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Getting the first character of a string with $str[0]
I want to get the first letter of a string and I've noticed that $str[0] works great. I am just not sure whether this is 'good practice', as that notation is generally used with arrays. This feature doesn't seem to be very well documented so I'm turning to you guys to tell me if it's all right –...
Is it possible to declare two variables of different types in a for loop?
... to unpack a tuple like so:
for (auto [i, f, s] = std::tuple{1, 1.0, std::string{"ab"}}; i < N; ++i, f += 1.5) {
// ...
}
The above will give you:
int i set to 1
double f set to 1.0
std::string s set to "ab"
Make sure to #include <tuple> for this kind of declaration.
You can spe...
“Pretty” Continuous Integration for Python
...plus install the local package
call_command("%sbin/pip install -e ./ --extra-index %s" % (venvDir, UPLOAD_REPO),
options.workspace)
#make sure pylint, nose and coverage are installed
call_command("%sbin/pip install nose pylint coverage epydoc" % venvDir,
...
Performance of Arrays vs. Lists
...ts; i++ )
{
j = theList[i];
}
chrono.Stop ();
Console.WriteLine (String.Format("iterating the List took {0} msec", chrono.ElapsedMilliseconds));
chrono.Reset();
chrono.Start();
for( int i = 0; i < numberOfElements; i++ )
{
j = theArray[i];
}
chrono.Stop ();
Console.Write...
Convert stdClass object to array in PHP
...error because you'll be giving an object to a function that expects a JSON string as its input. In the answer, I am converting the object to a JSON string, and then feeding it as an input to json_decode() so it would return an array (the second parameter being as True indicates an array should be re...
How to get the CPU Usage in C#?
...nceCounter("Memory", "Available MBytes");
Consume like this:
public string getCurrentCpuUsage(){
return cpuCounter.NextValue()+"%";
}
public string getAvailableRAM(){
return ramCounter.NextValue()+"MB";
}
...
jsonify a SQLAlchemy result set in Flask [duplicate]
...alized.
def dump_datetime(value):
"""Deserialize datetime object into string form for JSON processing."""
if value is None:
return None
return [value.strftime("%Y-%m-%d"), value.strftime("%H:%M:%S")]
class Foo(db.Model):
# ... SQLAlchemy defs here..
def __init__(self, ....
Most efficient way to remove special characters from string
I want to remove all special characters from a string. Allowed characters are A-Z (uppercase or lowercase), numbers (0-9), underscore (_), or the dot sign (.).
...
Convert a Unicode string to a string in Python (containing extra symbols)
How do you convert a Unicode string (containing extra characters like £ $, etc.) into a Python string?
9 Answers
...
__FILE__, __LINE__, and __FUNCTION__ usage in C++
...Y_FUNCTION__ when it's available for the extra class scoping.
PS:
static string getScopedClassMethod( string thePrettyFunction )
{
size_t index = thePrettyFunction . find( "(" );
if ( index == string::npos )
return thePrettyFunction; /* Degenerate case */
thePrettyFunction . erase( in...