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switch() statement usage
...vor of switch:
# Simplified to only measure the overhead of switch vs if
test1 <- function(type) {
switch(type,
mean = 1,
median = 2,
trimmed = 3)
}
test2 <- function(type) {
if (type == "mean") 1
else if (type == "median") 2
else if (type == "trimmed") 3
}
syst...
Eclipse will not start and I haven't changed anything
...
To add - if you are testing a plugin and get this problem then you need to remove the plugin equivalent, which on my machine was: Eclipse/runtime-EclipseApplication/.metadata/.plugins/org.eclipse.e4.workbench/workbench.xml
–...
How to make shallow git submodules?
...bmodule(s) are huge and you're not really interested in anything but the latest commit.
Tests are added and some indention adjustments were made to conform to the rest of the testfile on "submodule update can handle symbolic links in pwd".
Signed-off-by: Fredrik Gustafsson <iveqy@iveqy....
NumPy array initialization (fill with identical values)
...n); a.fill(5) is fastest.
In descending speed order:
%timeit a=np.empty(1e4); a.fill(5)
100000 loops, best of 3: 5.85 us per loop
%timeit a=np.empty(1e4); a[:]=5
100000 loops, best of 3: 7.15 us per loop
%timeit a=np.ones(1e4)*5
10000 loops, best of 3: 22.9 us per loop
%timeit a=np.repeat(5,(1...
研究：[url]https://peterzhong1219.gitee.io/webpages/%E5%A6%82%E4%BD%95...
研究：https://peterzhong1219.gitee.io/ ... App%20Inventor.htmlhttps://qastack.cn/programming/1 ... up-the-gwt-compiler已研究，已解决问题。
Android ListView Divider
.../apk/res/android" android:shape="line">
<stroke android:color="#8F8F8F" android:dashWidth="1dp" android:dashGap="1dp" />
</shape>
OR:
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
<solid android:color="#8F8F8F"/>...
How to change the style of the title attribute inside an anchor tag?
...ow: 0px 0px 4px #222;
background-image: -moz-linear-gradient(top, #f8f8f8, #cccccc);
background-image: -webkit-gradient(linear,left top,left bottom,color-stop(0, #f8f8f8),color-stop(1, #cccccc));
background-image: -webkit-linear-gradient(top, #f8f8f8, #cccccc);
background-i...
Number of days in particular month of particular year?
...h.of(1999, 2);
int daysInMonth = yearMonthObject.lengthOfMonth(); //28
Test: try a month in a leap year:
yearMonthObject = YearMonth.of(2000, 2);
daysInMonth = yearMonthObject.lengthOfMonth(); //29
Java 7 and earlier
Create a calendar, set year and month and use getActualMaximum
int iYear ...
Regular expression to match numbers with or without commas and decimals in text
...r, we checked at the beginning to make sure the whole thing wasn't blank.
Tested here: http://rextester.com/YPG96786
This will allow things like:
100,000
999.999
90.0009
1,000,023.999
0.111
.111
0
It will block things like:
1,1,1.111
000,001.111
999.
0.
111.110000
1.1.1.111
9.909,888
There are se...
Is R's apply family more than syntactic sugar?
...ferent numbers to you - the for loop improves considerably: for your three tests, I get 2.798 0.003 2.803; 4.908 0.020 4.934; 1.498 0.025 1.528, and vapply is even better: 1.19 0.00 1.19
– naught101
Jun 26 '12 at 7:11
...