Quote by Eric Freeman Download Open image ““The type of undefined is undefined. Why?”” — Eric Freeman ★ ★ ★ ★ ★ 4.6 out of 5 (6 ratings) Copy quoteShare
... the results are undefined, and we all know what 'undefined' means: it means it works during development, it works during testing, and it… — Scott Meyers Copy Share Image
“undefined and NaN are not constants. They are global variables, and you can change their values. That should not be possible, and yet it… — Douglas Crockford Copy Share Image
“When things consistently fail to compute, it does point to a consistently undefined possibility.” — Edwin F. Becker Copy Share Image
“What does it mean to assign the value null to a variable? How about “We intend to assign an object to this variable at… — Eric Freeman Copy Share Image
“There are five falsey values in JavaScript: undefined is falsey. null is falsey. 0 is falsey. The empty string is falsey. NaN is falsey.” — Eric Freeman Copy Share Image
“Dividing a number by zero doesn’t produce an infinitely large number as an answer. The reason is that division is defined as the inverse… — Ted Chiang Copy Share Image
“Function expressions and variables declared inside a function without using var become global properties.” — Cody Lindley Copy Share Image
“If something does not exist, then it makes it very difficult to give it a definition.” — Albert Einstein Copy Share Image
“We cannot define. Nothing has ever been finally figured out, because there is nothing final to figure out” — Charles Fort Copy Share Image
What should we gain by a definition, as it can only lead us to other undefined terms? — Ludwig Wittgenstein Copy Share Image
“When you delete a property, you’re not just deleting the value of the property, you’re deleting the property itself. And, if you try to… — Eric Freeman Copy Share Image
“when you assign a value to a variable name that hasn’t been previously declared, it is treated as a new, global variable. So be… — Eric Freeman Copy Share Image
“Web Workers have a global function named importScripts that you can use to import one or more JavaScript files into your worker. To” — Eric Freeman Copy Share Image
“If the two values have different types, try to convert them into the same type and then compare them” — Eric Freeman Copy Share Image
“Well, it’s a browser policy, and it says you can’t retrieve data from a domain that is different from the domain the page itself… — Eric Freeman Copy Share Image
“Math is not a constructor, or even a function. It’s an object. As you know, Math is a built-in object that you can use… — Eric Freeman Copy Share Image
“When you pass zero to setTimeout, you’re asking JavaScript to run your timeout handler as soon as it possibly can — and this leads… — Eric Freeman Copy Share Image
“JavaScript doesn’t have a character type. So characters are returned as new strings containing one character.” — Eric Freeman Copy Share Image
“Lexical scope means that we can determine the scope of a variable by reading our code.” — Eric Freeman Copy Share Image
“Q: Q: You said getElementsByTagName returns a list. Do you mean an array? A: A: It returns an object that you can treat like… — Eric Freeman Copy Share Image
