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How to get the index of an item in a list in a single step?
...search; therefore, this method is an
O(n) operation, where n is Count.
If the item is not found, it will return -1
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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
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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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What is the difference between localStorage, sessionStorage, session and cookies?
...tual to the situation.
In all cases, these storage mechanisms will be specific to an individual browser on an individual computer/device. Any requirement to store data on an ongoing basis across sessions will need to involve your application server side - most likely using a database, but possibly ...
Bash tool to get nth line from a file
...en using head -n | tail -1 which does the trick, but I've been wondering if there's a Bash tool that specifically extracts a line (or a range of lines) from a file.
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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...
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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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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When to use CouchDB over MongoDB and vice versa
... scenarios for each NoSQL database compared. Quoting the link,
MongoDB: If you need dynamic queries. If you prefer to define indexes, not map/reduce functions. If you need good performance on a big DB. If you wanted CouchDB, but your data changes too much, filling up disks.
CouchDB : For accumula...
How to call one shell script from another shell script?
...
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...