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- how to allow only one item selected?

... Just don't make it a select multiple, but set a size to it, such as: <select name="user" id="userID" size="3"> <option>John</option> <option>Paul</option> <option>Ringo</option...
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Usage of sys.stdout.flush() method

What does sys.stdout.flush() do? 6 Answers 6 ...
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How can I map True/False to 1/0 in a Pandas DataFrame?

...lculations I need 1/0 representation. Is there a quick pandas/numpy way to do that? 6 Answers ...
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How to use auto-layout to move other views when a view is hidden?

...ls displayed in my cell and sometimes only two labels. What I am trying to do is to set constraints that way if I set UIView property to hidden or I will remove it from superview the two labels will move to the left. I tried to set UIView leading constraint to Superview (Cell content) for 10px and U...
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Print Current Mercurial Revision Hash?

...ebug id -i if you want template support use hg parent --template '{node}' Do not use hg log -l 1, its the latest repository changeset, not the current working copy changeset. – Joseph Lisee Jun 11 '12 at 17:33 ...
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How to reload page every 5 seconds?

... <meta http-equiv="refresh" content="5; URL=http://www.yourdomain.com/yoursite.html"> If it has to be in the script use setTimeout like: setTimeout(function(){ window.location.reload(1); }, 5000); s...
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How to parse float with two decimal places in javascript?

...So 10 would be 10.00. Or if it equals 10.6 would be 10.60. Not sure how to do this. 16 Answers ...
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bash: Bad Substitution

...ang line will be ignored and the script will be interpreted by dash, which does not support that string substitution syntax. share | improve this answer | follow ...
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Can CSS detect the number of children an element has?

...is technique goes to André Luís (discovered) & Lea Verou (refined). Don't you just love CSS3? ???? CodePen Example: https://codepen.io/mattlubner-the-decoder/pen/ExaQZQR Sources: http://andr3.net/blog/post/142 (André Luís) http://lea.verou.me/2011/01/styling-children-based-on-their-n...
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How to empty (“truncate”) a file on linux that already exists and is protected in someway?

...he noclobber option set. The error looks like it's from csh, so you would do: cat /dev/null >! file If I'm wrong and you are using bash, you should do: cat /dev/null >| file in bash, you can also shorten that to: >| file ...