murex Shell Docs

Command Reference: [ (index)

Outputs an element from an array, map or table

Description

Outputs an element or multiple elements from an array, map or table.

Please note that indexes in murex are counted from zero.

Usage

<stdin> -> [ element ] -> <stdout>
$variable[ element ] -> <stdout>

<stdin> -> ![ element ] -> <stdout>

Examples

Return the 2nd (1), 4th (3) and 6th (5) element in an array

» ja [0..9] -> [ 1 3 5 ]
[
    "1",
    "3",
    "5"
]

Return the data-type and description of config shell syntax-highlighting

» config -> [[ /shell/syntax-highlighting ]] -> [ Data-Type Description ]
[
    "bool",
    "Syntax highlighting of murex code when in the interactive shell"
]

Return all elements except for 1 (2nd), 3 (4th) and 5 (6th)

» a: [0..9]-> ![ 1 3 5 ]
0
2
4
6
7
8
9

Return all elements except for the data-type and description

» config -> [[ /shell/syntax-highlighting ]] -> ![ Data-Type Description ]
{
    "Default": true,
    "Dynamic": false,
    "Global": true,
    "Value": true
}

Detail

Index counts from zero

Indexes in murex behave like any other computer array in that all arrays start from zero (0).

Include vs exclude

As demonstrated in the examples above, [ specifies elements to include where as ![ specifies elements to exclude.

Don't error upon missing elements

By default, index generates an error if an element doesn't exist. However you can disable this behavior in config

» config -> [ foobar ]
Error in `[` ((builtin) 2,11): Key 'foobar' not found

» config set index silent true

» config -> [ foobar ]

Synonyms

See Also

This site's content is rebuilt automatically from murex's source code after each merge to the master branch. Downloadable murex binaries are also built with the website.

Last built on Tue Jun 22 08:18:17 UTC 2021 against commit 2235c7b2235c7b18f86f1cf214e246b88b0ea193d87fe80.

Current version is 2.2.1100 BETA which has been verified against tests.