lorenzo puccetti lorenzoongithub
lorenzoongithub
/ coercion-in-javascript
Last active
August 29, 2015 14:16
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| // Based on an article by kyle simpson - youdontknowjs | |
| // =================================================== | |
| // | |
| // String(x) | |
| // | |
| if ( String(0) !== "0") throw '' | |
| if ( String(.0) !== "0") throw '' | |
| if ( String(-0) !== "0") throw '' | |
| if ( isNaN( String(NaN) ) === false) throw '' |
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| // | |
| // see: http://underscorejs.org/ | |
| // | |
| load('http://underscorejs.org/underscore-min.js'); | |
| sum = 0; | |
| _.each([1, 2, 3],function(i) { sum+=i }); | |
| if (sum !== 6) throw ''; |
lorenzoongithub
/ is.js
Last active
August 29, 2015 14:17
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| // first cut. | |
| // see: http://arasatasaygin.github.io/is.js/ | |
| // | |
| load('http://arasatasaygin.github.io/is.js/scripts/is.js'); | |
| var getArguments = function() { | |
| return arguments; | |
| }; | |
| var arguments = getArguments(); |
lorenzoongithub
/ print additional props in window
Created
March 25, 2015 21:07
additional properties in the window - little script to run on the chrome console
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| // make sure it doesn't count my own properties | |
| (function () { | |
| var results, currentWindow, | |
| // create an iframe and append to body to load a clean window object | |
| iframe = document.createElement('iframe'); | |
| iframe.style.display = 'none'; | |
| document.body.appendChild(iframe); | |
| // get the current list of properties on window | |
| currentWindow = Object.getOwnPropertyNames(window); | |
| // filter the list against the properties that exist in the clean window |
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| // | |
| // Showcase for Esprima. | |
| // http://esprima.org | |
| // | |
| // This work is based on the following work | |
| // https://github.com/marijnh/acorn/blob/master/test/tests.js | |
| // | |
| load('http://esprima.org/esprima.js'); |
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| // | |
| // A basic function to check whether two values are equal, in the intuitive sense. | |
| // | |
| function equal(a, b) { | |
| if (a !== null && a !== undefined && b !== null && b !== undefined) { | |
| if (a.length !== b.length) return false; | |
| if (a !== a.toString() && b !== b.toString()) { | |
| for (var i in a) { if (!equal(a[i],b[i])) return false; } | |
| for (var i in b) { if (!equal(a[i],b[i])) return false; } | |
| } |
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| // | |
| // javascript's math | |
| // | |
| var x = 0.1; | |
| var y = 0.2; | |
| if (x+y == 0.3) throw ''; | |
| if (x+y != 0.30000000000000004) throw ''; |
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| // | |
| // A falsy value is a value that translates to false when evaluated in a Boolean context. | |
| // see: https://developer.mozilla.org/en-US/docs/Glossary/Falsy | |
| // | |
| if (false) throw ''; | |
| if (null) throw ''; | |
| if (undefined) throw ''; | |
| if (0) throw ''; | |
| if (NaN) throw ''; | |
| if ('') throw ''; |
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| // | |
| // see: papaparse.com | |
| // use cases derived from https://raw.githubusercontent.com/mholt/PapaParse/master/tests/test-cases.js | |
| // | |
| load('http://papaparse.com/resources/js/papaparse.js'); | |
| //One row | |
| oj = Papa.parse("A,b,c"); | |
| if (oj.data === null) throw ""; |
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| // | |
| // numerals.js - a javascript library for formatting and manipulating numbers | |
| // | |
| // http://numeraljs.com/ | |
| // https://github.com/adamwdraper/Numeral-js | |
| // | |
| // | |
| // This work has been derived from | |
| // https://github.com/adamwdraper/Numeral-js/blob/master/tests/numeral/format.js | |
| // |
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