char occurrences

[john7]

Hi All!

How can i find all char occurrences in a string.

For instance in the string -  "This is a string" the char "i" appears three times.

I use Labview 7.1.

Regards.

[MikeS81 · Accepted solution]

Hi john,

the attached image shows 2 methods how you can do it with LabVIEW 7.1. The first can be used if you only count a char, the second can be used to count strings.

Hope it helps.

Mike

[dan_u]

Even easier is to use "Search and Replace String" with 'replace all?' set to True. This will tell you how many replacements it did (and thus how many matches there are) .

[MikeS81]

---

@dan_u wrote:

Even easier is to use "Search and Replace String" with 'replace all?' set to True. This will tell you how many replacements it did (and thus how many matches there are) .

---

As far as i know this function (the output of the replacements) was not yet implemented in LabVIEW 7.1.

Mike

[dan_u]

---

@MikeS81 wrote:

---

@dan_u wrote:

Even easier is to use "Search and Replace String" with 'replace all?' set to True. This will tell you how many replacements it did (and thus how many matches there are) .

---

As far as i know this function (the output of the replacements) was not yet implemented in LabVIEW 7.1.

Mike

---

Hmm, it was available (http://zone.ni.com/reference/en-XX/help/lv/71/glang/Search_and_Replace_String/) but it did not return the number of replacements.
Too bad 😞

[aeastet]

Here is another method. It will depend on your ultimate goal as to what you need to do and what work best for you. I can think of 5 more ways to do the same thing that have not been suggested.

It really comes down to what you are trying to achieve.

[smercurio_fc]

---

@dan_u wrote:

Even easier is to use "Search and Replace String" with 'replace all?' set to True. This will tell you how many replacements it did (and thus how many matches there are) .

---

---

@Mike wrote:

As far as i know this function (the output of the replacements) was not yet implemented in LabVIEW 7.1.

---

Mike is correct. While the function existed in LabVIEW 7.1, it did not have the "number of replacements" output.

[john7]

Thank you guys!

The second method in Count_char_occurrences.png works realy good.

Best regards.

[Darin.K]

For the heck of it, my pre-S&R method of counting chars or strings was this:

[john7]

Darin.K that's good! Allows to count not only chars but substrings.