压扁数组在对象中

Question

是否有一种优雅的方式来复制每个数组项目中的对象？

printf '{"a":"","b":[{},{}]}' | jq '{a:.a,b:.b[]}' 
{"a":"","b":{}} 
{"a":"","b":{}} 

Answer 1

这里的扩大的任意JSON对象的所有数组值密钥的编程方法：

def blowup(a): 
    def b(f): {(f): (.[f] | if type == "array" then .[] else . end)}; 

    if a|length == 0 then {} else b(a[0]) + blowup(a[1:]) end; 

blowup(keys) 

实施例：

输入：{A：0，B：[1,2 ]，C：[3,4]}

输出：

{"a":0,"b":1,"c":3} 
{"a":0,"b":2,"c":3} 
{"a":0,"b":1,"c":4} 
{"a":0,"b":2,"c":4}