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Can I use if (pointer) instead of if (pointer != NULL)?
...s converted to true.
This is part of the C++ standard conversion, which falls in Boolean conversion clause:
§ 4.12 Boolean conversions
A prvalue of arithmetic, unscoped enumeration, pointer, or pointer to member type can be converted to a prvalue of type bool. A zero value, null pointer valu...
Origin is not allowed by Access-Control-Allow-Origin
...rstand the underlying security issue. In my case, 2 servers are running locally, and like to enable cross domain requests during testing.
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What's the difference between a proc and a lambda in Ruby?
...ept the resulting Proc objects check the number of parameters passed when called.
An example:
p = Proc.new {|a, b| puts a**2+b**2 } # => #<Proc:0x3c7d28@(irb):1>
p.call 1, 2 # => 5
p.call 1 # => NoMethodError: undefined method `**' for nil:NilClass
p.call 1, 2, 3 # => 5
l = lamb...
How To Test if Type is Primitive
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This is great, I had to manually add Guid for my own purposes (as a primitive in my definition).
– Erik Philips
Jul 27 '12 at 22:54
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gem install: Failed to build gem native extension (can't find header files)
I am using Fedora 14 and I have MySQL and MySQL server 5.1.42 installed and running.
Now I tried to do this as root user:
1...
Why is vertical-align: middle not working on my span or div?
I'm trying to vertically center a span or div element within another div element. However when I put vertical-align: middle , nothing happens. I've tried changing the display properties of both elements, and nothing seems to work.
...
Android - Spacing between CheckBox and text
...ecessarily. Android's open source. A device vendor could substitute a totally different graphic with a totally different size. They love doing stuff like that for some reason.
– DougW
May 20 '11 at 19:17
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Can one do a for each loop in java in reverse order?
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The Collections.reverse method actually returns a new list with the elements of the original list copied into it in reverse order, so this has O(n) performance with regards to the size of the original list.
As a more efficient solution, you could write a deco...
Is it possible to rename a maven jar-with-dependencies?
...jar-with-dependencies" suffix.
The configuration below will output a jar called "test.jar"
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.2-beta-4</version>
<executions>
<execution>
<id>jar-with-dependencies</id...
Rank items in an array using Python/NumPy, without sorting array twice
... I did some testing with timeit, and this method is slightly slower for small arrays. On my machine they're equal when the array has 2,000 elements. At 20,000 elements, your method is about 25% faster.
– joshayers
Mar 12 '11 at 20:33
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