github.com/kisexp/xdchain@v0.0.0-20211206025815-490d6b732aa7/common/slice.go (about)

     1  // Copyright 2014 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package common
    18  
    19  // ContainsAll returns true if all elements in one of the targets are in the source,
    20  // false otherwise.
    21  func ContainsAll(source []string, targets ...[]string) bool {
    22  	mark := make(map[string]bool, len(source))
    23  	for _, str := range source {
    24  		mark[str] = true
    25  	}
    26  	for _, target := range targets {
    27  		foundAll := true
    28  		for _, str := range target {
    29  			if _, found := mark[str]; !found {
    30  				foundAll = false
    31  				break
    32  			}
    33  		}
    34  		if foundAll {
    35  			return true
    36  		}
    37  	}
    38  	return false
    39  }
    40  
    41  // AppendSkipDuplicates appends source with elements with a condition
    42  // that those elemments must NOT already exist in the source
    43  func AppendSkipDuplicates(slice []string, elems ...string) (result []string) {
    44  	mark := make(map[string]bool, len(slice))
    45  	for _, val := range slice {
    46  		mark[val] = true
    47  	}
    48  	result = slice
    49  	for _, val := range elems {
    50  		if _, ok := mark[val]; !ok {
    51  			result = append(result, val)
    52  		}
    53  	}
    54  	return result
    55  }