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What is the preferred/idiomatic way to insert into a map?
...ossible to fit them into this answer. For a more precise and comprehensive description, I recommend reading this article on Fluent C++.
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Why Func instead of Predicate?
...ndered this before. I like the Predicate<T> delegate - it's nice and descriptive. However, you need to consider the overloads of Where:
Where<T>(IEnumerable<T>, Func<T, bool>)
Where<T>(IEnumerable<T>, Func<T, int, bool>)
That allows you to filter based on...
bash HISTSIZE vs. HISTFILESIZE?
... list to $HISTFILE. If the histappend shell option is enabled (see the description of shopt under SHELL BUILTIN COMMANDS below), the
lines are appended to the
history file, otherwise the history file is overwritten. If HISTFILE is unset, or if the history file is unwritable, the hist...
Abstract class in Java
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@Imagist -1 for wrong description for the statement c.implementedMethod(); // prints "implementedMethod()", It will print "Overriden!" always
– Sachin Kumar
Feb 5 '15 at 10:05
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Using Java 8's Optional with Stream::flatMap
...e out what it was doing, and it also took me a while to write up the above description of what it was doing. The key subtlety is the transformation from Optional<Other> to Optional<Stream<Other>>. Once you grok this it makes sense, but it wasn't obvious to me.
I'll acknowledge, th...
Is there a naming convention for MySQL?
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MySQL has a short description of their more or less strict rules:
https://dev.mysql.com/doc/internals/en/coding-style.html
Most common codingstyle for MySQL by Simon Holywell:
http://www.sqlstyle.guide/
See also this question:
Are there an...
What is the best way to deal with the NSDateFormatter locale “feechur”?
... string = dateFormatter.string(from: date)
return string
} }
usage description:
let date = DateFormatter.getDateFromString(string: "11-07-2001”, fromFormat: "dd-MM-yyyy")
print("custom date : \(date)")
let dateFormatter = DateFormatter.initWithSafeLocale(withDateFormat: "yyyy-MM-dd HH:mm:...
Why hasn't functional programming taken over yet?
... completely.
Imperative and object-oriented programming is a step-by-step description of the problem and its solution. As such, it can be easier to comprehend. Functional programming can be a bit obscure.
Ultimately, a useful program will always have side effects (like providing actual output to...
What kind of leaks does automatic reference counting in Objective-C not prevent or minimize?
...eywords related to this bridging have been added, and Mike Ash has a great description of various bridging cases in his lengthy ARC writeup.
In addition to this, there are several other less frequent, but still potentially problematic cases, which the published specification goes into in detail.
M...
Rename specific column(s) in pandas
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Use the pandas.DataFrame.rename funtion.
Check this link for description.
data.rename(columns = {'gdp': 'log(gdp)'}, inplace = True)
If you intend to rename multiple columns then
data.rename(columns = {'gdp': 'log(gdp)', 'cap': 'log(cap)', ..}, inplace = True)
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