#jsonpath

• requirement:
  • golang 1.9
• operators: TODO

• source url：https://github.com/oliveagle TODO finish those uncompleted

supported syntax:

• / $ the root object/element
• . @ the current object/element
• / . or [] child operator
• // .. recursive descent. JSONPath borrows this syntax from E4X.

• • * 	wildcard. All objects/elements regardless their names.
    

• [] [] subscript operator. XPath uses it to iterate over element collections and for predicates. In Javascript and JSON it is the native array operator.
• | [,] Union operator in XPath results in a combination of node sets. JSONPath allows alternate names or array indices as a set.
• n/a [start:end:step] array slice operator borrowed from ES4.
• [] ?() applies a filter (script) expression. unsupported syntax: n/a () script expression, using the underlying script engine.

filter script expression only supports finit expression like: @aaa op other @.number >= $.number // means filters the current node which number greater than root number