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Why do we need boxing and unboxing in C#?
...values are equal. This is a dangerously easy mistake to make. Perhaps even more subtle
double e = 2.718281828459045;
object o1 = e;
object o2 = e;
Console.WriteLine(o1 == o2);
will also print False!
Better to say:
Console.WriteLine(o1.Equals(o2));
which will then, thankfully, print True.
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Searching if value exists in a list of objects using Linq
...ing I use bool has = list.All(cus => cus.FirstName != "John"); Is this more optimal ?
– Gullu
Dec 5 '18 at 15:55
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Rethrowing exceptions in Java without losing the stack trace
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In Java 7 compiler for such rethrow is more inteligent. Now it works fine with specific "throws" exceptions in containing method.
– Waldemar Wosiński
Jan 29 '13 at 16:18
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Why doesn't logcat show anything in my Android?
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I had this same issue but my fix was much more basic:
If the LogCat panel is empty in Eclipse the emulator doesn't have the focus. Go to the DDMS perspective and try clicking on the 'emulator' entry in the Devices panel (top-left screen).
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How can I disable ARC for a single file in a project?
...(e.g., in unit tests and mock objects) where the rules of ARC are a little more fragile right now. I recall hearing that there was a way to disable ARC on a per-file basis, though I have been unable to find this option.
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Sequelize.js delete query?
...t seems like the accepted answer should get updated... but that's probably more of a site wide issue.
– Rojuinex
Jun 19 '16 at 20:14
1
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Why am I getting ibtool failed with exit code 255?
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I had already tried this, but I tried it a few more times, and it eventually solved the issue.
– Darren
Mar 14 '13 at 23:58
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Sending email through Gmail SMTP server with C#
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MySQL Creating tables with Foreign Keys giving errno: 150
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one more thing worth adding: if the PK of the parent table is more than one field, the order of the fields in the FK must be the same as the order in the PK
– Kip
May 9 '12 at 20:44
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