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How to add a filter class in Spring Boot?
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How to find out what character key is pressed?
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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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javac error: Class names are only accepted if annotation processing is explicitly requested
... if annotation processing is explicitly requested" can be caused by one or more of the following:
Not using the .java extension for your java file when compiling.
Improper capitalization of the .java extension (i.e. .Java) when compiling.
Any other typo in the .java extension when compiling.
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psql - save results of command to a file
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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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Formatting a number with exactly two decimals in JavaScript
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How to find serial number of Android device?
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