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update documentation

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Daniel Kang 2019-01-27 17:33:24 -08:00
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@ -94,6 +94,21 @@ d := "hello world"[2:10] // == "llo worl"
``` ```
> [Run in Playground](https://tengolang.com/?s=214ab490bb24549578770984985f6b161aed915d) > [Run in Playground](https://tengolang.com/?s=214ab490bb24549578770984985f6b161aed915d)
## Conditional Expression
Tengo supports the ternary conditional expression (`cond ? expr1 : expr2`):
```golang
a := true ? 1 : -1 // a == 1
min := func(a, b) {
return a < b ? a : b
}
b := min(5, 10) // b == 5
```
> [Run in Playground](https://tengolang.com/?s=24724cc03e8ef2e56b7851017f8c2a577897961e)
## Functions ## Functions
In Tengo, functions are first-class citizen, and, it also supports closures, functions that captures variables in outer scopes. In the following example, the function returned from `adder` is capturing `base` variable. In Tengo, functions are first-class citizen, and, it also supports closures, functions that captures variables in outer scopes. In the following example, the function returned from `adder` is capturing `base` variable.