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Is there a way to instantiate objects from a string holding their class name?
...ject to port old MacApp to C++ and X11. In the effort of it Eric Gamma etc started to think about Design Patterns
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How do I set a variable to the output of a command in Bash?
...implemented for this
myPi=$(bc -l <<<'4*a(1)')
Nested sample:
SysStarted=$(date -d "$(ps ho lstart 1)" +%s)
echo $SysStarted
1480656334
bash features
There is an elegent way:
users=()
while IFS=: read -u $list user pass uid gid name home bin ;do
((uid>=500)) &&
pri...
Payment Processors - What do I need to know if I want to accept credit cards on my website? [closed]
...u will be better off using Paypal or another type of service.
The process starts by getting a merchant account setup and tied to your bank account. You may want to check with your bank, because a lot of major banks provide merchant services. You may be able to get deals, because you are already a...
How to check if a table exists in a given schema
...mpany specific tables in company schema.
company schema names always start with 'company' and end with the company number.
So there may be schemas like:
...
How dangerous is it to access an array out of bounds?
...stop it into a defined state. However if it does not crash then the issues start to arise. Which resources are under control of your program and what might it do to them? Which resources might get under control of your program and what might it do to them? I know at least one major issue that was ca...
Using the field of an object as a generic Dictionary key
..., but make sure two equals Foos have the same hash code. You might want to start with the Equals-Method and then (in GetHashCode()) xor the hash code of every member you compare in Equals.
public class Foo {
public string A;
public string B;
override bool Equals(object other) {
...
Android ListView with different layouts for each row
...there's functionality in a subclass that's useful to your purpose. If so, start with that subclass; if not, move up to BaseAdapter. Deriving from BaseAdapter would be the most "flexible", but would be the worst at code reuse and maturity since it doesn't take advantage of the knowledge and maturity...
Python (and Python C API): __new__ versus __init__
... the only benefit of the __new__ method is that the instance variable will start out as an empty string, as opposed to NULL. But why is this ever useful, since if we cared about making sure our instance variables are initialized to some default value, we could have just done that in the __init__ met...
Understanding implicit in Scala
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I had the exact same question as you had and I think I should share how I started to understand it by a few really simple examples (note that it only covers the common use cases).
There are two common use cases in Scala using implicit.
Using it on a variable
Using it on a function
Examples are...
Why are Perl 5's function prototypes bad?
... most things people guess about Perl, they turn out to be wrong.
However, starting with Perl v5.20, Perl has a feature, experimental as I write this, that gives something more like what users expect and what. Perl's subroutine signatures does run time argument counting, variable assigning, and defa...