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Florian Angerer authoredFlorian Angerer authored
binSearch.r 1.33 KiB
#
# Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
#
# This code is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 2 only, as
# published by the Free Software Foundation.
#
# This code is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
# version 2 for more details (a copy is included in the LICENSE file that
# accompanied this code).
#
# You should have received a copy of the GNU General Public License version
# 2 along with this work; if not, write to the Free Software Foundation,
# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
# or visit www.oracle.com if you need additional information or have any
# questions.
#
# Returns the index of the value in the sorted vector.
binSearch <- function(vec, value) {
low <- 1L
high <- length(vec)+1L
while(low < high) {
idx <- as.integer((low + high) / 2L)
if(vec[[idx]] == value) {
return (idx)
} else if(vec[[idx]] < value) {
low <- idx
} else {
high <- idx
}
}
}