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How to include (source) R script in other scripts
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There is no such thing built-in, since R does not track calls to source and is not able to figure out what was loaded from where (this is not the case when using packages). Yet, you may use same idea as in C .h files, i.e. wrap the whole in:
if(!exists('util_R')){
util_R<-T
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Performance - Date.now() vs Date.getTime()
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These things are the same (edit semantically; performance is a little better with .now()):
var t1 = Date.now();
var t2 = new Date().getTime();
However, the time value from any already-created Date instance is frozen at the time of its construction (or at whatev...
Android应用开发性能优化完全分析 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...含内部调运的子方法）执行的真实时间，ms单位；
Calls+Recur Calls/Total
当前方法被调运的次数及递归调运占总调运次数百分比；
CPU Time/Call
当前方法调运CPU时间与调运次数比，即当前方法平均执行CPU耗时时间；
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Why does this code segfault on 64-bit architecture but work fine on 32-bit?
... a platform where sizeof(int)==sizeof(int*) holds true, for example if the calling convention used different registers for returning pointers than integers)
The comp.lang.c FAQ has an entry discussing why casting the return from malloc is never needed and potentially bad.
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How to raise a ValueError?
...# -> 6
print(contains('bababa', 'k')) # ->
Traceback (most recent call last):
File "how-to-raise-a-valueerror.py", line 15, in <module>
print(contains('bababa', 'k'))
File "how-to-raise-a-valueerror.py", line 12, in contains
raise ValueError('could not find {} in {}'.forma...
Literal notation for Dictionary in C#?
...> object first as the shortcut syntax is translated to a bunch of Add() calls (like your code):
var data = new Dictionary<string, string>
{
{ "test", "val" },
{ "test2", "val2" }
};
In C# 6, you now have the option of using a more intuitive syntax with Dictionary as well as any ...
Xcode Debugger: view value of variable
...ovide useful information;
Declared properties could be shown up in a group called properties and allow for (optional) inspection directly in the debugger window. This would also slow down the debugger because of the need to send a message/execute a method in order to get information, but would provi...
Optimising Android application before release [closed]
...s updated often. And TextView performs allocations internally whenever you call setText() with a CharSequence. But it doesn't allocate anything with the setText(char[] text, int start, int len) variant. This isn't documented, and no one answered when I asked about it.
There are many ones like this...
HttpURLConnection timeout settings
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N.B. !!! you need to call setConnectTimeout before any of the methods that implicitly connect (basically all the methods that throw IllegalStateException if already connected). Ideally make setConnectTimeout (readTimeout) the first methods called...
top -c command in linux to filter processes listed based on processname
...genevd said, this will not work for new processes started after the top is called. Is there any way to do so? I need to run several programs with the same prefix on its name, and I would love to see how many of them are running in a live way, not needing to execute a new top (or just a ps) every tim...