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## Regular expression problem

Jun 15, 2016

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Dear friends,

In my script i have some sections which test the content of an edit field before it is processed further.

Things like the following work perfectly:

`var re_Def = /#[A-Za-z][A-Za-z0-9_]+/;          // valid variable name ?items = ["#correct", "notcorrect", "#This_is4", "#thisIs", "@something", "#ALLOK", "", ];// search    0            -1          -1!!        -1!!          -1        -1!!     -1      <--- incorrect method// test    true         false         true        true        false       true    false    <--- correct methodfor (var j = 0; j < items.length; j++) {  var item = items;  alert ("'" + item + "' ==> " +  item.search(re_Def) + "\n" + re_Def.test(item));}var re_Def = /(\[ROW +\d+\]|\[COL +\d+\]|\[CELL +\d+, +\d+\]|Left *\(\d*\)|Right *\(\d*\)|Above *\(\d*\)|Below *\(\d*\))/;items = ["[ROW 17]", "[Row n]", "[ROW n]", "[CELL 3, 9]", "[CELL 3 9]", "Abbove()", "Right(3)"];// result  true        false      false         true         false        false         true    for (var j = 0; j < items.length; j++) {  alert ("'" + items + "' ==> " +  re_Def.test(items));}`

But the following always return false, independly of the content of the string item:

`var re_Def = /{[EFJ]\d*}|{I}/;    // valid format def?var item = "{E27}";var result = re_Def.test(item);alert (result);                   // false !!`

RegEx Buddy tells me, that
- the REGEX is correct
- the result should be true, not false

- The verbose defintion of the RegEx is:
Match either the regular expression below (attempting the next alternative only if this one fails) «{[EFJ]\d*}»
Match the character “{” literally «{»
Match a single character present in the list “EFJ” «[EFJ]»
Match a single digit 0..9 «\d*»
Between zero and unlimited times, as many times as possible, giving back as needed (greedy) «*»
Match the character “}” literally «}»
Or match regular expression number 2 below (the entire match attempt fails if this one fails to match) «{I}»
Match the characters “{I}” literally «{I}»

Unrecognised typo? Faulty method test?

Results are wrong as soon as i use character list [...] - but look at the first code block: there are also character lists which are handled correctly.

Explorer
| Explorer

The curly brackets in the regular expression need to be escaped to be taken literally:

`var re_Def = /\{[EFJ]\d*\}/;`

Kind regards

JoH

TOPICS
Scripting

Views

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## Regular expression problem

Jun 15, 2016

Copied

Dear friends,

In my script i have some sections which test the content of an edit field before it is processed further.

Things like the following work perfectly:

`var re_Def = /#[A-Za-z][A-Za-z0-9_]+/;          // valid variable name ?items = ["#correct", "notcorrect", "#This_is4", "#thisIs", "@something", "#ALLOK", "", ];// search    0            -1          -1!!        -1!!          -1        -1!!     -1      <--- incorrect method// test    true         false         true        true        false       true    false    <--- correct methodfor (var j = 0; j < items.length; j++) {  var item = items;  alert ("'" + item + "' ==> " +  item.search(re_Def) + "\n" + re_Def.test(item));}var re_Def = /(\[ROW +\d+\]|\[COL +\d+\]|\[CELL +\d+, +\d+\]|Left *\(\d*\)|Right *\(\d*\)|Above *\(\d*\)|Below *\(\d*\))/;items = ["[ROW 17]", "[Row n]", "[ROW n]", "[CELL 3, 9]", "[CELL 3 9]", "Abbove()", "Right(3)"];// result  true        false      false         true         false        false         true    for (var j = 0; j < items.length; j++) {  alert ("'" + items + "' ==> " +  re_Def.test(items));}`

But the following always return false, independly of the content of the string item:

`var re_Def = /{[EFJ]\d*}|{I}/;    // valid format def?var item = "{E27}";var result = re_Def.test(item);alert (result);                   // false !!`

RegEx Buddy tells me, that
- the REGEX is correct
- the result should be true, not false

- The verbose defintion of the RegEx is:
Match either the regular expression below (attempting the next alternative only if this one fails) «{[EFJ]\d*}»
Match the character “{” literally «{»
Match a single character present in the list “EFJ” «[EFJ]»
Match a single digit 0..9 «\d*»
Between zero and unlimited times, as many times as possible, giving back as needed (greedy) «*»
Match the character “}” literally «}»
Or match regular expression number 2 below (the entire match attempt fails if this one fails to match) «{I}»
Match the characters “{I}” literally «{I}»

Unrecognised typo? Faulty method test?

Results are wrong as soon as i use character list [...] - but look at the first code block: there are also character lists which are handled correctly.

Explorer
| Explorer

The curly brackets in the regular expression need to be escaped to be taken literally:

`var re_Def = /\{[EFJ]\d*\}/;`

Kind regards

JoH

TOPICS
Scripting

Views

191

Likes

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Jun 15, 2016 0
2 Replies 2
Explorer ,
Jun 15, 2016

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The curly brackets in the regular expression need to be escaped to be taken literally:

`var re_Def = /\{[EFJ]\d*\}/;`

Kind regards

JoH

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Jun 15, 2016 0
LATEST
Jun 15, 2016

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Thank You JoH,

Seems to be an error in RegexBuddy - as it accepts both escaped and unescaped braces here.

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