:object
 * @param refs:array string array of keys to reference
 * @returns matched copy of the object
 * **/
copyBy({ a: 1, b: 2, c: 3 }, ['a', 'c']) } // {a: 1, c: 3}
copyBy({ a: 1, b: 2, c: 3 }) } // {}
copyBy({}) } // {}



/**
 * - Return copy of provided data. 
 * - Methods will not be copied, only its primitiveValue, based of `typeCheck` evaluation
 * @param any
 * @returns copy of provided data
 * **/
copy({ a: 1, b:function(){} }) //=>  {a:1}
copy([1,2,3]) //=> / [1,2,3]
copy( function(){}) //=>  Function: anonymous
copy(null) //=>  null 
copy(true) //=>  true




/**
 * - If item is a function, return true
 * @param any
 * @returns boolean
 * **/
isFunction(true) // false
isFunction(Promise.resolve) // true


/**
 * - Replacement for setTimeout, same principal, on `time` clears setTimeout 
 * @param function/callback
 * @param time:number
 * **/
timer(() => log('timer called'), 2000)


/**
 * - just like setInterval, calls `every` time/until, and clears interval on `endTime` 
 * @param callback=>
 * @param every:number 
 * @param endTime:number
 * **/
interval(() => log('interval called'), 100, 300)


/**
 * - Return string without space to lowerCase
 * @param string
 * **/
validID('sdfkj 45 AMKD') // sdfkj45amkd



/**
 * - Check if is type of number
 * @param any
 * @returns boolean
 * **/
isNumber(-1) // true
isNumber(NaN) // true
isNumber(true) // false
isNumber([]) // false



/**
 * - Check if provided item is a Promise
 * @param any
 * @returns boolean
 * **/
isPromise(function () { }) // false
isPromise(Promise.resolve()) }) // true



/**
 * - Provide array and return no repeats, (doesnt work with NaN)
 * @param array[]
 * @returns array with uniq values
 * **/
uniq([1, 1, 3, 'a', 'b', 'a', null, null, true, true]) // [1,3,'a','b',null,true]



/**
 * - Check if provided has object properties, and is not an array
 * @param data:any
 * @returns boolean
 * **/
isObject({}) // true
isObject([]) // false
isObject( (new function(){}) ) // true
isObject((function () { })) }) // false
isObject((new class { })) // true
isObject(new Error()) // true
isObject(null) // false


/**
 * - Check if provided is Array.prototype, not an Object.prototype
 * @param data:any
 * @returns boolean
 * **/
isArray([]) // true
isArray({}) // false
isArray(new Array()) // true


/** 
  * - return array in batch specified by size
  * @param {array} arr required
  * @param {number} size required larger then 0
  * @returns arr[]
 */
chunks( [1,2,3,4,5,6] , 2) // [ [ 1, 2 ], [ 3, 4 ], [ 5, 6 ] ]





/**
 * - Check if provided data is a string 
 * @param any
 * @returns boolean
 * **/
isString('') // true
isString(new String()) // true
isString(NaN) // false
isString(new Date()) // false



/**
 * - Check if provided identities match: `['',0 x<1, false, null, undefined,NaN, [],{}]`
 * @param any
 * @returns boolean 
 * **/
isFalsy({}) // true
isFalsy({a:1}) // false
isFalsy([]) // true
isFalsy([1]) // false
isFalsy(true) // false
isFalsy(false) // true
isFalsy(0) // true



/**
 * - Returns promise and resolved with time provided
 * @param time:number
 * **/
async function f() {
    log('delay start')
    await delay(2000)
    log('delay end')
}; f()



/**
 * - Provide object/source, check if ANY key names match, object/source order placement doesn't matter :)
 * @param obj:object
 * @param source:object
 * @returns boolean  true=> when at least 1 key name belongs to either obj/source
 * **/
someKeyMatch({ a: 2, b: 1, c: 2 }, { d: 1, e: 1, a: 1 }) //=>  true



/**
 * - Provide object/source, check if ALL key names match, object/source order placement doesn't matter :)
 * @param obj:object
 * @param source:object
 * @returns boolean  true=> when ALL key names match each other
 * **/
exactKeyMatch({ a: 2, b: 1, c: 2 }, { c: 1, a: 1, b: 1 }) //=>  true
exactKeyMatch({ a: 2, b: 1 }, { c: 1, a: 1, b: 1 }) //=> false
exactKeyMatch({ a: 2, b: 1 }, { c: 1, d: 1}) //=>  false
exactKeyMatch({}, { c: 1, d: 1}) //=>  false
exactKeyMatch(['a','b','c'], { c: 1, d: 1}) //=> false



/**
 * - Provide mixed array, returns only positives entities, 
 *   excluding :`[0, -1, x<1, null,false,{},undefined,'',[],NaN]`.
 *   Does not change structure of data, uses `isFalsy()` to eval conditions.
 * @param arr:array must provide array
 * @returns mixed array with positive entities in same order 
 * **/
trueVal([-1, 0,1 {}, "hello", [], { name: 'jack' }, false, null, NaN, undefined,true]) 
//=> [1,'hello',{ name: 'jack' },true]


/**
 * - Same as `trueVal` except, it goes 2 levels deep: [[1,[]]], 
 *   nested empty arrays and objects will also be filtered out. Does not change structure of valid data, 
 *   Uses `isFalsy` to eval conditions.
 * @param arr:array must provide array
 * @returns mixed array with positive entities in same index order, 2 levels deep
 * **/
trueValDeep([1, 0, [], {}, "hello", [0, undefined, -1, false, NaN, 1], { name: 'jack' }, false, null, undefined])
//=> [ 1, 'hello', [ 1 ], { name: 'jack' } ] }



/**
 * - Return new object with only true entities `{prop:values,...}`, 
 *   ignoring top level: `{a:NaN,b:0,c:false,d:-1,e:NaN,f:[],g:{},h:undefined,j:''}`. 
 *   Does not change structure of valid data. Uses `isFalsy` to eval conditions
 * @param obj:object
 * @returns new object with positive entities
 * **/
trueProp({ a: NaN, b: 0, c: false, d: -1, e: NaN, f: [], g: 'hello', h: {}, i: undefined, j:'' })
//=> {g: 'hello'}


/**
 * - Evaluate given data and return type/value object. 
 *   `value` is not the actual data, but an index from `-<+`. 
 *   If array (index is incremented), if object (keys are incremented). You get the idea!
 * @param data:anyType
 * @param standard:boolean:true by default evaluation is using standard javascript return typeof , 
 *        when standard=false, will use user friendly mixed/types: `date,NaN,promise,array,typeof/s`
 * @returns { "type": date,NaN,promise,array,typeof/s, value: number, primitiveValue }
 * **/
typeCheck({}) // {type:object, value:0, primitiveValue: Object() }
typeCheck({a:1,b:2}) // {type:'object', value:2, primitiveValue: Object() }
typeCheck([2,3],false) // {type:'array', value:2, primitiveValue: Object() }
typeCheck(Date,false) // {type:'date', value:1, primitiveValue: Date() }
typeCheck(2) // {type:'number', value:2, primitiveValue: Number() }
typeCheck(false) // {type:'boolean', value:0, primitiveValue: Boolean() }
typeCheck(true) // {type:'boolean', value:1, primitiveValue: Boolean() }
typeCheck(null,false) // {type:'null', value:0, primitiveValue: Object() }
typeCheck(null) // {type:'object', value:0, primitiveValue: Object() }
typeCheck(undefined) // {type:'undefined', value:0, primitiveValue: undefined }
typeCheck(function () { }) // {type:'function', value:1, primitiveValue: Function() }
typeCheck(Promise.resolve(),false) // {type:'promise', value:1, primitiveValue: Function() }
typeCheck(Promise.resolve()) // {type:'function', value:1, primitiveValue: Function() }



/**
 * - Evaluate data contains true identities, and return true when: [NaN,'',x<1 , false, null, undefined,NaN,{},[]]
 * @param data:any
 * @returns boolean
 * **/
isEmpty({}) // true
isEmpty({a:1}) // false
isEmpty([]) // true
isEmpty([0]) // false
isEmpty(1) // false
isEmpty(false) // true



/**
 * - Check is provided data is an Error.prototype
 * @param data:any
 * @returns boolean
 * **/
isError(Error()) // true
isError(new Error()) // true
isError(true) // false



/**
 * - Check if item is already an instance of an object, and not an array!
 * @param data:any
 * @returns boolean
 * **/
isInstance({}) // false
isInstance(new function(){}) // true 
isInstance(new class(){} ) // true 
isInstance(function () { }) // false
isInstance([]) // false


/**
 * - Check if provided data has .prototype, means it can be called as new. `hasPrototype` is an alias of `isClass`
 * @param data:any
 * @returns boolean
 * **/
hasPrototype(function(){})/**isClass()**/ // true 
hasPrototype(new function(){}) // false
hasPrototype(Date) // true
hasPrototype(Object) // true


/**
 * - Will check if item has __proto__ example: `(new function(){}), {}, [],''` 
 * - return false for: `null, undefined`
 * @param data:any
 * @returns boolean
 * **/
hasProto({}) // true
hasProto('') // true
hasProto(-1) // true
hasProto(false) // true
hasProto(undefined) // false
hasProto(null) // false
hasProto(NaN) // true



/**
 * - Check data is a valid Date
 * @param data:any 
 * @returns boolean
 * **/
validDate(new Date('')) // false
validDate(new Date()) // true
validDate(new Date(1)) // true
validDate(Date()) // false because its a string haha



/**
 * - console.log, with prefix `[log]`
 * @param data:any
 * returns console.log
 * **/
log('my data',[1,2]) //  '[log]','my data',[1,2]



/**
 * - console.error, with prefix `[error]`
 * @param data:any
 * returns console.error
 * **/
error('ups','1') //  '[error]','ups','1'
onerror('ups','1') // '[error]','ups','1'



/**
 * - console.warn, with prefix `[warning]`
 * @param data:any
 * returns console.warn
 * **/
warn('attention','1') //  '[warning]','attention','1'



/**
 * - console.log() stack stack to where stack() was called
 * @param data:any optional
 * @param {boolean} asArray if set true, will output stack stack as an array, otherwise a string
 * @returns console.log `[STACK TRACE]`: xxxx
 * **/
stack('some data'/**, true*/)


/**
 * - console.error() stack trace to where trace() was called
 * @param data:any optional
 * @param {boolean} asArray if set true, will output error stack trace as an array, otherwise a string
 * @returns console.error [ERROR]: xxxx
 * **/
errorTrace('error data', true) // returns ["[ERROR]",... ]


/**
 * - recursive selection of array objects by reference
 * @param selectBy:Array required, uniq properties to target selectively from left/up to right/down, (repeated props will be ignored)
 * @param data:Array[{},{}] required, array of Objects with properties to target 
 * @returns always returns array []
 * **/

// select >b from both arrays, and return same order
selectiveArray(['a.b'], [ { a: { b:'hello' }, b:{c:'hello'} },{ a: { b:'world' },b:{c:'world'} } ]) 
//  [ [ 'hello'], [ 'world'] ] 

// select >b, and select >c from both arrays, and return same format
selectiveArray(['a.b','b.c'], [ { a: { b:'hello' }, b:{c:'hello'} },{ a: { b:'world' },b:{c:'world'} } ]) 
// [ ['hello','hello'], ['world','world'] ]

/* head(..) */ selectiveArray(['a.b','b.c'], [ { a: { b:'hello' }, b:{c:'world'} }]) 
//  [ [ 'hello', 'world'] ] << one pair from data array
// example : 
let [b,c]=Array.from( selectiveArray(['a.b','b.c'], [ { a: { b:'hello' }, b:{c:'world'} }])  ).values()

/** 
 * - will test `fn()` until timeout or data becomes available, or finaly return undefined
 * @param fn:function, method with something to return, returns value to access when ready
 * @param timeout:Number, specify max time to wait for data
 * @param testEvery:Numner, how ofter to check for data availability
 * @returns Promise/always resolves, and error, it will wrap it in {error} , if no data returns Promise.resolve(undefined), 
* **/
resolver(()=>Promise.resolve({data:'hello world'}),5000,50).then(n=>{
    log({resolver:n})
})
resolver(()=>Promise.reject('some error'),5000,50).then(n=>{
    log({resolver:n}) // {error: 'some error'}
})


let d = undefined
setTimeout(()=>{
    d = 'hello world'
},3000) // if we change it to more then 10000m resolver would return undefined, since its after timeout (timeout is never guaranteed,)

let fn=()=> d
// iterate every 50m and with max wait 5000m 
resolver(fn,5000,50).then(n=>{
    console.log(n) // hello world
})