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07_String_Processing.md
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@@ -48,7 +48,7 @@ and built-in [string functions](https://help.sap.com/doc/abapdocu_cp_index_htm/C
corresponding ABAP statements, or even more. The return value of string functions
that return character strings is always of type `string`.
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## Data Types for Character Strings
@@ -88,7 +88,7 @@ that must be a maximum of two characters, or for input fields in
forms that should not exceed a certain length. If limiting a string
is not relevant, text strings are a good choice.
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## Declaring Character-Like Data Objects
@@ -145,7 +145,7 @@ DATA char(4) TYPE c.
DATA char_len_one TYPE c.
```
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## Assigning Values
@@ -229,7 +229,7 @@ however, with [significant
differences](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abenliteral_operator.htm)
to `&&`.
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## String Templates
- Using string templates, you can construct strings very elegantly from
@@ -311,7 +311,7 @@ s1 = |{ CONV decfloat34( - 1 / 3 ) DECIMALS = 3 }|. "'-0.333'
> **💡 Note**<br>
> Escape `\|{}` in string templates using `\`, i. e. `\\` means `\`.
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## Determining the Length of Strings
@@ -333,7 +333,7 @@ len_c = numofchar( 'abc ' ). "3
len_str = numofchar( `abc ` ). "3
```
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## Concatenating Strings
@@ -379,7 +379,7 @@ s1 = concat_lines_of( table = itab ). "Without separator
s1 = concat_lines_of( table = itab sep = ` ` ). "With separator
```
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## Splitting Strings
@@ -420,7 +420,7 @@ SPLIT s1 AT ',' INTO TABLE itab. "Strings are added to itab in individual lines
s2 = segment( val = s1 index = 2 sep = `,` ). "world
```
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## Modifying Strings
**Transforming to Lowercase and Uppercase**
@@ -609,7 +609,7 @@ OVERLAY txt1 WITH txt2 ONLY 'ab'.
"txt1: z.x.c.Z.x.c.A
```
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## Processing Substrings
@@ -694,7 +694,7 @@ s2 = substring_from( val = s1 sub = `a3` ). "a3bb4
s2 = substring_to( val = s1 sub = `3b` ). "aa1bb2aa3b
```
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## Searching and Replacing
@@ -715,7 +715,7 @@ on single characters only or more complex, pattern-based
operations on character sequences using [PCRE regular
expressions](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abenpcre_regex_glosry.htm "Glossary Entry").
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### Searching for Specific Characters
@@ -807,7 +807,7 @@ res = count_any_not_of( val = str sub = `Piecs ofak.` ). "0
```
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### Replacing Specific Characters in Strings
@@ -841,7 +841,7 @@ s2 = translate( val = s1 from = `_` to = `##` ). "###abc#def#####ghi#
TRANSLATE s1 USING `_.a#g+`. "...#bc.def.....+hi.
```
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### Searching for Substrings in Strings (and Tables)
@@ -1168,7 +1168,7 @@ TRY.
ENDTRY.
```
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### Replacing Substrings in Strings (and Tables)
@@ -1415,7 +1415,7 @@ regular
expressions](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abenposix_regex_glosry.htm "Glossary Entry")
anymore, they are obsolete.
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### Simple Pattern-Based Searching Using Comparison Operators
@@ -1451,7 +1451,7 @@ IF s1 CP `*f#_*`. ... "true; sy-fdpos = 6
IF s1 NP `i+`. ... "true; sy-fdpos = 11 (length of searched string)
```
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### Complex Searching and Replacing Using Regular Expressions
@@ -1517,7 +1517,7 @@ Anchors and Positions
| `\b` | Start or end of word | 1. `\ba.` <br>2. `\Dd\b` <br>3. `\b.d\b` | abcd a12d ed | 1. <ins>**ab**</ins>cd <ins>**a1**</ins>2d ed <br>2. ab<ins>**cd**</ins> a12d <ins>**ed**</ins> <br> 3. abcd a12d <ins>**ed**</ins> | 1. ab<ins>**cd**</ins> a1<ins>**2d**</ins> ed <br> 2. abcd a1<ins>**2d**</ins> ed <br> 3. <ins>**abcd**</ins> <ins>**a12d**</ins> ed |
| `\B` | Negation of `\b`, not at the start or end of words | `\Be\B` | see an elefant | s<ins>**e**</ins>e an el<ins>**e**</ins>fant | s<ins>**ee**</ins> an <ins>**e**</ins>lefant |
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#### Searching Using Regular Expressions
@@ -1575,7 +1575,7 @@ DATA(itab) = value string_table( ( `Cathy's black cat on the mat played with the
FIND FIRST OCCURRENCE OF PCRE `\bt.` IN TABLE itab
IGNORING CASE MATCH LINE DATA(d) MATCH OFFSET DATA(e) MATCH LENGTH DATA(f). "d: 1, e: 21, f: 2
```
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##### Excursion: System Classes for Regular Expressions
@@ -1608,7 +1608,7 @@ DATA(res) = cl_abap_regex=>create_pcre( pattern = `\s\w` "any blank follow
ignore_case = abap_true )->create_matcher( text = str )->find_all( ).
```
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#### Replacing Using Regular Expressions
@@ -1660,7 +1660,7 @@ s2 = replace( val = s1
REPLACE PCRE `(.*?)PP(.*)` IN s1 WITH `$2#$1` IGNORING CASE. "pc app#ab a
```
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## Executable Example
[zcl_demo_abap_string_proc](./src/zcl_demo_abap_string_proc.clas.abap)