github.com/coltonfike/e2c@v21.1.0+incompatible/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 the target are in the source,
    20  // false otherwise.
    21  func ContainsAll(source, target []string) bool {
    22  	mark := make(map[string]bool, len(source))
    23  	for _, str := range source {
    24  		mark[str] = true
    25  	}
    26  	for _, str := range target {
    27  		if _, found := mark[str]; !found {
    28  			return false
    29  		}
    30  	}
    31  	return true
    32  }
    33  
    34  // ContainsAll returns true if all elements in the target are NOT in the source,
    35  // false otherwise.
    36  func NotContainsAll(source, target []string) bool {
    37  	return !ContainsAll(source, target)
    38  }
    39  
    40  // AppendSkipDuplicates appends source with elements with a condition
    41  // that those elemments must NOT already exist in the source
    42  func AppendSkipDuplicates(slice []string, elems ...string) (result []string) {
    43  	mark := make(map[string]bool, len(slice))
    44  	for _, val := range slice {
    45  		mark[val] = true
    46  	}
    47  	result = slice
    48  	for _, val := range elems {
    49  		if _, ok := mark[val]; !ok {
    50  			result = append(result, val)
    51  		}
    52  	}
    53  	return result
    54  }