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What is more efficient? Using pow to square or just multiply it with itself?
...cout << elapsed << " "; \
\
return x; \
}
TEST(1, b)
TEST(2, b*b)
TEST(3, b*b*b)
TEST(4, b*b*b*b)
TEST(5, b*b*b*b*b)
template <int exponent>
double testpow(double base, long loops)
{
double x = 0.0;
boost::posix_time::ptime startTime = now();
for (long i=0; i<...
How to write the Fibonacci Sequence?
...urning the Fibonacci numbers between a range (ie. startNumber 1, endNumber 20 should = only those numbers between 1 & 20), I have written for the program to display all Fibonacci numbers between a range (ie. startNumber 1, endNumber 20 displays = First 20 Fibonacci numbers). I thought I had a sure-f...
App Inventor 2 自定义拍照及录像媒体文件的路径，进行目录规整 · App Inventor 2 中文网
...生成 App 鸿蒙 · 一套积木，多端原生打包！ 下载 AI2伴侣 · 安卓/鸿蒙/iOS aia 源码商店 中文社区 中文教育版 各版本对比 关于 关于我们 发布日志 服务条款 ...
how to check the dtype of a column in python pandas
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127
You can access the data-type of a column with dtype:
for y in agg.columns:
if(agg[y].dtype...
Centering the pagination in bootstrap
...t;
<li><a href="?p=1" data-original-title="" title="">2</a></li>
</ul>
</div>
Bootstrap 4 has new class
<div class="text-xs-center">
<ul class="pagination">
<li><a href="?p=0" data-original-title="" title="">1&l...
What do all of Scala's symbolic operators mean?
...to look for them. Or, failing that, look at the index (presently broken on 2.9.1, but available on nightly).
Every Scala code has three automatic imports:
// Not necessarily in this order
import _root_.java.lang._ // _root_ denotes an absolute path
import _root_.scala._
import _root_.scala.Pr...
Java how to replace 2 or more spaces with single space in string and delete leading and trailing spa
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Weighted random numbers
...e items have individual weights:
1) calculate the sum of all the weights
2) pick a random number that is 0 or greater and is less than the sum of the weights
3) go through the items one at a time, subtracting their weight from your random number, until you get the item where the random number is ...
Pandas: create two new columns in a dataframe with values calculated from a pre-existing column
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