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converts Lua scalar value to a 4-byte float, and stores the float in the resulting string
d
converts Lua scalar value to a 8-byte double, and stores the double in the resulting string
a, A
converts Lua scalar value to a sequence of bytes, and stores the sequence in the resulting string
Parameters
string containing format specifiers
scalar values to be formatted
return
a binary string containing all arguments, packed according to the format specifiers.
rtype
string
A scalar value can be either a variable or a literal. Remember that large integers should be entered with :ref:`tonumber64() or LL or ULL suffixes <index-box_number>`.
Possible errors: unknown format specifier.
**Example:**
tarantool> pickle = require('pickle')
---
...
tarantool> box.space.tester:insert{0, 'hello world'}
---
- [0, 'hello world']
...
tarantool> box.space.tester:update({0}, {{'=', 2, 'bye world'}})
---
- [0, 'bye world']
...
tarantool> box.space.tester:update({0}, {
> {'=', 2, pickle.pack('iiA', 0, 3, 'hello')}
> })
---
- [0, "\0\0\0\0\x03\0\0\0hello"]
...
tarantool> box.space.tester:update({0}, {{'=', 2, 4}})
---
- [0, 4]
...
tarantool> box.space.tester:update({0}, {{'+', 2, 4}})
---
- [0, 8]
...
tarantool> box.space.tester:update({0}, {{'^', 2, 4}})
---
- [0, 12]
...
Counterpart to ``pickle.pack()``. Warning: if format specifier 'A' is used, it must be the last item.
A list of strings or numbers.
table
tarantool> pickle = require('pickle')
---
...
tarantool> tuple = box.space.tester:replace{0}
---
...
tarantool> string.len(tuple[1])
---
- 1
...
tarantool> pickle.unpack('b', tuple[1])
---
- 48
...
tarantool> pickle.unpack('bsi', pickle.pack('bsi', 255, 65535, 4294967295))
---
- 255
- 65535
- 4294967295
...
tarantool> pickle.unpack('ls', pickle.pack('ls', tonumber64('18446744073709551615'), 65535))
---
...
tarantool> num, num64, str = pickle.unpack('slA', pickle.pack('slA', 666,
> tonumber64('666666666666666'), 'string'))
---
...

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New source string

testing_project / Documentation: reference/reference_lua/pickle — English

tarantool> pickle = require('pickle')
---
...
tarantool> box.space.tester:insert{0, 'hello world'}
---
- [0, 'hello world']
...
tarantool> box.space.tester:update({0}, {{'=', 2, 'bye world'}})
---
- [0, 'bye world']
...
tarantool> box.space.tester:update({0}, {
> {'=', 2, pickle.pack('iiA', 0, 3, 'hello')}
> })
---
- [0, "\0\0\0\0\x03\0\0\0hello"]
...
tarantool> box.space.tester:update({0}, {{'=', 2, 4}})
---
- [0, 4]
...
tarantool> box.space.tester:update({0}, {{'+', 2, 4}})
---
- [0, 8]
...
tarantool> box.space.tester:update({0}, {{'^', 2, 4}})
---
- [0, 12]
...
a year ago
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String age
a year ago
Last updated
a year ago
Source string age
a year ago
Translation file
string 42