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What's the difference between lapply and do.call?
I'm learning R recently and confused by two function: lapply and do.call . It seems that they're just similar to map function in Lisp. But why are there two functions with such a different name? Why doesn't R just use a function called map ?
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Switch statement for greater-than/less-than
... 7.8 6.7 9.5 16.0 15.0 4.9
Test where performed on Windows 7 32bit with the folowing versions: Chrome 21.0.1180.89m, Firefox 15.0, Opera 12.02, MSIE 9.0.8112, Safari 5.1.7. Node was run on a Linux 64bit box because the timer resolution on Node.js for Windows was 10ms instead of ...
How do I write a for loop in bash
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From this site:
for i in $(seq 1 10);
do
echo $i
done
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Emulate a do-while loop in Python?
I need to emulate a do-while loop in a Python program. Unfortunately, the following straightforward code does not work:
16 ...
Coffeescript — How to create a self-initiating anonymous function?
... just use parentheses (e.g. (-> foo)(), you can avoid them by using the do keyword:
do f = -> console.log 'this runs right away'
The most common use of do is capturing variables in a loop. For instance,
for x in [1..3]
do (x) ->
setTimeout (-> console.log x), 1
Without the do...
Function passed as template argument
...solution is something like this instead:
template <typename F>
void doOperation(F f)
{
int temp=0;
f(temp);
std::cout << "Result is " << temp << std::endl;
}
which can now be called as either:
doOperation(add2);
doOperation(add3());
See it live
The problem with t...
MQTT物联网协议完全实践指南 · App Inventor 2 中文网
...例：
// 设置不同QoS级别发布消息
when Button_PublishQoS0.Click
do
call UrsPahoMqttClient1.Publish "sensor/temperature", "25.6", 0
when Button_PublishQoS1.Click
do
call UrsPahoMqttClient1.Publish "control/light", "ON", 1
when Button_PublishQoS2.Click
do
call UrsPahoMqttClient...
Emulating a do-while loop in Bash
What is the best way to emulate a do-while loop in Bash?
4 Answers
4
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How to deal with cyclic dependencies in Node.js
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While node.js does allow circular require dependencies, as you've found it can be pretty messy and you're probably better off restructuring your code to not need it. Maybe create a third class that uses the other two to accomplish what yo...
Why use apparently meaningless do-while and if-else statements in macros?
...I'm seeing the code of the macro wrapped in what seems like a meaningless do while loop. Here are examples.
9 Answers
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