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Is there a way to perform “if” in python's lambda
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David WoleverDavid Wolever
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App Inventor 2 低功耗蓝牙(BLE) 硬件接入、数据通信及IO控制 · App Inventor 2 中文网
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'npm' is not recognized as internal or external command, operable program or batch file
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123
Don't forget to reboot your computer after installing node! That one got me.
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C++ semantics of `static const` vs `const`
...anks, though I don't think this is a chance in C++17 compared even with C++98, and the question was asked in 2010. Moreover, your answer deals only with static as a linkage specifier (at namespace scope), and the question asked specifically about the semantics in different contexts.
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What does 'const static' mean in C and C++?
...to static at namespace level (and some gave wrong information). See the C++98 standard section 3.5.3.
First some background:
Translation unit: A source file after the pre-processor (recursively) included all its include files.
Static linkage: A symbol is only available within its translation unit...
Remove duplicated rows
...for larger data sets
library(microbenchmark)
library(data.table)
set.seed(123)
DF <- as.data.frame(matrix(sample(1e8, 1e5, replace = TRUE), ncol = 10))
DT <- copy(DF)
setDT(DT)
microbenchmark(unique(DF), unique(DT))
# Unit: microseconds
# expr min lq mean median ...
In HTML5, is the localStorage object isolated per page/domain?
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Mark Amery
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answered Nov 22 '10 at 6:52
sebarmelise...
How do I pre-populate a jQuery Datepicker textbox with today's date?
...k and doesn't make jQuery search the DOM twice.
– abc123
Aug 1 '13 at 20:36
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Great, accepted ans...
Resolving ambiguous overload on function pointer and std::function for a lambda using +
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98
The + in the expression +[](){} is the unary + operator. It is defined as follows in
[expr.una...
Getting URL hash location, and using it in jQuery
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Mark Amery
98.9k4848 gold badges336336 silver badges379379 bronze badges
answered Nov 30 '09 at 21:46
Christian ...