New numericFilters documentation

README.md

@@ -264,7 +264,12 @@ You can use the following optional arguments:
 
 #### Numeric search parameters
  * **setNumericFilters**: a string that contains the list of numeric filters you want to apply separated by a comma. The syntax of one filter is `attributeName` followed by `operand` followed by `value`. Supported operands are `<`, `<=`, `=`, `>` and `>=`. 
- You can have multiple conditions on one attribute like for example `numericFilters=price>100,price<1000`. You can also use a string array encoding (for example `numericFilters: ["price>100","price<1000"]`).
+
+You can easily perform range queries via the `:` operator (equivalent to combining a `>=` and `<=` operand), for example `numericFilters=price:10 to 1000`.
+
+You can also mix OR and AND operators. The OR operator is defined with a parenthesis syntax. For example `(code=1 AND (price:[0-100] OR price:[1000-2000]))` translates in `encodeURIComponent("code=1,(price:0 to 10,price:1000 to 2000)")`.
+
+You can also use a string array encoding (for example `numericFilters: ["price>100","price<1000"]`).
 
 #### Category search parameters
  * **setTagFilters**: filter the query by a set of tags. You can AND tags by separating them by commas. To OR tags, you must add parentheses. For example, `tags=tag1,(tag2,tag3)` means *tag1 AND (tag2 OR tag3)*. You can also use a string array encoding, for example `tagFilters: ["tag1",["tag2","tag3"]]` means *tag1 AND (tag2 OR tag3)*.<br/>At indexing, tags should be added in the **_tags** attribute of objects (for example `{"_tags":["tag1","tag2"]}`).