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Should I instantiate instance variables on declaration or in the constructor?
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There is no difference - the instance variable initialization is actually put in the constructor(s) by the compiler.
The first variant is more readable.
You can't have exception handling with the first variant.
There is additionally the initialization block, which is as well put in the constru...
How to solve “Plugin execution not covered by lifecycle configuration” for Spring Data Maven Builds
..., in order to avoid the exceptions in Eclipse, one needs to simply enclose all the plugin tags inside a <pluginManagement> tag, like so:
<build>
<pluginManagement>
<plugins>
<plugin> ... </plugin>
<plugin> ... </plugin...
Simple Pivot Table to Count Unique Values
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UPDATE: You can do this now automatically with Excel 2013. I've created this as a new answer because my previous answer actually solves a slightly different problem.
If you have that version, then select your data to create a pivot table, and when you create yo...
Fastest way to check a string contain another substring in JavaScript?
...shows some interesting results. Short version: indexOf() is the fastest of all methods, but this may vary based on string length and any repeating patterns.
– Byson
Dec 22 '14 at 15:04
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What is the difference between ~> and >= when specifying rubygem in Gemfile?
... and use that until it reaches a maximum version. So ~>0.8.5 is semantically equivalent to:
gem "cucumber", ">=0.8.5", "<0.9.0"
The easy way to think about it is that you're okay with the last digit incrementing to some arbitrary value, but the ones preceding it in the string cannot be gr...
Including non-Python files with setup.py
... do I make setup.py include a file that isn't part of the code? (Specifically, it's a license file, but it could be any other thing.)
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Prevent scroll-bar from adding-up to the Width of page on Chrome
I have a small issue trying to keep my .html pages at a consistent width on Chrome,
For example I have a page (1) with lots of contents that overflows the viewport's (right word?) height, so there's a vertical scroll-bar on that page (1). On page (2) i have the same layout (menus, divs,...etc) but l...
How exactly does tail recursion work?
...nt one but without explicit recursion (that is, without explicit function calls). If you change the logic into something non-equivalent, you may indeed make the function loop forever in some or all cases.
– Alexey Frunze
Mar 20 '13 at 9:30
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Does JavaScript have “Short-circuit” evaluation?
... in times of JIT-compiling-magic in javascript implementations, one does really want to know if something is "the standard" , or potentially subject to the implementation. The way a condition statement with Binary Logical Operators is evaluated and (short-curcuit) is a standard behavior ecma-interna...
Required tags not present when using Delphi XML Data Binding Wizard
...e="MyReportType" />
<xs:complexType name="MyReportType">
<xs:all>
<xs:element name="Header" type="HeaderType" use="optional" />
<xs:element name="Values" type="ValuesType" use="optional" />
<xs:element name="Events" type="EventsType" use="optional" />
...