go-pkg/expr
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Doc: fixed some typo and added some list details

Browse Source
This commit is contained in:
Celestino Amoroso 2024-05-10 04:49:03 +02:00
parent 9c2eca40d7
commit 8346e28340
1 changed files with 31 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
doc/Expr.adoc
View File

@ -141,7 +141,7 @@ Numbers can be integers (GO int64) or float (GO float64). In mixed operations in
|===
=== Fractions
_Expr_ also suports fractions. Fraction literals are made with tow integers separated by a vertical bar `|`.
_Expr_ also supports fractions. Fraction literals are made with two integers separated by a vertical bar `|`.
.Examples
// [source,go]
@ -149,7 +149,7 @@ _Expr_ also suports fractions. Fraction literals are made with tow integers sepa
`>>>` [blue]`1 | 2` +
[green]`1|2` +
`>>>` [blue]`4|6` +
[green]`2|3` [gray]_Fractions are always reduced to theri lowest terms_ +
[green]`2|3` [gray]_Fractions are always reduced to their lowest terms_ +
`>>>` [blue]`1|2 + 2|3` +
[green]`7|6` +
`>>>` [blue]`1|2 * 2|3` +
@ -245,7 +245,7 @@ Currently, boolean operations are evaluated using _short cut evaluation_. This m
<1> This multi-expression returns _1_ because in the first expression the left value of [blue]`or` is _true_ and as a conseguence its right value is not computed. Therefore the _a_ variable only receives the integer _1_.
====
=== List
=== Lists
_Expr_ supports list of mixed-type values, also specified by normal expressions.
.List examples
@ -258,7 +258,6 @@ _Expr_ supports list of mixed-type values, also specified by normal expressions.
[ [1,"one"], [2,"two"]] // List of lists
----
.List operators
[cols="^2,^2,5,4"]
|===
@ -269,6 +268,34 @@ _Expr_ supports list of mixed-type values, also specified by normal expressions.
| [blue]`-` | _Difference_ | Left list without elements in the right list | [blue]`[1,2,3] - [2]` _[ [1,3] ]_
|===
The items of array can be accessed using the dot `.` operator.
.Item access syntax
[source,bnf]
----
<item> ::= <list-expr>"."<index-expr>
----
.Items of list
[source,go]
----
`>>>` [blue]`[1,2,3].1`
[green]`2`
`>>>` [blue]`list=[1,2,3]; list.1`
[green]`2`
`>>>` [blue]`["one","two","three"].1`
[green]`two`
`>>>` [blue]`list=["one","two","three"]; list.(2-1)`
[green]`two`
`>>>` [blue]`list.(-1)`
[green]`three`
`>>>` [blue]`list.(-1)`
[green]`three`
`>>>` [blue]`list.(10)`
----
== Dictionaries
The _dictionary_ data-type is set of pairs _key/value_. It is also known as _map_ or _associative array_. Dictionary literals are sequences of pairs separated by comma `,`; sequences are enclosed between brace brackets.