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How to center a button within a div?

...ticed it's an active answer, however Flexbox would be the correct approach now. Live Demo Vertical and horizontal alignment. #wrapper { display: flex; align-items: center; justify-content: center; } Just horizontal (as long as the main flex axis is horizontal which is default) #wrapper {...
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How can I make my own base image for Docker?

...ocally and import it cat centos6-base.tar | docker import - centos6-base Now you can verify by running it. docker run -i -t centos6-base cat /etc/redhat-release The scripts from dotcloud combine first two steps together which make me confused and looks complicated in the beginning. The docke...
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Insert picture/table in R Markdown [closed]

... add a picture, use: ![Caption for the picture.](/path/to/image.png) I know pandoc supports PNG and JPG, which should meet most of your needs. You do have control over image size if you are creating it in R (e.g., a plot). This can be done either directly in the command to create the image or, e...
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How can I fix the Microsoft Visual Studio error: “package did not load correctly”?

... Developer Command Prompt for VS {version}. devenv.exe is most likely not known in your normal CMD (if you haven‘t added it to the path at least). This Developer Command Prompt takes care of that. It was installed with VS and was in the start menu in my case. – bugybunny ...
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How to get subarray from array?

...[attr]; } return copy; } // With the `clone()` function, you can now do the following: Array.prototype.subarray = function(start, end) { if (!end) { end = this.length; } const newArray = clone(this); return newArray.slice(start, end); }; // Without a copy you will ...
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Do Google refresh tokens expire?

...nd then we could archive their mail (we are required to do so by law), but now as soon as they change their password, the refresh token is revoked. Perhaps for youtube, maps, the refresh token is still truly long lived, but for gmail api, count on a short token. ...
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How to add custom method to Spring Data JPA

... I've followed this answer, unfortunately now Spring Data is trying to find the property "customMethod" on my "Account" object as it is trying to automatically generate a query for all methods defined on the AccountRepository. Any way to stop this? ...
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How do I get AWS_ACCESS_KEY_ID for Amazon?

... just a heads up, you can now view your keys without downloading them through the webpage – lfender6445 Mar 30 '17 at 3:07 add...
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+ operator for array in PHP?

...array("username"=>"John Doe"); $default_vars = array("username"=>"Unknown", "email"=>"no-reply@domain.com"); $config = $user_vars + $default_vars; The $default_vars, as it suggests, is the array for default values. The $user_vars array will overwrite the values defined in $default_vars. ...
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Vim: How to insert in visual block mode?

... to the first character of the first line, but I'm back to normal mode. I know this because if I press "a", it moves the character to the right, and it says "-- INSERT --". If I type a few characters and press escape, it's not applied to the other lines. – Tyler Collier ...