Stack Overflow is a question and answer site for professional and enthusiast programmers. It's 100% free, no registration required.

Tell me more

Here's how it works:

Anybody can ask a question
Anybody can answer
The best answers are voted up and rise to the top

Top Questions

interesting 390featured hot week month

167

votes

9

answers

5

kviews

Why can I throw null in Java?

java exception-handling nullpointerexception

19h ago techhunter 38

223

votes

1

answer

10

kviews

How does Trello access the user's clipboard?

javascript clipboard trello

14h ago tqwhite 11

97

votes

4

answers

35

kviews

Parsing IPv6 extension headers containing unknown extensions

ip ipv6

jul 9 at 3:48 Michael Hampton 1,926

56

votes

6

answers

2

kviews

How is it possible to declare nothing inside main() in C++ and yet have a working application after compilation?

c++

jul 10 at 5:50 Dr1Ku 1,022

60

votes

3

answers

2

kviews

Strange String pool behavior

java string

jul 10 at 7:43 Evgeniy Dorofeev 26.4k

17

votes

8

answers

926

views

Is it pythonic for a function to return chained values / set variables on itself?

python

1d ago Jakub M. 4,510

30

votes

10

answers

1

kviews

How do I convert an Int to a String in C# without using ToString()?

c# string int

18m ago maxihatop 75

45

votes

5

answers

2

kviews

Why does Java's BigInteger have TEN and ONE as constants? Any Practical use? [on hold]

java

jul 9 at 18:00 Doorknob 11.4k

32

votes

10

answers

903

views

Find the biggest interval that has all its members in list in O(n) [duplicate]

algorithm logic

1d ago Strilanc 5,452

34

votes

3

answers

566

views

Assigning a value to _ in Python/IPython interpreter

python function

1d ago Ashwini Chaudhary 48.8k

20

votes

7

answers

415

views

Difference between $('#tabs a') and $('#tabs').find('a')

javascript jquery pycharm

1d ago Matanya 2,825

8

votes

5

answers

791

views

Why does threading increase time (reduce performance) in this example?

c# multithreading performance

jul 10 at 0:35 NPSF3000 1,065

27

votes

5

answers

569

views

Is this a correct and portable way of checking if 2 c-strings overlap in memory?

c

2d ago Carl Norum 85.3k

17

votes

5

answers

659

views

Using auto in loops c++

c++ loops c++11 auto

jul 9 at 22:54 Meinersbur 2,686

12

votes

6

answers

426

views

Python command line: ignore indentation

python

17h ago dss539 2,452

10

votes

6

answers

387

views

How to break nested foreach then go to parent foreach on c#

c#

1d ago Err Hunter 116

13

votes

5

answers

459

views

Is there a C# pattern for strongly typed class members with external set/get methods?

c# .net c#-4.0

2d ago Simeon 3,374

13

votes

3

answers

473

views

Nameless variable declaration - why does it work?

java loops object for-loop

2h ago Grijesh Chauhan 12.5k

12

votes

3

answers

275

views

Dynamically choosing class to inherit from

python class inheritance

18h ago Kevin 681

14

votes

3

answers

447

views

What is the Difference Between `new object()` and `new {}` in C#?

c# .net

2d ago NPSF3000 1,065

14

votes

5

answers

330

views

C compare pointers

c pointers

2d ago Patrick 11.8k

18

votes

3

answers

273

views

Why does it take longer to import a function from a module than the entire module itself?

python performance python-import

15h ago Ashwini Chaudhary 48.8k

17

votes

3

answers

720

views

Why decremented of NULL not negative in this array?

php

20h ago Jack 57.8k

11

votes

5

answers

334

views

Why is factorial calculation much faster in Haskell than in Java

java haskell factorial

2d ago Daniel Fischer 100k

7

votes

3

answers

446

views

How to declare a variable in the brackets of if statement?

c++ c++11

10h ago Potatoswatter 51.6k

9

votes

6

answers

551

views

how to optimize C++/C code for a large number of integers

c++ c performance optimization

jul 9 at 19:57 harold 7,870

14

votes

3

answers

363

views

Why doesn't B::f solve the ambiguity but A::f does?

c++ argument-dependent-lookup

jul 6 at 23:59 AndreyT 111k

9

votes

6

answers

736

views

shared_ptr<> is to weak_ptr<> as unique_ptr<> is to… what?

c++ c++11 unique-ptr

1d ago ChetS 103

1

vote

2

answers

1

kviews

How to create clickable label [on hold]

c# winforms c#-4.0

jul 8 at 12:46 Romoku 4,103

19

votes

3

answers

1

kviews

What are “rvalue references for *this” for?

c++ c++11 rvalue-reference

jul 8 at 17:50 Jonathan Wakely 27.7k

4

votes

4

answers

190

views

Why is a Java ternary “evaluated” before an or?

java

jul 9 at 14:20 cwallenpoole 29.8k

16

votes

2

answers

384

views

How to instantiate or extend an abstract class without writing a new class?

java inheritance

jul 9 at 12:06 AdamJames 91

25

votes

3

answers

338

views

Iterating with while loop instead of for loop

javascript ecmascript-6

jul 7 at 23:17 Randomblue 8,807

15

votes

5

answers

410

views

Travelling by bus

algorithm

jul 9 at 6:16 Dave Galvin 360

11

votes

4

answers

250

views

Execute main method inside inner class

java

jul 10 at 9:05 Prasad Kharkar 1,884

6

votes

9

answers

250

views

Trim too long words from sentences in C#?

c#

1d ago Tim Schmelter 99.2k

12

votes

4

answers

188

views

How do called functions return to their caller, after being called?

c compiler abi function-call stackframe

jul 8 at 4:24 Undo 4,031

16

votes

6

answers

307

views

Is there a way to find the first string that matches a DateTime format string?

c# .net datetime-format datetime-parsing

jul 8 at 8:11 Alex Filipovici 7,597

10

votes

4

answers

895

views

What's the preferred C++ idiom to own a collection of polymorphic objects?

c++ c++11 polymorphism

2d ago TPJ 17

3

votes

9

answers

183

views

What does “if (1)” do?

perl

jul 8 at 18:41 David W. 29.8k

7

votes

4

answers

181

views

Does Haskell concatenate String literals at compile time?

haskell concatenation string-literals

jul 9 at 1:33 Jon Purdy 14.3k

4

votes

4

answers

223

views

value propagation in a std::vector

c++

2d ago Jan Herrmann 1,033

1

vote

10

answers

132

views

What does it mean when it says 'int' is never equal to 'null' of type 'int?' [duplicate]

c#

jul 9 at 14:21 Jon G 219

19

votes

2

answers

340

views

What does “\1” represent in this Java string?

java regex unicode-escapes

12h ago Charles 28.8k

17

votes

5

answers

321

views

Function Returning Itself

c function

jul 9 at 5:41 John Bode 24.2k

33

votes

1

answer

520

views

Should custom containers have free begin/end functions?

c++ c++11 argument-dependent-lookup

2d ago TemplateRex 10.3k

2

votes

9

answers

389

views

Is this for loop considered good c++? [on hold]

c++ c++11

jul 7 at 22:03 Yakk 12.8k

11

votes

2

answers

221

views

Java not deterministic?

java

2h ago Smi 3,579

9

votes

6

answers

171

views

How can serialisation/deserailisation break immutabilty ?

java

1d ago Dziurdziak Mateusz 38

9

votes

8

answers

203

views

Determining the type of objects in a collection or array

java arrays collections

1d ago Raedwald 5,863

6

votes

6

answers

115

views

How to handle both `with open(…)` and `sys.stdout` nicely?

python

1d ago 2rs2ts 1,220

3

votes

4

answers

189

views

What type of value should it be returned by getters that return size of vector?

c++

jul 6 at 21:39 AndreyT 111k

4

votes

3

answers

125

views

How to find the max value of unknown integer type

c++

jul 8 at 9:31 soerium 1

2

votes

7

answers

146

views

Difference between = and new

java

jul 6 at 13:36 Baadshah 16.3k

0

votes

8

answers

112

views

Difference between object and reference in java with code?

java

1d ago CHHIBI 133

0

votes

3

answers

142

views

Is it OK to store the result from vector.size() into variable of type int?

c++

jul 6 at 16:29 Jerry Coffin 191k

2

votes

4

answers

142

views

Why is this array having all remaining values initialized to zero?

c arrays array-initialization

jul 8 at 13:50 Stefano Falasca 637

4

votes

3

answers

177

views

how could we know this is the last element in the array?

c arrays

1d ago Maroun Maroun 9,735

0

votes

7

answers

103

views

Converting list to string? [duplicate]

python

2d ago drewk 14.5k

9

votes

4

answers

259

views

Are there any rules of thumb when `virtual` is a considerable overhead?

c++ performance

jul 8 at 19:04 Sean Middleditch 396

3

votes

5

answers

115

views

A list comprehension returns wrong result

python

2d ago JS. 1,296

4

votes

6

answers

234

views

Is it OK to return const reference to a variable created inside a function? [duplicate]

c++

jul 8 at 11:05 user1095108 1,258

8

votes

4

answers

186

views

When is an array name or a function name 'converted' into a pointer ? (in C)

c arrays function pointers function-pointers

jul 7 at 19:42 newacct 31.2k

4

votes

8

answers

182

views

Is this a bug in Visual Studio 2010 compiler?

c# .net visual-studio-2010

jul 9 at 13:33 Jason 102k

2

votes

3

answers

230

views

Which one of theese XOR are considered better in Haskell

haskell optimization

jul 9 at 10:55 leftaroundabout 7,749

15

votes

4

answers

221

views

Prevent compiler/cpu instruction reordering c#

c#

jul 8 at 13:12 Julien Lebosquain 16.7k

0

votes

4

answers

104

views

What is wrong with this switch statement? [on hold]

java switch-statement

jul 10 at 5:33 Ashish Aggarwal 1,033

12

votes

3

answers

132

views

Weird behaviour when using Java ternary operator

java nullpointerexception ternary-operator

jul 9 at 18:30 Eric Jablow 2,748

6

votes

2

answers

120

views

Is there a way to know how many parameters are needed for a method?

ruby

1d ago toro2k 4,432

10

votes

3

answers

118

views

How are Clojure macros different from C macros?

clojure

jul 9 at 5:01 Amogh Talpallikar 2,810

6

votes

3

answers

112

views

jQuery: selecting elements with exotic id [duplicate]

jquery

jul 9 at 15:38 Baadshah 16.3k

5

votes

5

answers

159

views

How to prevent overflow when using usual math functions exp() log()?

c++ c undefined-behavior

1d ago David RF 2,753

6

votes

6

answers

152

views

Composing function composition: How does (.).(.) work?

haskell currying

1d ago Will Ness 12.2k

0

votes

8

answers

151

views

Beginner c# trouble

c#

jul 9 at 14:18 Brian Rogers 2,695

4

votes

5

answers

148

views

Why is the python destructor being called?

python

1d ago ppone 45

10

votes

1

answer

187

views

Sealing abstract class or interface in .NET class

c# .net

jul 10 at 7:11 Rivers 122

2

votes

8

answers

142

views

Why make an object immutable [on hold]

java immutability

1d ago Pablo Lozano 514

2

votes

4

answers

86

views

Getting the address location of variable

c#

1d ago Dmitry Bychenko 1,516

7

votes

7

answers

181

views

How to bind a string to object in java

java data-binding

jul 9 at 12:09 Steve P. 2,482

2

votes

6

answers

135

views

Can I use `operator delete[]` for a single element array allocation?

c++

1d ago SuvP 1,878

3

votes

8

answers

105

views

Better way to achieve dynamic array

java arrays

2d ago ArtB 2,763

1

vote

6

answers

96

views

copying a list to a new list - More efficient & Best Practice

c#

2d ago utter_step 77

7

votes

3

answers

150

views

Python list([]) and []

python arrays list

1d ago Ashwini Chaudhary 48.8k

9

votes

6

answers

226

views

Number of Distinct Subarrays

arrays algorithm

jul 8 at 8:16 njzk2 8,820

12

votes

2

answers

221

views

Assigning the variable name to the same variable name

javascript variables

jul 8 at 7:33 rab 1,295

5

votes

3

answers

63

views

Get type of data stored in a string in python

python

12h ago murftown 304

10

votes

1

answer

133

views

Java generics type erasure

java generics erasure

1d ago Oli Charlesworth 127k

13

votes

3

answers

103

views

+100

completely deleting a file from server

php

14h ago bizzehdee 2,048

6

votes

3

answers

132

views

Sample java code to simulate out of memory situation [on hold]

java

21h ago Dariusz 4,250

5

votes

4

answers

60

views

Order of output

ruby

2d ago Borodin 31.5k

10

votes

2

answers

127

views

Why does outerHTML bring back  comments?

javascript jquery

7h ago Zhanger 762

4

votes

5

answers

154

views

How should I order an if statement? [duplicate]

java c++ c

1d ago Novo 1

4

votes

5

answers

118

views

Undo sort on sorted array in javascript

javascript arrays algorithm sorting

1d ago NagaJolokia 861

5

votes

3

answers

116

views

Better way to generate array of all letters in the alphabet

java

2d ago Ruchira 1,577

2

votes

8

answers

90

views

Jquery code, how would i do this?

jquery

jul 9 at 11:46 Jeet Bhatt 21

2

votes

4

answers

89

views

binary_search in c++ unexpected behaviour

c++ stl

1d ago milleniumbug 2,090

Looking for more? Browse the complete list of questions, or popular tags. Help us answer unanswered questions.

weekly questions feed

Technology			Life / Arts	Culture / Recreation	Science	Other
Stack Overflow Server Fault Super User Web Applications Ask Ubuntu Webmasters Game Development TeX - LaTeX	Programmers Unix & Linux Ask Different (Apple) WordPress Answers Geographic Information Systems Electrical Engineering Android Enthusiasts IT Security	Database Administrators Drupal Answers SharePoint User Experience Mathematica more (13)	Photography Science Fiction & Fantasy Seasoned Advice (cooking) Home Improvement more (13)	English Language & Usage Skeptics Mi Yodeya (Judaism) Travel Christianity Arqade (gaming) Bicycles Role-playing Games more (21)	Mathematics Cross Validated (stats) Theoretical Computer Science Physics MathOverflow more (7)	Stack Apps Meta Stack Overflow Area 51 Stack Overflow Careers

site design / logo © 2013 stack exchange inc; user contributions licensed under cc-wiki with attribution required

rev 2013.7.12.847

Stack Overflow works best with JavaScript enabled