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How can I convert a std::string to int?
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In C++11 there are some nice new convert functions from std::string to a number type.
So instead of
atoi( str.c_str() )
you can use
std::stoi( str )
where str is your number as std::string.
There are version for all flavours of numbers:
long stol(string), float stof(...
“Parse Error : There is a problem parsing the package” while installing Android application
... Hi, I am facing a similar problem. I am downloading the application from a web link. It sits on the mobile SDCard perfectly. But when I am trying to install it is showing this error. I didn't sign my application, basically I am a newbie to Android app development. Help of any sort is apprecia...
NoClassDefFoundError: android.support.v7.internal.view.menu.MenuBuilder
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I've been using a solution from that issue report for months now and all of the sudden after updating to the latest support libraries and sdk 23 I've started getting this new report on crashlytics: java.lang.NoClassDefFoundError: android.support.v7.int...
Does Haskell require a garbage collector?
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In this case, a simplistic escape analysis would conclude that x2 escapes from f (because it is returned in the tuple), and hence x2 must be allocated on the garbage-collected heap. Region inference, on the other hand, is able to detect that x2 can be deallocated when g returns; the idea here is th...
What is a sensible way to layout a Go project [closed]
... # test source
Update July 2014: see "Structuring Applications in Go" from Ben Johnson
That article include tips like:
Separate your binary from your application
combining the main.go file and my application logic in the same package has two consequences:
It makes my application u...
How to validate an Email in PHP?
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Stay away from regex and filter_var() solutions for validating email. See this answer: https://stackoverflow.com/a/42037557/953833
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List comprehension vs map
...ust to iterate. The same argument holds for filter and reduce and anything from the itertools module: if you already have a function handy, you could go ahead and do some functional programming. This gains readability in some situations, and loses it in others (e.g. novice programmers, multiple argu...
Is delete this allowed?
... phone call, something takes note of that and creates a phone_call object. From that point onward, the phone_call object handles the details of the phone call (making a connection when you dial, adding an entry to the database to say when the call started, possibly connect more people if you do a co...
Why is Double.MIN_VALUE in not negative
... a constant representing the least possible value as it is simply a - away from MAX_VALUE :-)
(Note, there is also Double.NEGATIVE_INFINITY but I'm disregarding from this, as it is to be seen as a "special case" and does not in fact represent any actual number.)
Here is a good text on the subject....
jsonify a SQLAlchemy result set in Flask [duplicate]
...at this question. It shows how to discover columns programmatically. So, from that I created the code below. It works for me, and I'll be using it in my web app. Happy coding!
def to_json(inst, cls):
"""
Jsonify the sql alchemy query result.
"""
convert = dict()
# add your ...