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switch.eo
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switch.eo
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# The MIT License (MIT)
#
# 2016-2022 Objectionary.com
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
+architect yegor256@gmail.com
+home https://github.com/objectionary/eo
+package org.eolang
+rt jvm org.eolang:eo-runtime:0.35.8
+version 0.35.8
# Allow to choose right options according to cases conditions.
# Parameter cases is the array of two dimensional array, which
# consist of condition bool value and expected value, if this
# condition is TRUE.
# e.g.
# switch
# *
# TRUE
# "this value will be returned"
# *
# FALSE
# "this value will be skipped"
#
# This object returns value of only first truly statement.
[cases] > switch
cases.length > len!
# Take case by given index.
# If case key is TRUE, return case value.
# Otherwise take next case.
[index] > case-at
if. > @
index.eq ^.len
TRUE
if.
at.
^.cases.at index > case!
0
case.at 1
^.case-at
index.plus 1
if. > @
cases.length.eq 0
error "switch cases are empty"
case-at 0