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Converting RGB to grayscale/intensity
... 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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How to use mysql JOIN without ON condition?
Is it possible to write join query without ON statement? and how do these joins differ LEFT JOIN, RIGHT JOIN works.
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Python: Convert timedelta to int in a dataframe
I would like to create a column in a pandas data frame that is an integer representation of the number of days in a timedelta column. Is it possible to use 'datetime.days' or do I need to do something more manual?
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Open link in new tab or window [duplicate]
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You should add the target="_blank" and rel="noopener noreferrer" in the anchor tag.
For example:
<a target="_blank" rel="noopener noreferrer" href="http://your_url_here.html">Link</a>
Adding rel="noopener noreferrer" is not mandatory, but it's ...
Any way to exit bash script, but not quitting the terminal
When I use exit command in a shell script, the script will terminate the terminal (the prompt). Is there any way to terminate a script and then staying in the terminal?
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Which is preferred: Nullable.HasValue or Nullable != null?
...eal difference. Just do whichever is more readable/makes more sense to you and your colleagues.
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Can I set max_retries for requests.request?
The Python requests module is simple and elegant but one thing bugs me.
It is possible to get a requests.exception.ConnectionError with a message like:
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How may I sort a list alphabetically using jQuery?
I'm a bit out of my depth here and I'm hoping this is actually possible.
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Do the JSON keys have to be surrounded by quotes?
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Yes, you need quotation marks. This is to make it simpler and to avoid having to have another escape method for javascript reserved keywords, ie {for:"foo"}.
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Eclipse Android and gitignore
...itHub, it also includes amongst other things the .project, I disagree here and want your opinion. Scenario: I added new classes to my project. When I pulled from another machine, they were not in the project. Please check it out: github.com/github/gitignore/blob/master/Global/…
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