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Semi-transparent color layer over background-image?

I have a DIV and I would like to put a pattern as background. This pattern is gray. So to make it a little more nice, I would like to put a light transparent color "layer" over. Below is what I tried but which did not work. Is there a way to put the colored layer over the background image? ...
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Email Address Validation in Android on EditText [duplicate]

How can we perform Email Validation on edittext in android ? I have gone through google & SO but I didn't find out a simple way to validate it. ...
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In Python, how do I convert all of the items in a list to floats?

I have a script which reads a text file, pulls decimal numbers out of it as strings and places them into a list. 12 Answers...
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Converting RGB to grayscale/intensity

When converting from RGB to grayscale, it is said that specific weights to channels R, G, and B ought to be applied. These weights are: 0.2989, 0.5870, 0.1140. ...
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Apply pandas function to column to create multiple new columns?

How to do this in pandas: 13 Answers 13 ...
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How do you push a Git tag to a branch using a refspec?

I want to force push, for example, my tag 1.0.0 to my remote master branch. 4 Answers ...
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remove None value from a list without removing the 0 value

This was my source I started with. 10 Answers 10 ...
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Apply a function to every row of a matrix or a data frame

Suppose I have a n by 2 matrix and a function that takes a 2-vector as one of its arguments. I would like to apply the function to each row of the matrix and get a n-vector. How to do this in R? ...
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Django Server Error: port is already in use

Restarting the Django server displays the following error: 16 Answers 16 ...
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Replace all 0 values to NA

I have a dataframe with some numeric columns. Some row has a 0 value which should be considered as null in statistical analysis. What is the fastest way to replace all the 0 value to NULL in R? ...