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updated documentation

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Jan Steemann 2016-05-09 12:19:44 +02:00
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Documentation/Books/Users/ReleaseNotes/UpgradingChanges30.mdpp
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@ -163,6 +163,47 @@ they programatically look for applied optimizer rules in the explain out of AQL
The following incompatible changes have been made to the JavaScript API in ArangoDB 3.0:
!SUBSECTION Upgraded V8 version
The V8 engine that is used inside ArangoDB to execute JavaScript code has been upgraded from
version 4.3.61 to 5.0.71.39. The new version should be mostly compatible to the old version,
but there may be subtle differences, including changes of error message texts thrown by the
engine.
Furthermore, some V8 startup parameters have changed their meaning or have been removed in
the new version. This is only relevant when ArangoDB or ArangoShell are started with a custom
value for the `--javascript.v8-options` startup option.
Among others, the following V8 options change in the new version of ArangoDB:
- `--es_staging`: in 2.8 it had the meaning `enable all completed harmony features`, in 3.0
the option means `enable test-worthy harmony features (for internal use only)`
- `--strong_this`: this option wasn't present in 2.8. In 3.0 it means `don't allow 'this' to escape from constructors`
and defaults to true.
- `--harmony_regexps`: this options means `enable "harmony regular expression extensions"`
and changes its default value from false to true
- `--harmony_proxies`: this options means `enable "harmony proxies"` and changes its default
value from false to true
- `--harmony_reflect`: this options means `enable "harmony Reflect API"` and changes its default
value from false to true
- `--harmony_sloppy`: this options means `enable "harmony features in sloppy mode"` and changes
its default value from false to true
- `--harmony_tostring`: this options means `enable "harmony toString"` and changes its default
value from false to true
- `--harmony_unicode_regexps`: this options means `enable "harmony unicode regexps"` and changes
its default value from false to true
- `--harmony_arrays`, `--harmony_array_includes`, `--harmony_computed_property_names`,
`--harmony_arrow_functions`, `--harmony_rest_parameters`, `--harmony_classes`,
`--harmony_object_literals`, `--harmony_numeric_literals`, `--harmony_unicode`:
these option have been removed in V8 5.
!SUBSECTION Edges API
When completely replacing an edge via a collection's `replace()` function the replacing