Web Development QnA

apache mod rewrite 에서 url encoding

fratboy — Mon, 29 Jun 2009 00:05:02 +0000

RewriteMap escape int:escape

RewriteRule ^/([^/]+)$ /?q=${escape:$1} [C]

특정 문자 수 세기

fratboy — Sat, 30 May 2009 08:34:49 +0000

,를 예로 들면

SELECT
CHAR_LENGTH(field_name) - CHAR_LENGTH(REPLACE(field_name, ' ', '')) as
num_spaces FROM my_table;

maven dependency version

fratboy — Sat, 30 May 2009 08:31:47 +0000

Dependency Scope

Dependency scope is used to limit the transitivity of a depedency, and also to affect the classpath used for various build tasks.

There are 6 scopes available:

compile
This is the default scope, used if none is specified. Compile dependencies are available in all classpaths of a project. Furthermore, those dependencies are propagated to dependent projects.
provided
This is much like compile, but indicates you expect the JDK or a container to provide the dependency at runtime. For example, when building a web application for the Java Enterprise Edition, you would set the dependency on the Servlet API and related Java EE APIs to scope provided because the web container provides those classes. This scope is only available on the compilation and test classpath, and is not transitive.
runtime
This scope indicates that the dependency is not required for compilation, but is for execution. It is in the runtime and test classpaths, but not the compile classpath.
test
This scope indicates that the dependency is not required for normal use of the application, and is only available for the test compilation and execution phases.
system
This scope is similar to provided except that you have to provide the JAR which contains it explicitly. The artifact is always available and is not looked up in a repository.
import (only available in Maven 2.0.9 or later)
This scope is only used on a dependency of type pom in the section. It indicates that the specified POM should be replaced with the dependencies in that POM’s section. Since they are replaced, dependencies with a scope of import do not actually participate in limiting the transitivity of a dependency.

Dependency Version Ranges

Need to be able to declare minimum, maximum allowed versions of a dependency (both min and max may be optional), and allow “holes” for known incompatible versions.

Proposed syntax:

Range	Meaning
`(,1.0]`	x <= 1.0
`1.0`	“Soft” requirement on 1.0 (just a recommendation – helps select the correct version if it matches all ranges)
`[1.0]`	Hard requirement on 1.0
`[1.2,1.3]`	1.2 <= x <= 1.3
`[1.0,2.0)`	1.0 <= x < 2.0
`[1.5,)`	x >= 1.5
`(,1.0],[1.2,)`	x <= 1.0 or x >= 1.2. Multiple sets are comma-separated
`(,1.1),(1.1,)`	This excludes 1.1 if it is known not to work in combination with this library

List to Array

fratboy — Sat, 02 May 2009 19:05:09 +0000

    // Create an array containing the elements in a list
    Object[] objectArray = list.toArray();
    MyClass[] array = (MyClass[])list.toArray(new MyClass[list.size()]);

    // Create an array containing the elements in a set
    objectArray = set.toArray();
    array = (MyClass[])set.toArray(new MyClass[set.size()]);

    // Create an array containing the keys in a map
    objectArray = map.keySet().toArray();
    array = (MyClass[])map.keySet().toArray(new MyClass[set.size()]);

    // Create an array containing the values in a map
    objectArray = map.values().toArray();
    array = (MyClass[])map.values().toArray(new MyClass[set.size()]);

mysql stored procedure 에서 limit 값에 변수를 쓰려면면

fratboy — Wed, 22 Apr 2009 06:26:15 +0000

http://bugs.mysql.com/bug.php?id=11918

firefox 소스보기 에디터 변경

fratboy — Sun, 12 Apr 2009 04:15:26 +0000

주소입력창에 about:config 를 입력하고 엔터(파폭 환경 설정 페이지로 이동)
Filter 입력부분에 view_source 으로 검색
view_source.editor.external 값을 true(더블클릭을 하면 자동으로 true/false로 전환) 4. view_source.editor.path 값을 원하는 프로그램 경로(C:\Program Files\EditPlus 2\editplus.exe)를 입력한다.(더블클릭시 입력창이 뜬다)

mysql table 부분 복구

fratboy — Thu, 09 Apr 2009 07:30:53 +0000

awk ‘/Table structure for table .data_library./,/Table structure for table .data_movie_credit./{print}’ xxx_2009.sql > xxx_data_library.sql

inner join, outer join

fratboy — Tue, 07 Apr 2009 00:27:27 +0000

SELECT *
FROM mission ms
INNER JOIN category AS c ON ms.category_id = c.category_id
LEFT OUTER JOIN content cn ON ms.mission_id = cn.mission_id;

List 초기화

fratboy — Fri, 13 Mar 2009 06:25:54 +0000

List str = new ArrayList() { { add(“1″); add(“2″); } };

List str = Arrays.asList(new String[]{“1″, “2″});
List str = Arrays.asList(“1″, “2″); //jdk 5 이상

mysql 에 rownum 사용하기

fratboy — Tue, 24 Feb 2009 04:03:47 +0000

SELECT @rownum:=@rownum+1 AS rownum, t.* FROM (SELECT @rownum:=0) r, test t;

쿼리 한번으로 oracle 의 rownum 을 흉내낼 수 있다.