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Why must wait() always be in synchronized block

...ronized block, otherwise an IllegalMonitorStateException is thrown. But what's the reason for making this restriction? I know that wait() releases the monitor, but why do we need to explicitly acquire the monitor by making particular block synchronized and then release the monitor by calling ...
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Best way to simulate “group by” from bash?

... This will print the count first, but other than that it should be exactly what you want. share | improve this answer | follow | ...
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What happens if you static_cast invalid value to enum class?

... What is color set to according to the standard? Answering with a quote from the C++11 and C++14 Standards: [expr.static.cast]/10 A value of integral or enumeration type can be explicitly converted to an enumeration typ...
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What guidelines for HTML email design are there? [closed]

What guidelines can you give for rich HTML formatting in emails while maintaining good visual stability across many clients and web based email interfaces? ...
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How to print a dictionary's key?

... Although this worked beautifully for me in Python 2.7, what's the alternative in Py3k? I know .iteritems() is no longer supported... – piperchester Mar 27 '13 at 21:18 ...
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Why is it considered a bad practice to omit curly braces? [closed]

... Speed of reading... Aside from what has already been mentioned. At this point, I've already been conditioned to parse if statements with braces and white space. So I read: if (condition) { DoSomething(); } DoSomethingElse(); Slightly faster than I ...
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ios app maximum memory budget

...ot to go beyond the 70 Mb limit, however it really depends on many things: what iOS version you're using (not SDK), how many applications running in background, what exact memory you're using etc. Just avoid the instant memory splashes (e.g. you're using 40 Mb of RAM, and then allocating 80 Mb's mo...
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What makes a SQL statement sargable?

By definition (at least from what I've seen) sargable means that a query is capable of having the query engine optimize the execution plan that the query uses. I've tried looking up the answers, but there doesn't seem to be a lot on the subject matter. So the question is, what does or doesn't make...
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What is a 'multi-part identifier' and why can't it be bound?

...sure that it is not a typo spelling-wise, perhaps it is a typo case-wise. What collation are you using? Check it. share | improve this answer | follow | ...
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What is the purpose of a question mark after a type (for example: int? myVariable)?

... The second sentence confuses me. What do you mean by "cannot"? On the compiler level or in the application context. – problemofficer Jun 29 '17 at 22:00 ...