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Finding duplicate values in MySQL
...g "return the second row"). EXISTS would only return true if the aforementioned second row exists (i. e. there are at least two rows with the same value of varchar_column) .
Having an index on varchar_column will, of course, speed up this query greatly.
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Make $JAVA_HOME easily changable in Ubuntu [closed]
...vironment variables in a way that affects a particular user's environment, one should not place commands to set their values in particular shell script files in the user's home directory, but use:
~/.pam_environment - This file is specifically meant for setting a user's environment. It is not a...
Why does Javascript getYear() return 108?
... at least, it makes more sense to use a standard module for date-handling, one which uses real four-digit years. Not sure what might be available for JavaScript.
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How to implement LIMIT with SQL Server?
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Problem with this one is, it doesn't handle WHERE clauses very well... I'm going to try temp tables, as its not working for me.
– nasty pasty
Nov 3 '09 at 5:09
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Plot two histograms on single chart with matplotlib
... When I reproduced the plot with the edgecolor of the bars is None by default. If you want the same design as shown in the graph you can set the edgecolor parameter in both for example to k (black). The procedure is similar for the legend.
– So S
Ap...
Disposing WPF User Controls
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Because many controls reuse COM components or other unmanaged resources that were not coded with a view to being left hanging around indefinitely, or finalized on a thread pool thread, and expect/require deterministic deallocation.
– Neutr...
Mac zip compress without __MACOSX folder?
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When I had this problem I've done it from command line:
zip file.zip uncompressed
EDIT, after many downvotes: I was using this option for some time ago and I don't know where I learnt it, so I can't give you a better explanation. Chris Johnson's answer ...
How to vertically align text inside a flexbox?
...o need to change flex-direction or use text-align.
Here's your code, with one adjustment, to make it all work:
ul {
height: 100%;
}
li {
display: flex;
justify-content: center;
/* align-self: center; <---- REMOVE */
align-items: center; /* <---- NEW */
background: silver...
How can I get jQuery to perform a synchronous, rather than asynchronous, Ajax request?
I have a JavaScript widget which provides standard extension points. One of them is the beforecreate function. It should return false to prevent an item from being created.
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How to swap two variables in JavaScript
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Here's a one-liner to swap the values of two variables.
Given variables a and b:
b = [a, a = b][0];
Demonstration below:
var a=1,
b=2,
output=document.getElementById('output');
output.innerHTML="<p>Original:...