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| Release history |
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| * jq version 1.5 was released on Sat Aug 15 2015 |
| * jq version 1.4 was released on Mon Jun 9 2014 |
| * jq version 1.3 was released on Sun May 19 2013 |
| * jq version 1.2 was released on Thu Dec 20 2012 |
| * jq version 1.1 was released on Sun Oct 21 2012 |
| * jq version 1.0 was released on Sun Oct 21 2012 |
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| New features in 1.5 since 1.4: |
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| - regular expressions (with Oniguruma) |
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| - a library/module system |
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| - many new builtins |
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| - datetime builtins |
| - math builtins |
| - regexp-related builtins |
| - stream-related builtins (e.g., all/1, any/1) |
| - minimal I/O builtins (`inputs`, `debug`) |
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| - new syntactic features, including: |
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| - destructuring (`. as [$first, $second] | ...`) |
| - try/catch, generalized `?` operator, and label/break |
| - `foreach` |
| - multiple definitions of a function with different numbers of |
| arguments |
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| - command-line arguments |
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| - --join-lines / -j for raw output |
| - --argjson and --slurpfile |
| - --tab and --indent |
| - --stream (streaming JSON parser) |
| - --seq (RFC7464 JSON text sequence) |
| - --run-tests improvements |
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| - optimizations: |
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| - tail-call optimization |
| - reduce and foreach no longer leak a reference to . |
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| New features in 1.4 since 1.3: |
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| - command-line arguments |
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| - jq --arg-file variable file |
| - jq --unbuffered |
| - jq -e / --exit-status (set exit status based on outputs) |
| - jq -S / --sort-keys (now jq no longer sorts object keys by |
| default |
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| - syntax |
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| - .. -> like // in XPath (recursive traversal) |
| - question mark (e.g., .a?) to suppress errors |
| - ."foo" syntax (equivalent to .["foo"]) |
| - better error handling for .foo |
| - added % operator (modulo) |
| - allow negation without requiring extra parenthesis |
| - more function arguments (up to six) |
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| - filters: |
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| - any, all |
| - iterables, arrays, objects, scalars, nulls, booleans, numbers, |
| strings, values |
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| - string built-ins: |
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| - split |
| - join (join an array of strings with a given separator string) |
| - ltrimstr, rtrimstr |
| - startswith, endswith |
| - explode, implode |
| - fromjson, tojson |
| - index, rindex, indices |
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| - math functions |
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| - floor, sqrt, cbrt, etetera (depends on what's available from libm) |
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| - libjq -- a C API interface to jq's JSON representation and for |
| running jq programs from C applications |
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