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Calculate difference between two datetimes in MySQL
...L in, datetime -type filed. When users logs in, I want to get the difference between the last login time and the current time (which I get using NOW() ).
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JavaScript: empty array, [ ] evaluates to true in conditional structures. Why is this?
I was encountering a lot of bugs in my code because I expected this expression:
2 Answers
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sed error: “invalid reference \1 on `s' command's RHS”
I run several substitution commands as the core of a colorize script for maven .
One of the sed commands uses a regular expression which works find in the shell as discussed here . The current (not working) implementation can be found here .
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Selecting multiple classes with jQuery
I’ve had a good look and can’t seem to find out how to select all elements matching certain classes in one jQuery selector statement such as this:
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How do I access this object property with an illegal name?
I'm using a PHP class someone wrote to interface with the BaseCamp API.
2 Answers
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How to toggle a boolean?
Is there a really easy way to toggle a boolean value in javascript ?
6 Answers
6
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Efficiently checking if arbitrary object is NaN in Python / numpy / pandas?
...to designate missing values. As I iterate over the data set, I need to detect such missing values and handle them in special ways.
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What is the difference between “Include Directories” and “Additional Include Directories”
In configuration properties of my project, under the "VC++ directories" there is an entry for "Include Directories". But under "C/C++" option, there is another entry called "Additional Include Directories". Same thing happens with library directories.
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target input by type and name (selector)
I need to change some checkbox inputs to hidden inputs for some but not all inputs on a page.
3 Answers
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