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Why is Java's SimpleDateFormat not thread-safe? [duplicate]

... Here is the example which results in a strange error. Even Google gives no results: public class ExampleClass { private static final Pattern dateCreateP = Pattern.compile("Дата подачи:\\s*(.+)"); private static final SimpleDateFormat sdf = new SimpleDateFormat...
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cannot load such file — zlib even after using rvm pkg install zlib

...se there's nothing to indicate you need the library until get some obscure error message while trying to do something routine. The solution is to use rvm. Use it even if you only need one version of ruby. Why? Because then you can do rvm requirements This will probe your particular OS and produc...
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Why is it string.join(list) instead of list.join(string)?

...ack_overflow' Using something else than strings will raise the following error: TypeError: sequence item 0: expected str instance, int found share | improve this answer | ...
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Difference between numeric, float and decimal in SQL Server

... data types can experience overflow and underflow. Overflow is an explicit error, however, underflow is silent. The characteristics of underflow for decimal and float are different. Decimal preserves against underflow as much as possible by increasing the precision or scale. However, once you hit th...
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The entity cannot be constructed in a LINQ to Entities query

...a getting lost when e.g. trying to save partially loaded entities. IMO, an error that blows up with a lot of noise (throwing an exception, etc) is better than behavior which can cause hidden bugs that are difficult to track down and explain (things kind of work nicely before you start noticing missi...
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Making a UITableView scroll when text field is selected

After a lot of trial and error, I'm giving up and asking the question. I've seen a lot of people with similar problems but can't get all the answers to work right. ...
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Warning the user/local/mysql/data directory is not owned by the mysql user

... Tried this on macOS Mojave and no joy. I get ERROR! The server quit without updating PID file when trying mysql.server start – Joshua Pinter Nov 14 '18 at 16:25 ...
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Java: Subpackage visibility?

... A package may not contain two members of the same name, or a compile-time error results. Here are some examples: Because the package java.awt has a subpackage image, it cannot (and does not) contain a declaration of a class or interface type named image. If there is a package named mouse and a mem...
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Why do people put code like “throw 1; ” and “for(;;);” in front of json responses? [du

... @kibubu A dedicated JSON parser should throw an error on that though. – Matt Mitchell Jun 30 '10 at 6:28 ...
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How did this person code “Hello World” with Microsoft Paint?

...dge of the DIB format it can be done, but it would be much much slower and error-prone. More info about the DIB format There are RLE compressed DIBs, but in this case uncompressed bitmaps are used (and they are used really rarely anyway). With the exception of the stride, that was avoided usin...