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Types in MySQL: BigInt(20) vs Int(20)
...accept.
Practically, it affects only the ZEROFILL option:
CREATE TABLE foo ( bar INT(20) ZEROFILL );
INSERT INTO foo (bar) VALUES (1234);
SELECT bar from foo;
+----------------------+
| bar |
+----------------------+
| 00000000000000001234 |
+----------------------+
It's a co...
Possible heap pollution via varargs parameter
...
When you declare
public static <T> void foo(List<T>... bar) the compiler converts it to
public static <T> void foo(List<T>[] bar) then to
public static void foo(List[] bar)
The danger then arises that you'll mistakenly assign incorrect values i...
Why doesn't Java allow generic subclasses of Throwable?
...lowing code:
try
{
doSomethingThatCanThrow();
}
catch (MyException<Foo> e)
{
// handle it
}
As you note, parameterization is just syntactic sugar. However, the compiler tries to ensure that parameterization remains consistent across all references to an object in compilation scope. ...
MySQL Cannot Add Foreign Key Constraint
...
mysql> create unique index index_bar_id on foos(bar_id); ... mysql> alter table foos add constraint index_bar_id foreign key (bar_id) references bars (id); sixarm.com/about/…
– CookieCoder
Dec 17 '13 at 16:09
...
Is there a CSS selector by class prefix?
...ch the following element, which may be undesirable:
<div id='D' class='foo-class foo-status-bar bar-class'></div>
If you can ensure that such a scenario will never happen, then you are free to use such a selector for the sake of simplicity. However, the combination above is much more ...
how to get GET and POST variables with JQuery?
... Your extraction method doesn’t consider arguments with no value (”?foo&bar=baz“ => {foo:"", bar:"baz"}).
– Gumbo
Feb 5 '09 at 15:01
1
...
What causes javac to issue the “uses unchecked or unsafe operations” warning
...icit about types, in one way or another.
For example. the code ArrayList foo = new ArrayList(); triggers that warning because javac is looking for ArrayList<String> foo = new ArrayList<String>();
share
...
How do I see a C/C++ source file after preprocessing in Visual Studio?
...hich is sent
to the standard output.
So you can just run:
gcc -E foo.c
If you can't find such an option, you can also just find the C preprocessor on your machine. It's usually called cpp and is probably already in your path. Invoke it like this:
cpp foo.c
If there are headers you n...
What does the “===” operator do in Ruby? [duplicate]
...ourtytwo' # => false
/ell/ === 'Hello' # => true
/ell/ === 'Foobar' # => false
The main usage for the === operator is in case expressions, since
case foo
when bar
baz
when quux
flurb
else
blarf
end
gets translated to something (roughly) like
_temp = foo
if bar === _...
How can I create a Makefile for C projects with SRC, OBJ, and BIN subdirectories?
...d executables instead of stopping at objects, and
the name of the target (foo.o) is not what the rule will actually produce (obj/foo.o).
I suggest the following:
OBJECTS := $(SOURCES:$(SRCDIR)/%.c=$(OBJDIR)/%.o)
$(OBJECTS): $(OBJDIR)/%.o : $(SRCDIR)/%.c
$(CC) $(CFLAGS) -c $< -o $@
@...