index.js ➔ ... ➔ prepare - Code Metrics - LukasMeine/vigilance - Measure and Improve Code Quality continuously with Scrutinizer

index.js ➔ ... ➔ prepare A
last analyzed 2018-08-02 16:14 UTC

↳ Parent: index.js ➔ ???

Complexity

Conditions	3
Paths	4

Size

Total Lines	7
Code Lines	4

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	3
eloc	4
nc	4
nop	1
dl	0
loc	7
rs	10
c	0
b	0
f	0

'use strict';
const from = require('from2');
const pIsPromise = require('p-is-promise');

module.exports = x => {
	if (Array.isArray(x)) {
		x = x.slice();
	}

	let promise;
	let iterator;

	prepare(x);

	function prepare(value) {

		x = value;
		promise = pIsPromise(x) ? x : null;
		// we don't iterate on strings and buffers since slicing them is ~7x faster
		const shouldIterate = !promise && x[Symbol.iterator] && typeof x !== 'string' && !Buffer.isBuffer(x);

		iterator = shouldIterate ? x[Symbol.iterator]() : null;
	}

	return from(function reader(size, cb) {
		if (promise) {
			promise.then(prepare).then(() => reader.call(this, size, cb), cb);
			return;
		}

		if (iterator) {
			const obj = iterator.next();
			setImmediate(cb, null, obj.done ? null : obj.value);
			return;
		}

		if (x.length === 0) {
			setImmediate(cb, null, null);
			return;
		}

		const chunk = x.slice(0, size);
		x = x.slice(size);

		setImmediate(cb, null, chunk);
	});
};

module.exports.obj = x => {
	if (Array.isArray(x)) {
		x = x.slice();
	}

	let promise;
	let iterator;

	prepare(x);

	function prepare(value) {

		x = value;
		promise = pIsPromise(x) ? x : null;
		iterator = !promise && x[Symbol.iterator] ? x[Symbol.iterator]() : null;

	}

	return from.obj(function reader(size, cb) {
		if (promise) {
			promise.then(prepare).then(() => reader.call(this, size, cb), cb);
			return;
		}

		if (iterator) {
			const obj = iterator.next();
			setImmediate(cb, null, obj.done ? null : obj.value);
			return;
		}

		this.push(x);

		setImmediate(cb, null, null);
	});
};


1			'use strict';
2			const from = require('from2');
3			const pIsPromise = require('p-is-promise');
4
5			module.exports = x => {
6			if (Array.isArray(x)) {
7			x = x.slice();
8			}
9
10			let promise;
11			let iterator;
12
13			prepare(x);
14
15			function prepare(value) {
			0 ignored issues – show Bug introduced 2018-05-14 04:10 UTC by Report Bug Copy Issue Report The function `prepare` is declared conditionally. This is not supported by all runtimes. Consider moving it to root scope or using `var prepare = function() { /* ... */ };` instead. Loading history...
16			x = value;
17			promise = pIsPromise(x) ? x : null;
18			// we don't iterate on strings and buffers since slicing them is ~7x faster
19			const shouldIterate = !promise && x[Symbol.iterator] && typeof x !== 'string' && !Buffer.isBuffer(x);
			0 ignored issues – show Bug introduced 2018-05-14 04:10 UTC by Report Bug Copy Issue Report The variable `Symbol` seems to be never declared. If this is a global, consider adding a `/** global: Symbol /` comment. This checks looks for references to variables that have not been declared. This is most likey a typographical error or a variable has been renamed. To learn more about declaring variables in Javascript, see the MDN. Loading history... Bug introduced 2018-05-14 04:10 UTC by Report Bug Copy Issue Report The variable `Buffer` seems to be never declared. If this is a global, consider adding a `/* global: Buffer */` comment. This checks looks for references to variables that have not been declared. This is most likey a typographical error or a variable has been renamed. To learn more about declaring variables in Javascript, see the MDN. Loading history...
20			iterator = shouldIterate ? x[Symbol.iterator]() : null;
21			}
22
23			return from(function reader(size, cb) {
24			if (promise) {
25			promise.then(prepare).then(() => reader.call(this, size, cb), cb);
26			return;
27			}
28
29			if (iterator) {
30			const obj = iterator.next();
31			setImmediate(cb, null, obj.done ? null : obj.value);
32			return;
33			}
34
35			if (x.length === 0) {
36			setImmediate(cb, null, null);
37			return;
38			}
39
40			const chunk = x.slice(0, size);
41			x = x.slice(size);
42
43			setImmediate(cb, null, chunk);
44			});
45			};
46
47			module.exports.obj = x => {
48			if (Array.isArray(x)) {
49			x = x.slice();
50			}
51
52			let promise;
53			let iterator;
54
55			prepare(x);
56
57			function prepare(value) {
			0 ignored issues – show Bug introduced 2018-05-14 04:10 UTC by Report Bug Copy Issue Report The function `prepare` is declared conditionally. This is not supported by all runtimes. Consider moving it to root scope or using `var prepare = function() { /* ... */ };` instead. Loading history...
58			x = value;
59			promise = pIsPromise(x) ? x : null;
60			iterator = !promise && x[Symbol.iterator] ? x[Symbol.iterator]() : null;
			0 ignored issues – show Bug introduced 2018-05-14 04:10 UTC by Report Bug Copy Issue Report The variable `Symbol` seems to be never declared. If this is a global, consider adding a `/** global: Symbol */` comment. This checks looks for references to variables that have not been declared. This is most likey a typographical error or a variable has been renamed. To learn more about declaring variables in Javascript, see the MDN. Loading history...
61			}
62
63			return from.obj(function reader(size, cb) {
64			if (promise) {
65			promise.then(prepare).then(() => reader.call(this, size, cb), cb);
66			return;
67			}
68
69			if (iterator) {
70			const obj = iterator.next();
71			setImmediate(cb, null, obj.done ? null : obj.value);
72			return;
73			}
74
75			this.push(x);
76
77			setImmediate(cb, null, null);
78			});
79			};
80

LukasMeine / vigilance

index.js ➔ ... ➔ prepare A last analyzed 2018-08-02 16:14 UTC

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index.js ➔ ... ➔ prepare A
last analyzed 2018-08-02 16:14 UTC