Questions tagged [null]

10

votes

2

answers

SQL Server: Why does comparison null=value return true for NOT IN?

sql-server null celko

asked 2010-10-13T14:22:09.530

48

votes

4

answers

This if statement should not detect 0; only null or empty strings

javascript null if-statement

asked 2010-10-08T04:59:24.417

210

votes

14

answers

Checking for NULL pointer in C/C++

c++ c if-statement null coding-style

asked 2010-09-29T20:40:26.503

18

votes

2

answers

Powershell 2.0 generates nulls between characters

null powershell-2.0

asked 2010-09-27T17:32:54.387

143

votes

6

answers

How much size "Null" value takes in SQL Server

sql-server t-sql sql-server-2005 null

asked 2010-09-16T22:01:04.653

9

votes

5

answers

Java ConcurrentHashMap not thread safe.. wth?

java null try-catch nullpointerexception concurrenthashmap

asked 2010-09-16T00:57:54.617

24

votes

2

answers

Differences between "IS NULL" and "ISNULL()" in Mysql

mysql performance null

asked 2010-08-20T10:44:26.227

1514

votes

11

answers

Null object in Python

python object null

asked 2010-07-20T11:53:41.243

14

votes

8

answers

Selecting null value from XML in SQL Server

sql-server xml null xml-nil

asked 2010-07-08T21:37:09.117

9

votes

4

answers

php json_encode returning null

php null json

asked 2010-07-05T15:34:51.570

14

votes

7

answers

Options for eliminating NULLable columns from a DB model (in order to avoid SQL's three-valued logic)?

sql null relational-database three-valued-logic

asked 2010-06-20T16:01:22.213

58

votes

7

answers

Is it possible to set an object to null?

c++ object null is-empty stdoptional

asked 2010-06-13T02:12:28.740

84

votes

10

answers

Java constructor style: check parameters aren't null

java constructor null coding-style

asked 2010-06-08T13:39:55.170

12

votes

6

answers

Is there a way to know in VB.NET if a handler has been registered for an event?

c# .net vb.net events null

asked 2010-06-01T19:15:07.620

108

votes

20

answers

How to check a string against null in java?

java string null

asked 2010-05-27T11:11:23.943

104

votes

10

answers

SQL Server String Concatenation with Null

sql-server null string-concatenation calculated-columns

asked 2010-05-26T21:05:03.220

12

votes

2

answers

SQL Select between two fields depending on the value of one field

sql postgresql null

asked 2010-05-26T11:20:53.973

13

votes

9

answers

It is good programming practice to always check for null pointers before using an object in C++?

c++ null

asked 2010-05-09T19:53:24.013

18

votes

4

answers

Cannot pass null to server using jQuery AJAX. Value received at the server is the string "null"

jquery ajax null

asked 2010-05-08T13:10:49.130

14

votes

6

answers

How can I write a null ASCII character (nul) to a file with a Windows batch script?

windows null batch-file ascii

asked 2010-04-28T15:12:53.183

16

votes

2

answers

How can I declare and initialize an array of pointers to a structure in C?

c null pointers malloc structure

asked 2010-04-15T01:14:55.033

21

votes

6

answers

Why does null need an explicit type cast here?

c# .net casting null

asked 2010-04-09T15:54:03.603

71

votes

8

answers

How can a not null constraint be dropped?

mysql null constraints

asked 2010-04-09T13:25:00.837

196

votes

28

answers

How to check if my string is equal to null?

java string null equals conditional-operator

asked 2010-04-08T17:15:11.227

30

votes

6

answers

Can a conforming C implementation #define NULL to be something wacky

c null standards

asked 2010-04-08T10:52:23.837

37

votes

3

answers

Can PCRE regex match a null character?

regex null pcre

asked 2010-04-05T20:39:20.870

682

votes

30

answers

How can I check for an undefined or null variable in JavaScript?

javascript null undefined

asked 2010-04-01T09:17:18.953

55

votes

5

answers

Why static fields are not initialized in time?

java static null nullpointerexception

asked 2010-03-30T18:39:07.613

81

votes

7

answers

How to SELECT rows WHERE column value IS NOT NULL using CodeIgniter's query builder

php mysql codeigniter null query-builder

asked 2010-03-22T00:56:55.227

22

votes

5

answers

Why doesn't the compiler at least warn on this == null

c# null this

asked 2010-03-17T16:41:12.757

9

votes

1

answers

Java - JSON Null Exception

java json exception null

asked 2010-03-16T16:18:05.853

109

votes

8

answers

Checking for an empty field with MySQL

php sql mysql null

asked 2010-02-24T15:13:52.717

9

votes

8

answers

How to define NULL using #define

c++ c null

asked 2010-02-24T11:40:52.163

54

votes

6

answers

PHP constructor to return a NULL

php constructor error-handling null

asked 2010-02-06T21:03:46.907

15

votes

5

answers

How to zero out new memory after realloc

c null memory-management

asked 2010-01-26T17:33:52.000

83

votes

18

answers

What is the point of the class Option[T]?

java scala null functional-programming monads

asked 2010-01-16T22:39:25.940

14

votes

9

answers

What is null in c#, java?

c# java null

asked 2010-01-08T14:51:07.473

75

votes

7

answers

obj.nil? vs. obj == nil

ruby null comparison koan

asked 2009-12-29T00:14:20.940

120

votes

10

answers

json_encode is returning NULL?

php null json

asked 2009-12-28T23:05:46.447

10

votes

7

answers

#define NULL NULL

c++ c null macros

asked 2009-12-22T22:38:39.067

158

votes

11

answers

Does free(ptr) where ptr is NULL corrupt memory?

c pointers memory-management null free

asked 2009-12-21T07:43:58.537

21

votes

6

answers

Update Field When Not Null

mysql sql null sql-update

asked 2009-12-07T14:13:20.703

24

votes

7

answers

why is null not equal to null false

sql database null nullable

asked 2009-12-02T16:12:08.987

12

votes

3

answers

Why does bcp output null when the column contains an empty string and empty string when the column is null?

sql sql-server null bcp

asked 2009-10-29T15:56:55.293

17

votes

11

answers

null objects vs. empty objects

c# c++ null

asked 2009-10-27T02:20:10.283

11

votes

2

answers

Objective-C uninitialized pointers vs null pointers

objective-c pointers null

asked 2009-10-24T21:14:51.970

11

votes

4

answers

how to fix a document.body is null-error

javascript jquery null width

asked 2009-10-21T21:36:10.980

53

votes

5

answers

PHP Check for NULL

php mysql null

asked 2009-10-16T05:33:13.613

11

votes

6

answers

how to set a null value to a field in a table using oracle sql developer tool?

oracle-database null insert oracle-sqldeveloper

asked 2009-09-11T07:57:03.827

398

votes

11

answers

What is the difference between NULL, '\0' and 0?

c pointers null

asked 2009-08-18T22:09:59.147

Questions tagged null