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Float vs Decimal in ActiveRecord
...r that is how the IEEE specification defines floats in binary format. Basically, it stores sign, fraction and exponent to represent a Float. It's like a scientific notation for binary (something like +1.43*10^2). Because of that, it is impossible to store fractions and decimals in Float exactly.
Th...
regex.test V.S. string.match to know if a string matches a regular expression
...sion
Use .test if you want a faster boolean check. Use .match to retrieve all matches when using the g global flag.
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How to list the contents of a package using YUM?
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There is a package called yum-utils that builds on YUM and contains a tool called repoquery that can do this.
$ repoquery --help | grep -E "list\ files"
-l, --list list files in this package/group
Combined into one example:
$ r...
How do I browse an old revision of a Subversion repository through the web view?
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Be careful with that: this is not officially supported and can change anytime with a new release. Even though it has been the same since the very beginnings of svn...
– Stefan
Mar 16 '09 at 18:01
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Name node is in safe mode. Not able to leave
...e leave
hadoop dfsadmin has been deprecated and so is hadoop fs command, all hdfs related tasks are being moved to a separate command hdfs.
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PHP: merge two arrays while keeping keys instead of reindexing?
...operator is not an addition, it's a union. If the keys don't overlap then all is good, but if they do...
– GordonM
May 3 '12 at 15:46
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Why Large Object Heap and why do we care?
...used holes), it makes the CPU cache much more efficient. The cache is a really big deal on modern processors, they are an easy order of magnitude faster than the memory bus.
Compacting is done simply by copying bytes. That however takes time. The larger the object, the more likely that the cost ...
Using WebAPI or MVC to return JSON in ASP.NET
...l web-services hosted by your company/organization.)
MVC Controllers typically rely on the MVC Framework, if you look at default templates and most of the work done by the community and your peers you will notice that almost all MVC Controllers are implemented with the View in mind.
Personally, I ...
How do you plot bar charts in gnuplot?
...plications it's more convenient to use the histogram plotting style, especially for grouping and stacking values.
– Christoph
Feb 1 '15 at 14:18
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Drawing Isometric game worlds
...loop with fairly straight forward logic that works consistently throughout all tiles.
Disadvantage:
One downside to that approach is that the x and y coordinates of the tiles on the map will increase in diagonal lines, which might make it more difficult to visually map the location on the screen t...