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MySQL, Check if a column exists in a table with SQL
... query that will check if a specific table in MySQL has a specific column, and if not — create it. Otherwise do nothing. This is really an easy procedure in any enterprise-class database, yet MySQL seems to be an exception.
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Git: Cannot see new remote branch
A colleague pushed a new remote branch to origin/dev/homepage and I cannot see it when I run:
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What is the difference between server side cookie and client side cookie?
What is the difference between creating cookies on the server and on the client? Are these called server side cookies and client side cookies? Is there a way to create cookies that can only be read on the server or on the client?
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How to tell whether a point is to the right or left side of a line
...o separate them into 2 distinct sets. To do this, I choose two points ( a and b ) and draw an imaginary line between them. Now I want to have all points that are left from this line in one set and those that are right from this line in the other set.
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How to determine if a decimal/double is an integer?
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IMHO, the modulus operator and floating point numbers just don't mix in any way useful. The code suggested is incredibly confusing given the number of keystrokes used and will work almost nowhere outside of .NET languages. I would bet it's also much sl...
Overflow-x:hidden doesn't prevent content from overflowing in mobile browsers
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Creating a site wrapper div inside the <body> and applying the overflow-x:hidden to the wrapper instead of the <body> or <html> fixed the issue.
It appears that browsers that parse the <meta name="viewport"> tag simply ignore overflow attributes on t...
Pagination in a REST web application
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In my mind, page is a floating concept, and not related to the underlying domain. And therefore should not be considered as a resource. I mean floating in the sense that it is fluid, that the concept of page changes with the context; one user of your API may be a m...
What is the difference D3 datum vs. data?
Can someone please explain the difference between datum() and data() in D3.js? I see both being used and I am not sure why you should choose one over the other?
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Is it possible to have multiple statements in a python lambda expression?
...s a version of sort that creates a new list, rather than sorting in-place, and can be chained. Note that this is probably what you should be using - it's bad practice for your map to have side effects on the original list.
Q. How should I get the second lowest item from each list in a sequence of ...
Specifying rails version to use when creating a new application
I have two versions of rails (2.1.0 and 2.2.2) installed in my computer.
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