github.com/vescale/zgraph@v0.0.0-20230410094002-959c02d50f95/internal/slicesext/slices.go (about)

     1  // Copyright 2022 zGraph Authors. All rights reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package slicesext
    16  
    17  import (
    18  	"golang.org/x/exp/slices"
    19  )
    20  
    21  func ContainsFunc[S ~[]E, E any](s S, f func(E) bool) bool {
    22  	return slices.IndexFunc(s, f) >= 0
    23  }
    24  
    25  func FilterFunc[S ~[]E, E any](s S, f func(E) bool) S {
    26  	n := 0
    27  	for i, v := range s {
    28  		if f(v) {
    29  			s[n] = s[i]
    30  			n++
    31  		}
    32  	}
    33  	return s[:n]
    34  }
    35  
    36  func FindFunc[S ~[]E, E any](s S, f func(E) bool) (e E, ok bool) {
    37  	for _, v := range s {
    38  		if f(v) {
    39  			return v, true
    40  		}
    41  	}
    42  	return
    43  }