Javascript Assignment Operator

Javascript Assignment Operator-24
If you’re adding, subtracting, multiplying, dividing, or remaindering two values, there’s no need to type out the entire equation.Use these shorthands to save time and code: As an example, we’ll look at the addition of two variables.

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Usually you just want to compare two values and take action based on whether they're equal or not.

That's why you generally use the equality operator every time the loop restarts.

So every good developer knows the difference between =, == (and ===). Accessing the length property is very expensive in this case because the browser needs to re-compile the complete list (you never know if some node has appeared or disappeared) to calculate the length.

In general you should avoid using get Elements By Tag Name as much as you can.

Posted by Lon on 15 January 2008 | Permalink Hi Peter Paul, your example using get Elements By Tag Name is dangerous. As a consequence if your 'do Something' removes the node you will skip the next one due to the way you traverse the list.

Either traverse backwards (which is much cheaper as well) or do it different (conditional increment of counter for instance), but don't do it the way you are proposing. Posted by Christopher Boomer on 15 January 2008 | Permalink This technique is one I have always strategically avoided to avoid confusing myself.

Posted by Peter Siewert on 14 January 2008 | Permalink I never thought to use the assignment opperator in the for() loop like that.

Generally for my versions of the find Position functions, I just use recursion and sidestep the whole loop question: function find Left(obj) function find Top(obj) It might have a slightly higher performance hit, but you cant really beat a 2 line function.

In Java, the compiler gives you a warning for that !

(in java, this only work with boolean as integer are never converted into boolean...) Anyway in my sense, using the implicit conversion from integer to boolean should be avoided because it lacks clarity.


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