Tons of Solutions Engineering work done today for the rest of the CS team! Headway, Howard Hanna, Engels, Brighton, etc. Also completed Datasnippers auth flow and worked on Anthology's script. Cloned Anthology's courses (900..) and will clone Full Story on Monday.
This commit is contained in:
15
Scripts/node_modules/once/LICENSE
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Scripts/node_modules/once/LICENSE
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The ISC License
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Copyright (c) Isaac Z. Schlueter and Contributors
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
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IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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79
Scripts/node_modules/once/README.md
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Scripts/node_modules/once/README.md
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# once
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Only call a function once.
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## usage
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```javascript
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var once = require('once')
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function load (file, cb) {
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cb = once(cb)
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loader.load('file')
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loader.once('load', cb)
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loader.once('error', cb)
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}
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```
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Or add to the Function.prototype in a responsible way:
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```javascript
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// only has to be done once
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require('once').proto()
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function load (file, cb) {
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cb = cb.once()
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loader.load('file')
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loader.once('load', cb)
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loader.once('error', cb)
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}
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```
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Ironically, the prototype feature makes this module twice as
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complicated as necessary.
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To check whether you function has been called, use `fn.called`. Once the
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function is called for the first time the return value of the original
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function is saved in `fn.value` and subsequent calls will continue to
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return this value.
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```javascript
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var once = require('once')
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function load (cb) {
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cb = once(cb)
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var stream = createStream()
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stream.once('data', cb)
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stream.once('end', function () {
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if (!cb.called) cb(new Error('not found'))
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})
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}
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```
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## `once.strict(func)`
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Throw an error if the function is called twice.
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Some functions are expected to be called only once. Using `once` for them would
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potentially hide logical errors.
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In the example below, the `greet` function has to call the callback only once:
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```javascript
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function greet (name, cb) {
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// return is missing from the if statement
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// when no name is passed, the callback is called twice
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if (!name) cb('Hello anonymous')
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cb('Hello ' + name)
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}
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function log (msg) {
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console.log(msg)
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}
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// this will print 'Hello anonymous' but the logical error will be missed
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greet(null, once(msg))
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// once.strict will print 'Hello anonymous' and throw an error when the callback will be called the second time
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greet(null, once.strict(msg))
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```
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42
Scripts/node_modules/once/once.js
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Scripts/node_modules/once/once.js
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var wrappy = require('wrappy')
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module.exports = wrappy(once)
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module.exports.strict = wrappy(onceStrict)
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once.proto = once(function () {
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Object.defineProperty(Function.prototype, 'once', {
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value: function () {
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return once(this)
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},
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configurable: true
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})
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Object.defineProperty(Function.prototype, 'onceStrict', {
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value: function () {
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return onceStrict(this)
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},
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configurable: true
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})
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})
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function once (fn) {
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var f = function () {
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if (f.called) return f.value
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f.called = true
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return f.value = fn.apply(this, arguments)
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}
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f.called = false
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return f
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}
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function onceStrict (fn) {
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var f = function () {
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if (f.called)
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throw new Error(f.onceError)
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f.called = true
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return f.value = fn.apply(this, arguments)
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}
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var name = fn.name || 'Function wrapped with `once`'
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f.onceError = name + " shouldn't be called more than once"
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f.called = false
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return f
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}
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33
Scripts/node_modules/once/package.json
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Scripts/node_modules/once/package.json
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{
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"name": "once",
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"version": "1.4.0",
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"description": "Run a function exactly one time",
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"main": "once.js",
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"directories": {
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"test": "test"
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},
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"dependencies": {
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"wrappy": "1"
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},
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"devDependencies": {
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"tap": "^7.0.1"
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},
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"scripts": {
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"test": "tap test/*.js"
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},
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"files": [
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"once.js"
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],
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"repository": {
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"type": "git",
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"url": "git://github.com/isaacs/once"
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},
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"keywords": [
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"once",
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"function",
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"one",
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"single"
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],
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"author": "Isaac Z. Schlueter <i@izs.me> (http://blog.izs.me/)",
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"license": "ISC"
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}
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