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What is a NullPointerException, and how do I fix it?
What are Null Pointer Exceptions ( java.lang.NullPointerException ) and what causes them?
12 Answers
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Didn't Java once have a Pair class? [duplicate]
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Map.Entry
Java 1.6 and upper have two implementation of Map.Entry interface pairing a key with a value:
AbstractMap.SimpleEntry
AbstractMap.SimpleImmutableEntry
For example
Map.Entry < Month, Boolean > pair =
new AbstractMap.SimpleImmutableEntry <>(
Month....
Visual Studio Wcf Test Client - entering an Int array
...flow.com%2fquestions%2f2743166%2fvisual-studio-wcf-test-client-entering-an-int-array%23new-answer', 'question_page');
}
);
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Get file name from URL
....example.com/some/path/to/a/file.xml?foo=bar#test");
System.out.println(FilenameUtils.getBaseName(url.getPath())); // -> file
System.out.println(FilenameUtils.getExtension(url.getPath())); // -> xml
System.out.println(FilenameUtils.getName(url.getPath())); // -> fil...
Reduce, fold or scan (Left/Right)?
...sult using a start value.
scanLeft and scanRight cumulate a collection of intermediate cumulative results using a start value.
Accumulate
From LEFT and forwards...
With a collection of elements abc and a binary operator add we can explore what the different fold functions do when going forwards ...
SSMS插件开发指南 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ion Data\Microsoft\MSEnvShared\AddIns”中。
Putting SSMSAddin.addin into %PROGRAMDATA%\Application Data\Microsoft\MSEnvShared\Addins\
(C:\ProgramData\Application Data\Microsoft\MSEnvShared\Addins\)
Will install add-in for all users on the machine.
Putting SSMSAddin.addin into %APPDA...
.gitignore for Visual Studio Projects and Solutions
...RIA/Silverlight projects
Generated_Code/
# Backup & report files from converting an old project file
# to a newer Visual Studio version. Backup files are not needed,
# because we have git ;-)
_UpgradeReport_Files/
Backup*/
UpgradeLog*.XML
UpgradeLog*.htm
# SQL Server files
*.mdf
*.ldf
# Busin...
MD5 algorithm in Objective-C
...ded as an addition for ie NSString and NSData like below.
MyAdditions.h
@interface NSString (MyAdditions)
- (NSString *)md5;
@end
@interface NSData (MyAdditions)
- (NSString*)md5;
@end
MyAdditions.m
#import "MyAdditions.h"
#import <CommonCrypto/CommonDigest.h> // Need to import for CC_MD...
How to round an image with Glide library?
...
Glide.with(context)
.load(url)
.circleCrop()
.into(imageView);
Glide V3:
You can use RoundedBitmapDrawable for circular images with Glide. No custom ImageView is required.
Glide.with(context).load(url).asBitmap().centerCrop().into(new BitmapImageViewTarget(imageView...
Easy idiomatic way to define Ordering for a simple case class
I have a list of simple scala case class instances and I want to print them in predictable, lexicographical order using list.sorted , but receive "No implicit Ordering defined for ...".
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