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php is null or empty?
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What you're looking for is:
if($variable === NULL) {...}
Note the ===.
When use ==, as you did, PHP treats NULL, false, 0, the empty string, and empty arrays as equal.
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How to convert NSNumber to NSString
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//An example of implementation :
// we set the score of one player to a value
[Game getCurrent].scorePlayer1 = [NSNumber numberWithInteger:1];
// We copy the value in a NSNumber
NSNumber *aNumber = [Game getCurrent].scorePlayer1;
// Conversion of the NSNumber aNum...
Python dictionary from an object's fields
...s is already a dictionary, and if you want you can override getattr and/or setattr to call through and set the dict. For example:
class Foo(dict):
def __init__(self):
pass
def __getattr__(self, attr):
return self[attr]
# etc...
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Is it better to use C void arguments “void foo(void)” or not “void foo()”? [duplicate]
What is better: void foo() or void foo(void) ?
With void it looks ugly and inconsistent, but I've been told that it is good. Is this true?
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What characters are allowed in DOM IDs? [duplicate]
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Significantly, this means XML names are a superset of HTML names. i.e. Any valid HTML name is also a valid XML/XHTML name.
– Ben Blank
Jul 2 '09 at 23:14
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Remove 'a' from legend when using aesthetics and geom_text
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Set show.legend = FALSE in geom_text:
ggplot(data = iris,
aes(x = Sepal.Length, y = Sepal.Width, colour = Species, shape = Species, label = Species)) +
geom_point() +
geom_text(show.legend = FALSE)
The argu...
Is it possible to assign numeric value to an enum in Java?
...without the need for an accessor method. Since it's final, it can only be set in the constructor. IMO it leads to slightly cleaner code, but it's mostly a matter of preference, I suppose. Using a final variable saves you one method definition.
– Steve Ferguson
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py2exe - generate single executable file
... never figured it out. Has anyone successfully done this? Can I see your setup.py file, and what command line options you used?
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What are all the common ways to read a file in Ruby?
What are all the common ways to read a file in Ruby?
10 Answers
10
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jQuery animate backgroundColor
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The color plugin is only 4kb so much cheaper than the UI library. Of course you'll want to use a decent version of the plugin and not some buggy old thing which doesn't handle Safari and crashes when the transitions are too fast. Since a minified version isn't supplied you might like test v...