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How to check if a file exists in Documents folder?
...plication with In-App Purchase, that when the user buy something, download one html file into the Documents folder of my app.
...
Removing the title text of an iOS UIBarButtonItem
...itle: "", style: .plain, target: nil, action: nil)
To be clear, this is done on the view controller that you would see if you hit the back button. i.e. instead of seeing '< Settings' you want to just see '<' then on your SettingsViewController you would put this in your init. Then you don't ...
How do I set a variable to the output of a command in Bash?
...
In addition to backticks `command`, command substitution can be done with $(command) or "$(command)", which I find easier to read, and allows for nesting.
OUTPUT=$(ls -1)
echo "${OUTPUT}"
MULTILINE=$(ls \
-1)
echo "${MULTILINE}"
Quoting (") does matter to preserve multi-line variabl...
What are rvalues, lvalues, xvalues, glvalues, and prvalues?
...ue is
also a prvalue. —end example ]
Every
expression belongs to exactly one of
the fundamental classifications in
this taxonomy: lvalue, xvalue, or
prvalue. This property of an
expression is called its value
category. [ Note: The discussion of
each built-in operator in Clause 5
indicates the cate...
What does multicore assembly language look like?
...pic - so questions can linger. There are a few examples of complete "bare bones" kernels in the wild that boot from USB drives or "floppy" disks - here's an x86_32 version written in assembler using the old TSS descriptors that can actually run multi-threaded C code (github.com/duanev/oz-x86-32-asm-...
Semicolon before self-invoking function? [duplicate]
...eginning of each statement in case the previous statement doesn't end with one?
– Brandon Gano
Mar 27 '15 at 23:43
4
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Parse email content from quoted reply
...wrote" or prefix the lines with an angle bracket. Unfortunately, not everyone does this. Does anyone have any idea on how to programmatically detect reply text? I am using C# to write this parser.
...
What is the best way to concatenate two vectors?
...
@boycy No. It is amortized constant time to push_back one element. To push back n elements is O(n)
– Konrad Lindenbach
Mar 12 '16 at 1:47
1
...
Function overloading by return type?
... to what others are saying, overloading by return type is possible and is done by some modern languages. The usual objection is that in code like
int func();
string func();
int main() { func(); }
you can't tell which func() is being called. This can be resolved in a few ways:
Have a predictab...
How do you detect where two line segments intersect? [closed]
...imilarly a vector parallel to the z axis. So... do I just divide the z component by the other z component? Is the formula for t actually |(q − p) × s| / |(r × s)|?
– LarsH
Aug 31 '12 at 3:40
...