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“unmappable character for encoding” warning in Java
... characters... they are parsed before doing lexical analysis. For example, if you put this comment /* c:\unit */ to your code, it will not compile anymore, because "nit" isn't correct hex number.
– Peter Štibraný
Jan 21 '09 at 11:25
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Is it good practice to use java.lang.String.intern()?
...you're relying on the strings being internalized.
The second disadvantage if you decide to internalize strings is that the intern() method is relatively expensive. It has to manage the pool of unique strings so it does a fair bit of work (even if the string has already been internalized). So, be ca...
Uniq by object attribute in Ruby
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The hash method is better if you want to group by say album_id while (say) summing up num_plays.
– thekingoftruth
Sep 13 '13 at 22:59
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Generate colors between red and green for a power meter?
... N steps, each step you increment X by (Y-X)/N - though it will look nicer if you move in the HSV space rather than RGB
– Paul Dixon
Sep 19 '14 at 15:44
add a comment
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How can a Java program get its own process ID?
...and a Java virtual
machine implementation can choose to embed platform-specific useful
information in the returned name string. Each running virtual machine
could have a different name.
In Java 9 the new process API can be used:
long pid = ProcessHandle.current().pid();
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Following git-flow how should you handle a hotfix of an earlier release?
If you try to follow the git-flow branching model, documented here and with tools here , how should you handle this situation:
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How to call one shell script from another shell script?
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There are a couple of different ways you can do this:
Make the other script executable, add the #!/bin/bash line at the top, and the path where the file is to the $PATH environment variable. Then you can call it as a normal command;
Or call it wi...
How can I reorder my divs using only CSS?
Given a template where the HTML cannot be modified because of other requirements, how is it possible to display (rearrange) a div above another div when they are not in that order in the HTML? Both div s contain data that varies in height and width.
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Increasing nesting function calls limit
There is one very bad limit in PHP: if you call some function a1() that calls a2(), that calls a3... so when a99() will call a100() you will see
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What are the differences between Helper and Utility classes?
... it can be stateful or require an instance be created. I would avoid this if possible.
If you can make the name more specific. e.g. if it has sorting methods, make it XSorter
For arrays you can find helper classes like
Array
Arrays
ArrayUtil
ArrayUtils
ArrayHelper
BTW a short hand for a utilit...