“A callback works like this: give a function to the object that knows about the event. When the event occurs, that object… — Eric Freeman Copy Share Image
“When you call an object’s method, this is set to the object whose method was called. If the method is not found… — Eric Freeman Copy Share Image
“position: absolute” positions an element based on the position of its most closely positioned parent.” — Eric Freeman Copy Share Image
“If you assign a new variable without using the var keyword, that variable will be global, even if you are first assigning… — Eric Freeman Without u 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… — Eric Freeman Copy Share Image
“Now when we use the function keyword this way — that is, within a statement, like an assignment statement — we call… — Eric Freeman Copy Share Image
“The large number of acknowledgments is because we’re testing the theory that everyone mentioned in a book acknowledgment will buy at least… — Eric Freeman Books Copy Share Image
“You’ll also hear developers refer to === (strict equality) as the “identity” operator.” — Eric Freeman Programming Copy Share Image
“If you give it an index that is greater than or equal to the length of the string, it returns the empty… — Eric Freeman Copy Share Image
“An expression is anything that evaluates to a value. 3+4” — Eric Freeman Depression Copy Share Image
“Speaking activates a different part of the brain. If you’re trying to understand something, or increase your chance of remembering it later,… — Eric Freeman Copy Share Image
“concentrate on knowing what is falsey, and then everything else you can consider truthy. Let’s look at some examples of using these… — Eric Freeman Truth Copy Share Image
“When you pass a primitive value it is copied into the parameter. We call this “passing by value.” So if you change… — Eric Freeman Copy Share Image
“Now, when we have an environment that has a value for each of the free variables, we say that we’ve closed the… — Eric Freeman Copy Share Image
“You can use arguments to create a function that accepts a variable number of arguments, or create a function that does different… — Eric Freeman Copy Share Image
“when you send an object the worker gets a copy of it. Any changes the worker makes will not affect the object… — Eric Freeman Copy Share Image
“You can extend your object at any time with new properties. To do this you just specify the new property and give… — Eric Freeman Time Copy Share Image
“Well, say you write a handler and it requires a lot of computation — that is, something that takes a long time… — Eric Freeman Computers Copy Share Image
“Remember, null is intended to represent an object that isn’t there.” — Eric Freeman Copy Share Image
