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UICollectionView current visible cell index
...n during a short scroll. May or may not be a good thing, depending on what one wants to do.
– ToolmakerSteve
Jun 28 '16 at 12:39
4
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How to compare two floating point numbers in Bash?
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More conveniently
This can be done more conveniently using Bash's numeric context:
if (( $(echo "$num1 > $num2" |bc -l) )); then
…
fi
Explanation
Piping through the basic calculator command bc returns either 1 or 0.
The option -l is equivalent ...
C# DLL config file
... a need to track settings separately for different copies of an app within one user profile, it's very unlikely that you would want all of the different usages of a DLL to share configuration with each other. For this reason, when you retrieve a Configuration object using the "normal" method, the o...
How can I sort arrays and data in PHP?
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Basic one dimensional arrays
$array = array(3, 5, 2, 8);
Applicable sort functions:
sort
rsort
asort
arsort
natsort
natcasesort
ksort
krsort
The difference between those is merely whether key-value associations are kept (the "a"...
Check if a number is int or float
... classes. isinstance checks if a given object is an instance of a class or one of that class's subclasses, so it's perfectly generic. Methinks that isinstance(obj, cls) is equivalent to issubclass(obj.__class__, cls)
– user395760
Dec 27 '10 at 19:33
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Detect viewport orientation, if orientation is Portrait display alert message advising user of instr
I am building a website specifically for mobile devices. There is one page in particular which is best viewed in landscape mode.
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What are the Ruby Gotchas a newbie should be warned about? [closed]
... function as scope resolution operators.
To denote floating point numbers, one must follow with a zero digit (99.0) or an explicit conversion (99.to_f). It is insufficient to append a dot (99.), because numbers are susceptible to method syntax.
Boolean evaluation of non-boolean data is strict: 0, ""...
Makefiles with source files in different directories
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If you have code in one subdirectory dependent on code in another subdirectory, you are probably better off with a single makefile at top-level.
See Recursive Make Considered Harmful for the full rationale, but basically you want make to have t...
Is there a way to ignore header lines in a UNIX sort?
...ile, but it's starting to get ugly enough that it's probably better to use one of the awk-based solutions given in the other responses.
– BobS
Nov 23 '14 at 0:04
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Formatting floats without trailing zeros
...ed Decimal(inputValue).normalize(), but this has a few issues as well. For one, it is A LOT slower (~11x). I also found that although it has pretty great precision, it still suffers from precision loss when using normalize().
>>> Decimal('0.21000000000000000000000000006').normalize()
Decim...