new 0.5.4 features

Author: Nelson-numerical-software

README.md

@@ -49,6 +49,7 @@ Nelson has been developed to be an open/modular system where an user can define
 - [Nelson in the Cloud](CLOUD.md) ☁️,
 - [Audio module](AUDIO.md),
 - [UNICODE and charset support](CHARSET.md),
+- [validators functions](VALIDATORS.md),
 - [Code editor](CODE_EDITOR.md).
 
 ## [Sources](https://github.com/Nelson-numerical-software/nelson)
@@ -72,7 +73,9 @@ The systems listed here without CI or binaries are known to build and operate, b
 |    Windows 7+    | x86-64 (64-bit) |  ✓  |    ✓     |
 |                  |  i686 (32-bit)  |  ✓  |    ✓     |
 |   MacOS 10.10+   | x86-64 (64-bit) |  ✓  |          |
+|   Ubuntu 20.04   | x86-64 (64-bit) |     |          |
 |   Ubuntu 18.04   | x86-64 (64-bit) |  ✓  |          |
+|   Ubuntu 16.04   | x86-64 (64-bit) |  ✓  |          |
 |    Debian 10     | x86-64 (64-bit) |  ✓  |          |
 |    Fedora 30     | x86-64 (64-bit) |  ✓  |          |
 |    ArchLinux     | x86-64 (64-bit) |  ✓  |          |

TESTSENGINE.md

@@ -1,6 +1,8 @@
 ## Tests engine
 
 Validate your algorithm using Nelson dedicated [functions](https://nelson-numerical-software.github.io/nelson-website/help/en_US/chapter_assert_functions.html).
+
+Since v0.5.4, tests are executed on multiple workers on all platforms supported (linux, mac and windows).
 ![alt text](https://github.com/Nelson-numerical-software/nelson-website/raw/master/images/test_run.png "test_run")
 
 Export the test results under the xUnit reports format.

VALIDATORS.md

@@ -0,0 +1,24 @@
+## Validators functions
+
+Property Validation Functions:
+These functions support common use patterns for validation and provide descriptive error messages.
+
+```nelson
+function r = myFunction(arg1, arg2)
+    mustBeFloat(arg1, 1)
+    mustBeFloat(arg2, 2)
+    mustBeScalarOrEmpty(arg1, 1)
+    mustBeScalarOrEmpty(arg2, 2)
+    r = arg1 + arg2
+endfunction
+```
+
+```nelson
+r = myFunction('a', 2)
+r = myFunction([1 2], 2)
+r = myFunction(1, [3 2])
+```
+
+See help about [validations function](https://nelson-numerical-software.github.io/nelson-website/help/en_US/chapter_validators.html)
+
+[Previous page](FEATURES.md)