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If table exists drop table then create it, if it does not exist just create it
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Just use DROP TABLE IF EXISTS:
DROP TABLE IF EXISTS `foo`;
CREATE TABLE `foo` ( ... );
Try searching the MySQL documentation first if you have any other problems.
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imp...
Constructor of an abstract class in C#
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From a terminology perspective, if Foo is an inheritable concrete type, and DerivedFoo:Foo, what term would you use to describe a heap object instance which will report its type as Foo, as distinct from DerivedFoo? My own inclination would be to use the phras...
How to create id with AUTO_INCREMENT on Oracle?
...asier to handle in some languages.
x is the identity column. Substitute FOO with your table name in each of the examples.
-- numerical identity, e.g. 1,2,3...
create table FOO (
x number primary key
);
create sequence FOO_seq;
create or replace trigger FOO_trg
before insert on FOO
for each...
class method generates “TypeError: … got multiple values for keyword argument …”
... is called, typically labelled self. If the class is declared thus:
class foo(object):
def foodo(self, thing=None, thong='not underwear'):
print thing if thing else "nothing"
print 'a thong is',thong
it behaves as expected.
Explanation:
Without self as the first parameter, when myfo...
Java Name Hiding: The Hard Way
... the target object isn't involved in invocation of static methods).
((net.foo.X) null).doSomething();
This has the benefits of
being side-effect free (a problem with instantiating net.foo.X),
not requiring renaming of anything (so you can give the method in B the name you want it to have; that'...
Is it a bad practice to use break in a for loop? [closed]
...shing found versus not found when you get out. That is:
for (int x=0;x<fooCount;++x)
{
Foo foo=getFooSomehow(x);
if (foo.bar==42)
break;
}
// So when we get here, did we find one, or did we fall out the bottom?
So okay, you can set a flag, or initialize a "found" value to null. But
T...
Create a Path from String in Java7
...e.com/javase/tutorial/essential/io/pathOps.html
Path p1 = Paths.get("/tmp/foo");
is the same as
Path p4 = FileSystems.getDefault().getPath("/tmp/foo");
Path p3 = Paths.get(URI.create("file:///Users/joe/FileTest.java"));
Path p5 = Paths.get(System.getProperty("user.home"),"logs", "foo.log"); ...
How can I add new keys to a dictionary?
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how can i add an element in a nested dict. Like php $foo[ ] = [ . . . . ]
– Juan-Kabbali
Apr 28 at 12:55
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How to Remove Array Element and Then Re-Index Array?
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unset($foo[0]); // remove item at index 0
$foo2 = array_values($foo); // 'reindex' array
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Get next / previous element using JavaScript?
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use the nextSibling and previousSibling properties:
<div id="foo1"></div>
<div id="foo2"></div>
<div id="foo3"></div>
document.getElementById('foo2').nextSibling; // #foo3
document.getElementById('foo2').previousSibling; // #foo1
However in some brow...