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“var” or no “var” in JavaScript's “for-in” loop?

What's the correct way to write a for-in loop in JavaScript? The browser doesn't issue a complaint about either of the two approaches I show here. First, there is this approach where the iteration variable x is explicitly declared: ...
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Can virtual functions have default parameters?

If I declare a base class (or interface class) and specify a default value for one or more of its parameters, do the derived classes have to specify the same defaults and if not, which defaults will manifest in the derived classes? ...
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What is the difference between bottom-up and top-down?

...at, perhaps, this answer previously confused top-down and bottom-up. While originally this answer (rev3) and other answers said that "bottom-up is memoization" ("assume the subproblems"), it may be the inverse (that is, "top-down" may be "assume the subproblems" and "bottom-up" may be "compose the s...
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Swift - which types to use? NSString or String

...s seem to not be automatically bridged as of this moment. See this answer for a discussion on how to get the a String's length and this answer for a discussion on using containsString() to check for substrings. (Disclaimer: I'm the author for both of these answers) I haven't fully explored other da...
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Git vs Team Foundation Server [closed]

... very familiar with TFS. Can someone with experience compare branching support on TFS to Git branching? Also, in general, what are the pros and cons of TFS? Am I going to hate it after using Git for a few years? ...
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Should I use window.navigate or document.location in JavaScript?

...ow.navigate and document.location used. Are there any differences in behavior? Are there differences in browser implementations? ...
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Clear the cache in JavaScript

... call window.location.reload(true) to reload the current page. It will ignore any cached items and retrieve new copies of the page, css, images, JavaScript, etc from the server. This doesn't clear the whole cache, but has the effect of clearing the cache for the page you are on. However, your bes...
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What does [].forEach.call() do in JavaScript?

... and I found multiple elements calling a function over a node list with a forEach applied to an empty array. 12 Answers ...
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What is the difference between 'my' and 'our' in Perl?

...separate from any package, so that the variable cannot be accessed in the form of $package_name::variable. On the other hand, our variables are package variables, and thus automatically: global variables definitely not private not necessarily new can be accessed outside the package (or lexical...
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Should I put #! (shebang) in Python scripts, and what form should it take?

Should I put the shebang in my Python scripts? In what form? 12 Answers 12 ...