正则表达式在两个字符串之间查找字符串，不包括外部字符串

Question

I know this has been asked a thousand times before, but I could not get any of the previous solutions working for my case. I'm trying to use Regex in Javascript to parse a text file. The bit I'm trying to extract is the monetary figure, with a format like 55,555.00. The numbers of digits here can vary throughout the text file. Additionally, the boundary characters and spaces can vary.

I wrote the following to extract what I need from the sample code below:

/((\w\s{10,20})([0-9]{8,}(?=.*[,.]))/g

sample code:

                  23205        - Grants Current-County Operatin                        4,425,327.00"

"    4   0000047387         Central Equatoria State          1003-1478 Sta Hosp Oper Oct                   85,784.00"
"    4   0000047442         EASTERN EQUATORIA ST             1003-1479 Sta Hosp Oper Oct                   93,137.00"
"    4   0000047485         JONGLEI STATE                    1003-1519 Sta Hosp Oper Oct                  144,608.00"
"    4   0000047501         Lakes State                      1003-1482 Sta Hosp Oper Oct                   93,137.00"
"    4   0000047528         Unity State                      1003-1484 Sta Hosp Oper Oct                   75,980.00"
"    4   0000047532         Northern Bahr-el State           1003-1483 Sta Hosp Oper Oct                   58,824.00"
"    4   0000047615         Western E State                  1003-1488 Sta Hosp Oper Oct                   93,137.00"
"    4   0000047638         Warap State                      1003-1486 Sta Hosp Oper Oct                   51,471.00"
"    4   0000047680         Upper Nile State                 1003-1485 Sta Hosp Oper Oct                  102,941.00"
"    4   0000047703         Western BG State                 1003-1487 Sta Hosp Oper Oct                   34,314.00"
                                                                                             ----------------------
"        Total For Period          4                                                                      833,333.00"
 ----------------------------------------------------------------------------------------------------------------------------
 Fiscal Year        2015/16                               Republic Of South Sudan                         Date     2015/11/20
 Period                   5                                                                               Time       12:58:40
                                                  FreeBalance Financial Management System                 Page              7
 ----------------------------------------------------------------------------------------------------------------------------
                                                            Vendor Analysis Report

                                                              1091 Health (MOH)
  Prd   Voucher #          Vendor Name                      Description                          Amount
  ---   ----------------   ------------------------------   -----------------------------    ----------------------
                                                                                             ----------------------
"  

Here's an example: https://regex101.com/r/nO8nM1/4

The issue is the leading boundary. I am able to exclude the closing boundary (double quotes), but I can't get rid of the leading boundary. I've gotten a couple things sort of working, but they included the two strings of digits outside the main tables (in this case 4,425,327.00 and 833,333.00).

Any help would be much appreciated.

Answer 1

To match float values with obligatory decimal fractions and , as a digit grouping symbol, you can use

\d+(?:,\d{3})*\.\d+

See demo

Explanation :

• \\d+ - 1 or more digits
• (?:,\\d{3})* - 0 or more sequences of
  • , - a comma
  • \\d{3} - exactly 3 digits
• \\. - a literal period/dot
• \\d+ - 1 or more digits.

To only get the values that appear after Oct , you may use a regex that is a mix of the pattern above and yours:

\w\s{10,20}(\d+(?:,\d{3})*\.\d+)

See another demo

The \\w\\s{10,20} matches an alphanumeric \\w and then 10 to 20 whitespace characters, and only after that the pattern matches and captures into Group 1 the float value.

See JS snippet below ( m[1] is where the float value resides):

 var re = /\\w\\s{10,20}(\\d+(?:,\\d{3})*\\.\\d+)/gm; var str = ' 23205 - Grants Current-County Operatin 4,425,327.00"\\n\\n" 4 0000047387 Central Equatoria State 1003-1478 Sta Hosp Oper Oct 85,784.00"\\n" 4 0000047442 EASTERN EQUATORIA ST 1003-1479 Sta Hosp Oper Oct 93,137.00"\\n" 4 0000047485 JONGLEI STATE 1003-1519 Sta Hosp Oper Oct 144,608.00"\\n" 4 0000047501 Lakes State 1003-1482 Sta Hosp Oper Oct 93,137.00"\\n" 4 0000047528 Unity State 1003-1484 Sta Hosp Oper Oct 75,980.00"\\n" 4 0000047532 Northern Bahr-el State 1003-1483 Sta Hosp Oper Oct 58,824.00"\\n" 4 0000047615 Western E State 1003-1488 Sta Hosp Oper Oct 93,137.00"\\n" 4 0000047638 Warap State 1003-1486 Sta Hosp Oper Oct 51,471.00"\\n" 4 0000047680 Upper Nile State 1003-1485 Sta Hosp Oper Oct 102,941.00"\\n" 4 0000047703 Western BG State 1003-1487 Sta Hosp Oper Oct 34,314.00"\\n ----------------------\\n" Total For Period 4 833,333.00"\\n ----------------------------------------------------------------------------------------------------------------------------\\n Fiscal Year 2015/16 Republic Of South Sudan Date 2015/11/20\\n Period 5 Time 12:58:40\\n FreeBalance Financial Management System Page 7\\n ----------------------------------------------------------------------------------------------------------------------------\\n Vendor Analysis Report\\n\\n 1091 Health (MOH)\\n Prd Voucher # Vendor Name Description Amount\\n --- ---------------- ------------------------------ ----------------------------- ----------------------\\n ----------------------\\n" '; var m; while ((m = re.exec(str)) !== null) { document.getElementById("r").innerHTML += m[1] + "<br/>"; } 

 <div id="r"/>