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How to prevent Node.js from exiting while waiting for a callback?
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I guess he means that if the library has converted code that once was synchronous to a new asynchronous version, it's possible that the library creators forgot to queue the callbacks and the event queues get emptied somewhere in the middle of your execution, thus fi...
Updating MySQL primary key
...delete u from user_interactions u, fixit
where fixit.user_2 = u.user_2
and fixit.user_1 = u.user_1
and fixit.type = u.type
and fixit.timestamp != u.timestamp;
alter table user_interactions add primary key (user_2, user_1, type );
unlock tables;
The lock should stop further updates comi...
Strings as Primary Keys in SQL Database [closed]
I am not very familiar with databases and the theories behind how they work. Is it any slower from a performance standpoint (inserting/updating/querying) to use Strings for Primary Keys than integers?
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Differences between unique_ptr and shared_ptr [duplicate]
...ated with make_shared. But if you create a unique_ptr<Derived>, then convert it to unique_ptr<Base>, and if Derived is virtual and Base is not, then the pointer will be deleted through the wrong type and there can be undefined behaviour. This can be fixed with an appropriate deleter-type...
Java logical operator short-circuiting
Which set is short-circuiting, and what exactly does it mean that the complex conditional expression is short-circuiting?
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JavaScript: How to find out if the user browser is Chrome?
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@vishalsharma, the !! converts the value to be either true or false. typeof(window.chrome) gives "object", whereas typeof(!!window.chrome) gives "boolean". Your code sample also works too because the if statement does the conversion.
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What's the point of NSAssert, actually?
...Is that the reason why to use NSAssert? Or what else is the benefit of it? And is it right to put an NSAssert just above any assumption I make in code, like a function that should never receive a -1 as param but may a -0.9 or -1.1?
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Why charset names are not constants?
Charset issues are confusing and complicated by themselves, but on top of that you have to remember exact names of your charsets. Is it "utf8" ? Or "utf-8" ? Or maybe "UTF-8" ? When searching internet for code samples you will see all of the above. Why not just make them named constants and use ...
Dealing with commas in a CSV file
I am looking for suggestions on how to handle a csv file that is being created, then uploaded by our customers, and that may have a comma in a value, like a company name.
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DbArithmeticExpression arguments must have a numeric common type
...ps = context.Sleeps.AsEnumerable().Where(....
Adding AsEnumerable() will convert the SQL query to entity and allows to run .Net functions on them. For more info, check here about AsEnumerable
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