esi-string

The esi-string library provides basic string operations

Changes

Version Date Description s:i Release

1.0.4

2020-10-03

Fix links and section titles in the docs

-

1.0.3

2018-08-26

STRING fix (no more "nil" return)

1.40

1.0.2

2018-06-25

SPLIT fix

1.36

1.0.1

2018-06-24

SPLIT reworked

1.36

1.0.0

2018-06-03

First system:inmation inclusion

1.34

0.1.2

2018-05-27

More data type tolerance in SPLIT

-

0.1.1

2018-05-23

Initial release

-

Dependencies

library version inmation core library

dkjson

2.5

yes

Available functions

All functions have to be called according to the ESI standard, using colons, e.g. STR:COMPNOCASE("a","A")

Documentation

CLEAN

CLEAN(str)

Trims a given string (removes leading and trailing spaces) and returns this string.

COMPNOCASE

COMPNOCASE(str1, str2)

Returns true if the given arguments str1 and str2 are equal (case-insensitive).

DEQUOTE

DEQUOTE(str)

Removes quotes from a string.

EMPTY

EMPTY(str)

Returns true if the given argument is either an empty string or comparable (such as nil).

FINDNOCASE

FINDNOCASE(str, what)

Returns true if the given argument what was found in str (case-insensitive).

INFO

This is a mandatory function for every ESI library. It returns the INFO table for the library.

Usage

    local STR=require('esi-string')
    error(STR:STRING(STR:INFO()))

MAKESTRINGTABLE

MAKESTRINGTABLE(x)

Takes any argument and turns it into a string table, which is returned. Any argument excludes nested tables.

NONEOF

NONEOF(x, …​)

Tests a given string against a variable list of strings to compare with and returns true if no match was found. The comparison is case-insensitive.

ONEOF

ONEOF(x, …​)

Tests a given string against a variable list of strings to compare with and returns true if one match was found. The comparison is case-insensitive.

SPLIT

SPLIT(str, separator)

Splits a string according to the given separator. The function considers quoted parts in the string, so that the quoted parts are not split. The function returns a table of strings.

STRING

STRING(par)

Returns the given argument par as string. If par is a table, the table will be encoded in JSON. As such, the function may return huge strings. Be careful.

Usage

    local STR = require('esi-string')
    local test = { a="A", b="B", c={a="A in c", b="B in c" } }
    error(STR:STRING(test))

TOTABLE

TOTABLE(str)

Returns the given argument str as table, expecting valid JSON format. Nil will be returned for invalid JSON. {} will be returned for empty string.

ESCAPE

ESCAPE(x)

Escapes a lua string so that the lua function string.gsub works as expected. Useful when trying to gsub parts of a path for example.

Useage

    local STR = require('esi-string')
    local somepath = "/System/Core/Connector/Aspen.Infoplus21_DA.1/asd/asd"
    b = a:gsub(STR:ESCAPE("/System/Core/Connector/Aspen.Infoplus21_DA.1"), "..")
    --b is now ../asd/asd, i.e. the path relative to the datasource

LUATYPE

LUATYPE(x)

Tries to convert the given string to a number or a boolean. If not possible, returns the string originally passed.

Useage

    local STR = require('esi-string')
    local converted, typename = STR:LUATYPE("true") --type is either "number", "boolean", or "string"
    if type(converted) == "boolean" and typename == "boolean" then
        return true --is true
    end
    --converted is now true, type(converted) is boolean