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Section vs Article HTML5
... or
subjects, or to define the different sections of a single article.
And then displays an image that I cleaned up:
It also describes how to use the <article> tag (from same W3 link above):
<article> is related to <section>, but is distinctly different.
Whereas <se...
What and where are the stack and heap?
...amming language books explain that value types are created on the stack , and reference types are created on the heap , without explaining what these two things are. I haven't read a clear explanation of this. I understand what a stack is. But,
...
NOT IN vs NOT EXISTS
...l need to do more work (even if no NULLs are actually present in the data) and the semantics of NOT IN if NULLs are present are unlikely to be the ones you want anyway.
When neither Products.ProductID or [Order Details].ProductID allow NULLs the NOT IN will be treated identically to the following q...
How can you program if you're blind?
...my answer will be based off these. I use windows xp as my operating system and Jaws to read what appears on the screen to me in synthetic speech. For java programming I use eclipse, since it’s a fully featured IDE that is accessible.
In my experience as a general rule java programs that use SWT ...
What's the best way to check if a file exists in C?
...exists
} else {
// file doesn't exist
}
You can also use R_OK, W_OK, and X_OK in place of F_OK to check for read permission, write permission, and execute permission (respectively) rather than existence, and you can OR any of them together (i.e. check for both read and write permission using R...
Printing a variable memory address in swift
...
Swift 2
This is now part of the standard library: unsafeAddressOf.
/// Return an UnsafePointer to the storage used for `object`. There's
/// not much you can do with this other than use it to identify the
/// object
Swift 3
For Swift 3, use withUnsafeP...
dd: How to calculate optimal blocksize? [closed]
...culate the optimal blocksize when running a dd ? I've researched it a bit and I've not found anything suggesting how this would be accomplished.
...
Is the “struct hack” technically undefined behavior?
...
It's not clear if it's legal or portable, but it is rather popular.
and:
... an official interpretation has deemed that it is not strictly conforming with the C Standard, although it does seem to work under all known implementations. (Compilers which check array bounds carefully might iss...
What exactly is Python's file.flush() doing?
...rs created by the runtime/library/language that you're programming against and is meant to speed things up by avoiding system calls for every write. Instead, when you write to a file object, you write into its buffer, and whenever the buffer fills up, the data is written to the actual file using sys...
How to read a file in reverse order?
... line in reversed(open("filename").readlines()):
print line.rstrip()
And in Python 3:
for line in reversed(list(open("filename"))):
print(line.rstrip())
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