Longo Namespace: Utils

Utility methods of Longo.
These methods are also available from application.

Source:

longo.js, line 225

Methods

<static> ab2str(buf) → {String}

Decode Uint16Array to String

Parameters:

Name	Type	Description
`buf`	Uint16Array	Uint16Array

Source:

longo.js, line 246

See:

Returns:

str decoded string

Type: String

<static> aSlice(arguments) → {Array}

Alias for Array.prototype.slice.apply.

Parameters:

Name	Type	Description
`arguments`	Object	argument object

Source:

longo.js, line 381

Returns:

result

Type: Array

<static> asNoop() → {function}

return noop as function.

Source:

longo.js, line 369

Returns:

Longo.Utils.noop

Type: function

<static> checkOrElse(val, els, pred) → {Any}

return val if result of input has been evaluated by predictor is truthy else return els

Parameters:

Name	Type	Description
`val`	Object
`els`	Object
`pred`	function	predictor

Source:

longo.js, line 556

Returns:

result

Type: Any

<static> createLogger(prefix) → {Object}

return prefixed logger.

Parameters:

Name	Type	Description
`prefix`	prefix

Source:

longo.js, line 300

Returns:

logger

Type: Object

<static> dataFromId(id) → {Date}

Parse id to Date object

Parameters:

Name	Type	Description
`id`	String	start with timestamp

Source:

longo.js, line 613

Returns:

result

Type: Date

<static> defer(f) → {Promise}

Return promise object

Parameters:

Name	Type	Description
`f`	function	This function should call `done` and `reject`.

Source:

longo.js, line 641

Returns:

promise thenable object

Type: Promise

<static> doWhen(cond, action, values, context) → {Any}

execute action with values when condition is truthy

Parameters:

Name	Type	Description
`cond`	Boolean
`action`	function
`values`	Array
`context`	Object

Source:

longo.js, line 505

Returns:

result

Type: Any

<static> doWhenOrElse(cond, action, alternative, values, context) → {Any}

execute action with values when condition is truthy else execute alternative

Parameters:

Name	Type	Description
`cond`	Boolean
`action`	function
`alternative`	function
`values`	Array
`context`	Object

Source:

longo.js, line 525

Returns:

result

Type: Any

<static> existy(val) → {Boolean}

return true if input is not null or undefined.

Parameters:

Name	Type	Description
`val`	Object

Source:

longo.js, line 405

Returns:

result

Type: Boolean

<static> getOrElse(val, els) → {Any}

return input if input is existy else return els

Parameters:

Name	Type	Description
`val`	Object
`els`	Object

Source:

longo.js, line 542

Returns:

result

Type: Any

<static> inherits(ctor) → {function}

Browser-friendly inheritance fully compatible with standard node.js inherits
This method have Side-effect

Parameters:

Name	Type	Description
`ctor`	function	constructor

Source:

longo.js, line 280

See:

https://github.com/isaacs/inherits

Returns:

superCtor constructor of superClass

Type: function

<static> isFalse(val) → {Boolean}

return true if input is the false

Parameters:

Name	Type	Description
`val`	Object

Source:

longo.js, line 442

Returns:

result

Type: Boolean

<static> isNegativeNum(val) → {Boolean}

return true if input is less than 0

Parameters:

Name	Type	Description
`val`	Object

Source:

longo.js, line 454

Returns:

result

Type: Boolean

<static> isOne(val) → {Boolean}

return true if input is the 1

Parameters:

Name	Type	Description
`val`	Object

Source:

longo.js, line 478

Returns:

result

Type: Boolean

<static> isPositiveNum(val) → {Boolean}

return true if input is greater than 0

Parameters:

Name	Type	Description
`val`	Object

Source:

longo.js, line 490

Returns:

result

Type: Boolean

<static> isTrue(val) → {Boolean}

return true if input is the true

Parameters:

Name	Type	Description
`val`	Object

Source:

longo.js, line 430

Returns:

result

Type: Boolean

<static> isZero(val) → {Boolean}

return true if input is the 0

Parameters:

Name	Type	Description
`val`	Object

Source:

longo.js, line 466

Returns:

result

Type: Boolean

<static> noop()

Do nothing

Source:

longo.js, line 357

Returns:

undefined

<static> objectId(id) → {String}

Generate objectId

Parameters:

Name	Type	Argument	Default	Description
`id`	String	<optional>	null

Source:

longo.js, line 587

Returns:

objectId if id is specified return that id

Type: String

<static> str2ab(str) → {Uint16Array}

Encode String to Uint16Array for zero-copy messageing

Parameters:

Name	Type	Description
`str`	String	target string

Source:

longo.js, line 261

See:

Returns:

buf encoded Uint16Array

Type: Uint16Array

<static> toArray(val) → {Array}

return input as Array.

Parameters:

Name	Type	Description
`val`	Object

Source:

longo.js, line 393

Returns:

result

Type: Array

<static> truthy(val) → {Boolean}

return true if input is not null or undefined or false
0, -1, "" is detected as truthy

Parameters:

Name	Type	Description
`val`	Object

Source:

longo.js, line 418

Returns:

result

Type: Boolean

<static> tryParseJSON(str) → {Array}

Try parse string to JSON object

Parameters:

Name	Type	Description
`str`	String	JSON formated string

Source:

longo.js, line 568

Returns:

result A Tuple [error, parsed]

Type: Array

<static> uuid() → {String}

Return uuid like random value

Source:

longo.js, line 624

Returns:

uuid uuid like random value

Type: String