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What are C++ functors and their uses?
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⁺¹ for mentioning that the name have been made up for no reason. I've just been searching for what's the relation between mathematical (or functional if you want) functor and the one from C++.
– Hi-Angel...
Why does datetime.datetime.utcnow() not contain timezone information?
...ion includes examples of code to implement it, but they don't include that functionality in datetime itself! docs.python.org/2/library/datetime.html#datetime.tzinfo.fromutc
– L S
Sep 1 '16 at 22:18
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Disable validation of HTML5 form elements
In my forms, I'd like to use the new HTML5 form types, for example <input type="url" /> ( more info about the types here ).
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How to concatenate twice with the C preprocessor and expand a macro as in “arg ## _ ## MACRO”?
I am trying to write a program where the names of some functions are dependent on the value of a certain macro variable with a macro like this:
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How do I compute derivative using Numpy?
How do I calculate the derivative of a function, for example
8 Answers
8
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How do I associate a Vagrant project directory with an existing VirtualBox VM?
.../mitchellh/vagrant/issues/1755 for details
– Mads Mobæk
May 23 '13 at 9:13
1
I was looking for ....
How to sum a variable by group
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Using aggregate:
aggregate(x$Frequency, by=list(Category=x$Category), FUN=sum)
Category x
1 First 30
2 Second 5
3 Third 34
In the example above, multiple dimensions can be specified in the list. Multiple aggregated metrics of the same data type can be incorporated via cbind:
ag...
App Inventor 2 App上架国内应用市场完整指南 · App Inventor 2 中文网
...服务及咨询：App上架国内应用市场及知识产权保护指南
fun123.cn 提供安全合规保障、软著代申请、隐私政策组件等一站式服务。
一、上架前置条件
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How does the “this” keyword work?
...t("I'm evaluated in the initial global execution context!");
setTimeout(function () {
alert("I'm NOT evaluated in the initial global execution context.");
}, 1);
</script>
When evaluating code in the initial global execution context, ThisBinding is set to the global object, window ...
Date format Mapping to JSON Jackson
... edited Sep 15 '17 at 4:08
buræquete
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answered Nov 24 '14 at 10:02
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