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What are the use cases for selecting CHAR over VARCHAR in SQL?
I realize that CHAR is recommended if all my values are fixed-width. But, so what? Why not just pick VARCHAR for all text fields just to be safe.
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Why do == comparisons with Integer.valueOf(String) give different results for 127 and 128?
I have no idea why these lines of code return different values:
5 Answers
5
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Peak detection in a 2D array
...ping a veterinary clinic measuring pressure under a dogs paw. I use Python for my data analysis and now I'm stuck trying to divide the paws into (anatomical) subregions.
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How does lucene index documents?
... about Lucene; also I read the document in this link
( http://lucene.sourceforge.net/talks/pisa ).
4 Answers
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git cherry-pick says “…38c74d is a merge but no -m option was given”
... my master branch and want to bring those upstream. when I cherry-pick the following commits however I get stuck on fd9f578 where git says:
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Why does Ruby have both private and protected methods?
Before I read this article , I thought access control in Ruby worked like this:
7 Answers
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Why are const parameters not allowed in C#?
It looks strange especially for C++ developers. In C++ we used to mark a parameter as const in order to be sure that its state will not be changed in the method. There are also other C++ specific reasons, like passing const ref in order to pass by ref and be sure that state will not be changed. ...
How do I style a dropdown with only CSS?
...ne - with Internet Explorer 10 - 11 workaround (Demo)
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To hide the default arrow set appearance: none on the select element, then add your own custom arrow with background-image
select {
-webkit-appearance: none;
-moz-appearance: none;
appearance: none; /* Remove default arrow *...
App Launcher 应用启动器扩展：用于启动其他应用程序的强大工具，支持独立...
...米设备的问题（见说明）添加属性：CanDrawOverlays、CanLaunchFromBackground、CurrentLanguage、IsXiaomi、Manufacturer、PermissionDelay、VersionName、VersionSDK添加方法：CheckBackgroundLaunchPermission、LaunchAppFromIntent、LaunchForResultFromIntent、OpenMiuiPermissionEdito...
Combining C++ and C - how does #ifdef __cplusplus work?
I'm working on a project that has a lot of legacy C code. We've started writing in C++, with the intent to eventually convert the legacy code, as well. I'm a little confused about how the C and C++ interact. I understand that by wrapping the C code with extern "C" the C++ compiler will no...