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How do you round a floating point number in Perl?
...t
route.
printf("%.3f", 3.1415926535); # prints 3.142
The POSIX module (part of the standard Perl distribution) implements
ceil(), floor(), and a number of other mathematical and trigonometric
functions.
use POSIX;
$ceil = ceil(3.5); # 4
$floor = f...
Cannot install Lxml on Mac os x 10.9
I want to install Lxml so I can then install Scrapy.
23 Answers
23
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C# list.Orderby descending
...
Sure:
var newList = list.OrderByDescending(x => x.Product.Name).ToList();
Doc: OrderByDescending(IEnumerable, Func).
In response to your comment:
var newList = list.OrderByDescending(x => x.Product.Name)
.ThenBy(x => x.Product.Price)
...
Pandas convert dataframe to array of tuples
...out:
subset = data_set[['data_date', 'data_1', 'data_2']]
tuples = [tuple(x) for x in subset.to_numpy()]
for pandas < 0.24 use
tuples = [tuple(x) for x in subset.values]
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How fast is D compared to C++?
...ks like neither dmd nor gdc inlined scalar_product, but g++/gdc did emit MMX instructions, so they might be auto-vectorizing the loop.
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How to count the frequency of the elements in an unordered list?
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155
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Android: Generate random color on click?
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Random rnd = new Random();
paint.setARGB(255, rnd.nextInt(256), rnd.nextInt(256), rnd.nextInt(256));
or
Random rnd = new Random();
int color = Color.argb(255, rnd.nextInt(256), rnd.nextInt(256), rnd.nextInt(256));
view.setBackgroundColor(color);
Though in your case i...
Sort array of objects by single key with date value
...
You can use Array.sort.
Here's an example:
var arr = [{
"updated_at": "2012-01-01T06:25:24Z",
"foo": "bar"
},
{
"updated_at": "2012-01-09T11:25:13Z",
"foo": "bar"
},
{
"updated_at": "2012-01-05T04:13:24Z",
"foo": "...
Create space at the beginning of a UITextField
I want to leave a bit of space at the beginning of a UITextField, just like here:
Add lefthand margin to UITextField
21 An...
Replacing Pandas or Numpy Nan with a None to use with MysqlDB
...null(df), None)
Note: this changes the dtype of all columns to object.
Example:
In [1]: df = pd.DataFrame([1, np.nan])
In [2]: df
Out[2]:
0
0 1
1 NaN
In [3]: df1 = df.where(pd.notnull(df), None)
In [4]: df1
Out[4]:
0
0 1
1 None
Note: what you cannot do recast the DataFr...