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Return 0 if field is null in MySQL
...) returns expr1; otherwise it returns expr2. IFNULL() returns a numeric or string value, depending on the context in which it is used.
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When should I use the “strictfp” keyword in java?
...latform. If you don't use strictfp, the JVM implementation is free to use extra precision where available.
From the JLS:
Within an FP-strict expression, all
intermediate values must be elements
of the float value set or the double
value set, implying that the results
of all FP-strict e...
JavaScript pattern for multiple constructors
...was omitted in call
b= 'some default value';
if (typeof(a)==='string')
this._constructInSomeWay(a, b);
else if (a instanceof MyType)
this._constructInSomeOtherWay(a, b);
}
You can also access arguments as an array-like to get any further arguments passed in.
If yo...
How do I look inside a Python object?
...
the best way to see object and its contents in a string
– Peter Krauss
Dec 28 '19 at 21:57
T...
How do I use extern to share variables between source files?
...
SFLAGS = -std=c11
GFLAGS = -g
OFLAGS = -O3
WFLAG1 = -Wall
WFLAG2 = -Wextra
WFLAG3 = -Werror
WFLAG4 = -Wstrict-prototypes
WFLAG5 = -Wmissing-prototypes
WFLAGS = ${WFLAG1} ${WFLAG2} ${WFLAG3} ${WFLAG4} ${WFLAG5}
UFLAGS = # Set on command line only
CFLAGS = ${SFLAGS} ${GFLAGS} ${OFLAGS} ${...
Allowed characters in Linux environment variable names
...
From The Open Group:
These strings have the form
name=value; names shall not contain
the character '='. For values to be
portable across systems conforming to
IEEE Std 1003.1-2001, the value shall
be composed of characters from the
portable...
How to force IntelliJ IDEA to reload dependencies from build.sbt after they changed?
...:::::::::::::::::::
[warn]
[warn] Note: Some unresolved dependencies have extra attributes. Check that these dependencies exist with the requested attributes.
[warn] org.jetbrains:sbt-structure:latest.integration (sbtVersion=0.13, scalaVersion=2.10)
I have opened a ticket at JetBrains.
...
Converting an int to std::string
What is the shortest way, preferably inline-able, to convert an int to a string? Answers using stl and boost will be welcomed.
...
Convert from enum ordinal to enum type
...the database. Furthermore, it's better to use int manipulation rather than String...
– user660940
Mar 15 '11 at 16:06
...
Django: Why do some model fields clash with each other?
...
Sometimes you have to use extra formatting in related_name
- actually, any time when inheritance is used.
class Value(models.Model):
value = models.DecimalField(decimal_places=2, max_digits=5)
animal = models.ForeignKey(
Animal, relat...