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What is float in Java?
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MongoDB aggregation framework match OR
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@PaulShapiro: I hope you did not down voted because of this. For all please consider commenting the reason before down-voting it helps everyone. Here is the reference Boolean Aggregation Operators -> $or
– Amol M Kulkarni
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Remove data.frame row names when using xtable
OK, I admit this one is a bit uptight (read: "stupid"), and I assume it's quite easy too. I'm writing a report and I want to use xtable package for LaTeX table generation (note that memisc package does the job, but say I want to do this solely with xtable ).
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Calculate a percent with SCSS/SASS
I want to set a width in percentage in scss via calculation, but it gives me errors..
3 Answers
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What happens to a declared, uninitialized variable in C? Does it have a value?
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@Stuart: there's a thing called "trap representation", which is basically a bit pattern that does not denote a valid value, and may cause e.g. hardware exceptions at runtime. The only C type for which there's a guarantee that any bit pattern is a val...
What are the differences between a clustered and a non-clustered index?
...clustered indexes should be set on a field that is normally incremental ie Id or Timestamp.
SQL Server will normally only use an index if its selectivity is above 95%.
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Check whether HTML element has scrollbars
...e a couple of weeks ago. It worked for me.
var div = document.getElementById('container_div_id');
var hasHorizontalScrollbar = div.scrollWidth > div.clientWidth;
var hasVerticalScrollbar = div.scrollHeight > div.clientHeight;
/* you'll get true/false */
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How to increase the maximum number of opened editors in IntelliJ?
...if you are using the Recent Files (Cmd+E) feature.
Works for all IntelliJ IDEA platform based IDEs.
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How to revert Master branch to upstream
...it remote update
# the double hyphen ensures that upstream/master is
# considered as a revision and not confused as a path
git reset --hard upstream/master --
Then push this new branch-head to your origin repository, ignoring the fact that it won't be a fast-forward:
git push origin +master
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Stretch and scale CSS background
...work with lower verions of Internet Explorer, try these CSS:
filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src='.myBackground.jpg', sizingMethod='scale');
-ms-filter: "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='myBackground.jpg', sizingMethod='scale')";
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