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Have a div cling to top of screen if scrolled down past it [duplicate]

I have a div which, when my page is first loaded, is about 100px from the top (it holds some buttons etc. for the page). 4 ...
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How to use the same C++ code for Android and iOS?

...eturns it. The idea is, iOS will send "Obj-C" and Android will send "Java" from their respective languages, and the CPP code will create a text as a follow "cpp says hello to << text received >>". Shared CPP code First of all, we are going to create the shared CPP code, doing it we hav...
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capturing self strongly in this block is likely to lead to a retain cycle

...y access of self.timerDisp - you can't refer to self or properties on self from within a block that will be strongly retained by self. You can get around this by creating a weak reference to self before accessing timerDisp inside your block: __weak typeof(self) weakSelf = self; [player addPeriodic...
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How do I calculate the date in JavaScript three months prior to today?

...r! You don't have to install a library! You don't have to copy and paste from stackoverflow! You can develop the code yourself to do precisely what you need! share | improve this answer ...
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What is the rationale for all comparisons returning false for IEEE754 NaN values?

Why do comparisons of NaN values behave differently from all other values? That is, all comparisons with the operators ==, =, where one or both values is NaN returns false, contrary to the behaviour of all other values. ...
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SQL Server - inner join when updating [duplicate]

... UPDATE R SET R.status = '0' FROM dbo.ProductReviews AS R INNER JOIN dbo.products AS P ON R.pid = P.id WHERE R.id = '17190' AND P.shopkeeper = '89137'; share ...
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Generating a Random Number between 1 and 10 Java [duplicate]

...and the specified value (exclusive)". This means that you will get numbers from 0 to 9 in your case. So you've done everything correctly by adding one to that number. Generally speaking, if you need to generate numbers from min to max (including both), you write random.nextInt(max - min + 1) + min...
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Ignore modified (but not committed) files in git?

...-index --skip-worktree which won't be lost on a hard reset or a new change from a pull. See the man page at http://schacon.github.com/git/git-update-index.html And a comparison at http://fallengamer.livejournal.com/93321.html ...
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What Makes a Method Thread-safe? What are the rules?

...ly not. You can write a program with only a single local variable accessed from a single thread that is nevertheless not threadsafe: https://stackoverflow.com/a/8883117/88656 Does that apply for static methods as well? Absolutely not. One answer, provided by @Cybis, was: "Local variables ...
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Reference — What does this symbol mean in PHP?

...to display the current number of apples, and then you want to subtract one from it. You can also increment letters in PHP: $i = "a"; while ($i < "c") { echo $i++; } Once z is reached aa is next, and so on. Note that character variables can be incremented but not decremented and even s...