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Added truncatestream builtin function #2523

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Added truncatestream builtin function #2523

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2 changes: 2 additions & 0 deletions src/builtin.jq
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Original file line number Diff line number Diff line change
Expand Up @@ -224,6 +224,8 @@ def ascii_upcase:
# Streaming utilities
def truncate_stream(stream):
. as $n | null | stream | . as $input | if (.[0]|length) > $n then setpath([0];$input[0][$n:]) else empty end;
def truncatestream($n):
select(.[0] | length > $n) | .[0] |= .[$n:];
def fromstream(i): {x: null, e: false} as $init |
# .x = object being built; .e = emit and reset state
foreach i as $i ($init
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