62 lines
1.0 KiB
Markdown
62 lines
1.0 KiB
Markdown
---
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title: strings.countStr() function
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description: >
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The strings.countStr() function counts the number of non-overlapping instances
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of a substring appears in a string.
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menu:
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v2_0_ref:
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name: strings.countStr
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parent: Strings
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weight: 301
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---
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The `strings.countStr()` function counts the number of non-overlapping instances
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of a substring appears in a string.
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_**Output data type:** Integer_
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```js
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import "strings"
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strings.countStr(v: "Hello mellow fellow", substr: "ello")
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// returns 3
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```
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## Parameters
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### v
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The string value to search.
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_**Data type:** String_
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### substr
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The substring to count.
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_**Data type:** String_
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{{% note %}}
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The function counts only non-overlapping instances of `substr`.
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For example:
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```js
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strings.coutnStr(v: "ooooo", substr: "oo")
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// Returns 2 -- (oo)(oo)o
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```
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{{% /note %}}
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## Examples
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###### Count instances of a substring within a string
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```js
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import "strings"
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data
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|> map(fn: (r) => ({
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r with
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_value: strings.countStr(v: r.message, substr: "uh")
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})
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)
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```
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