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Convert RGB to RGBA over white
...ha value.
Example:
152 converts to an alpha value of (255 - 152) / 255 ~ 0.404
152 scales using (152 - 152) / 0.404 = 0
177 scales using (177 - 152) / 0.404 ~ 62
202 scales using (202 - 152) / 0.404 ~ 123
So, rgb(152, 177, 202) displays as rgba(0, 62, 123, .404).
I have verified in Photoshop t...
Circle drawing with SVG's arc path
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answered Apr 21 '11 at 0:41
Todd MainTodd Main
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How to get a value from a cell of a dataframe?
...ue using the column name:
In [3]: sub_df
Out[3]:
A B
2 -0.133653 -0.030854
In [4]: sub_df.iloc[0]
Out[4]:
A -0.133653
B -0.030854
Name: 2, dtype: float64
In [5]: sub_df.iloc[0]['A']
Out[5]: -0.13365288513107493
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How do you round a number to two decimal places in C#?
... 2); //returns 1.99
decimal b = 1.995555M;
Math.Round(b, 2); //returns 2.00
You might also want to look at bankers rounding / round-to-even with the following overload:
Math.Round(a, 2, MidpointRounding.ToEven);
There's more information on it here.
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.NET String.Format() to add commas in thousands place for a number
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String.Format("{0:n}", 1234); // Output: 1,234.00
String.Format("{0:n0}", 9876); // No digits after the decimal point. Output: 9,876
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Regular expression to match URLs in Java
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106
Try the following regex string instead. Your test was probably done in a case-sensitive manner....
~x + ~y == ~(x + y) is always false?
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edited Jun 20 '12 at 13:47
answered Jun 20 '12 at 2:35
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How to convert 1 to true or 0 to false upon model fetch
... or false into a boolean/tinyint field in the database, which uses 1 or 0 .
4 Answers
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Check time difference in Javascript
...cript Date objects to get their difference:
// use a constant date (e.g. 2000-01-01) and the desired time to initialize two dates
var date1 = new Date(2000, 0, 1, 9, 0); // 9:00 AM
var date2 = new Date(2000, 0, 1, 17, 0); // 5:00 PM
// the following is to handle cases where the times are on the ...
Numpy first occurrence of value greater than existing value
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207
This is a little faster (and looks nicer)
np.argmax(aa>5)
Since argmax will stop at the f...