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| groovy | |
| http://www.twitpic.com/agmo4/full |
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| public class Test{ | |
| public static void main(String[] args){ | |
| //System.out.println(null); | |
| //System.out.println(null > 10); | |
| //System.out.println(null < 10); | |
| System.out.println(null == null); | |
| System.out.println(10 == 10); | |
| } | |
| } | |
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| Perl> undef == 10; | |
| Use of uninitialized value in numeric eq (==) at (eval 2) line 3. | |
| Perl> undef > 10; | |
| Use of uninitialized value in numeric gt (>) at (eval 3) line 3. | |
| Perl> undef < 10; | |
| Warning: Use of "undef" without parentheses is ambiguous at (eval 4) line 3. |
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| scala> 10 == 10 | |
| res6: Boolean = true | |
| scala> null > 10 | |
| <console>:5: error: value > is not a member of Null | |
| null > 10 | |
| ^ | |
| scala> null < 10 | |
| <console>:5: error: value < is not a member of Null |
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| mysql> select null; | |
| +------+ | |
| | NULL | | |
| +------+ | |
| | NULL | | |
| +------+ | |
| 1 row in set (0.00 sec) | |
| mysql> select null>10, null<10, null=null, 10=10 as data; | |
| +---------+---------+-----------+------+ |
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| SQLite version 3.6.10 | |
| Enter ".help" for instructions | |
| Enter SQL statements terminated with a ";" | |
| sqlite> select null; | |
| sqlite> select null>10, null<10, null=null, 10=10 as data; | |
| |||1 | |
| sqlite> |
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| Welcome to psql 8.3.7, the PostgreSQL interactive terminal. | |
| Type: \copyright for distribution terms | |
| \h for help with SQL commands | |
| \? for help with psql commands | |
| \g or terminate with semicolon to execute query | |
| \q to quit | |
| test_psql=> select null as data; | |
| data |
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| Jython 2.2.1 on java1.6.0_0 | |
| Type "copyright", "credits" or "license" for more information. | |
| >>> None | |
| >>> None > 10 | |
| 0 | |
| >>> None < 10 | |
| 1 | |
| >>> None == None | |
| 1 | |
| >>> |
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| //#Javascript | |
| >>> null | |
| null | |
| >>> null == 10 | |
| false | |
| >>> null > 10 | |
| false | |
| >>> null < 10 | |
| true | |
| >>> null == null |
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| Lua 5.1.4 Copyright (C) 1994-2008 Lua.org, PUC-Rio | |
| > print(nil) | |
| nil | |
| > print(nil > 10) | |
| stdin:1: attempt to compare number with nil | |
| stack traceback: | |
| stdin:1: in main chunk | |
| [C]: ? | |
| > print(nil < 10) | |
| stdin:1: attempt to compare nil with number |