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| -rw-r--r-- | jq.html.markdown | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/jq.html.markdown b/jq.html.markdown index 5aa03b91..31ce4d43 100644 --- a/jq.html.markdown +++ b/jq.html.markdown @@ -245,8 +245,37 @@ jq -n '[2*3, 8-1, 16/2], {("tw" + "o"): (1 + 1)}' # jq -n '{ key_1: "value1" }' +# If a JSON object's key's value is ommited, it is looked up in the current +# input using the key: +# +jq -n '{ c: 3} | { a: 1, "b", c }' + # Output: -# +# { +# "a": 1, +# "b": null, +# "c": 3 +# } + + +# jq programs are more commonly written as a series of expressions (filters) +# connected by the pipe (`|`) operator, which makes the output of its left filter +# the input to its right filter. +# +jq -n '1 | . + 2 | . + 3' # first dot is 1; second dot is 3 + +# Output: +# 6 + +# If an expression evaluates to multiple outputs, then jq will iterate through +# them and propagate each output down the pipeline, and generate multiple +# outputs in the end. +# +jq -n '1, 2, 3 | ., 4 | .' + +# Output: +# 1 +# 4 # 2 # 4 # 3 |