Skip to content

manipulation

Abstract

This file contains the manipulation functions for generalized std::vector<T> template.
このファイルでは，一般化された std::vector<T> テンプレートを操作する関数を収録します．

Header file

namespace sstd{
    template<typename T> std::vector<T> rmEmpty   (const std::vector<T>& vec); // remove empty elements
    template<typename T> void           rmEmpty_ow(      std::vector<T>& vec); // remove empty elements overwrite

    template<typename T> std::vector<T> rmEmpty_l   (const std::vector<T>& vec); // remove empty elements from left side
    template<typename T> void           rmEmpty_l_ow(      std::vector<T>& vec); // remove empty elements from left side overwrite

    template<typename T> std::vector<T> rmEmpty_r   (const std::vector<T>& vec); // remove empty elements from right side
    template<typename T> void           rmEmpty_r_ow(      std::vector<T>& vec); // remove empty elements from right side overwrite

    // rmEmpty_ow(arg1, arg2, ...) of multiple vector arguments
    template<typename Head, typename... Tail> inline void rmEmpty_ow(Head&& head, Tail&&... tail);

    //---

    template<typename T> uint cntEmpty  (const std::vector<T>& vec); // count empty elements
    template<typename T> uint cntEmpty_l(const std::vector<T>& vec); // count empty elements from left side
    template<typename T> uint cntEmpty_r(const std::vector<T>& vec); // count empty elements from right side
}

Description

remove empty objects / 空のオブジェクトの削除

Function name Description
rmEmpty () returns the std::vector<T> type which is removed empty objects and .
空のオブジェクトを取り除いた std::vector<T> 型を返却します．
rmEmpty_ow() removes empty objects and overwrites the results to the input argument.
空のオブジェクトを取り除き，入力を上書きします．
rmEmpty_l () returns as the std::vector<T> type which is removed empty objects from left (head) side.
空のオブジェクトを左 (先頭) 側から取り除いた std::vector<T> 型を返却します．
rmEmpty_l_ow() removes empty objects from left (head) side and overwrites the results to the input argument.
空のオブジェクトを左 (先頭) 側から取り除き，入力を上書きします．
rmEmpty_r () returns as the std::vector<T> type which is removed empty objects from right (head) side.
空のオブジェクトを右 (末尾) 側から取り除いた std::vector<T> 型を返却します．
rmEmpty_r_ow() removes empty objects from right (head) side and overwrites the results to the input argument.
空のオブジェクトを右 (末尾) 側から取り除き，入力を上書きします．

remove objects based on a empty vector / 空ベクトルに基づくオブジェクトの削除

Function name Description
rmEmpty_ow(arg1, arg2, ...) removes objects and overwrites the results to the input arguments based on the empty elements of the first std::vector<T> argment.
第一引数の std::vector<T> 型が持つ空の要素に従って，オブジェクトを取り除き，入力を上書きします．

countup empty objects / 空のオブジェクトの数え上げ

Function name Description
cntEmpty returns the number of empty objects.
空のオブジェクトの数を返却します．
cntEmpty_l returns the number of empty objects counted from left (head) side.
左 (先頭) 側から数えた空のオブジェクトの数を返却します．
cntEmpty_r returns the number of empty objects counted from right (tail) side.
右 (末尾) 側から数えた空のオブジェクトの数を返却します．

Usage

remove empty objects / 空のオブジェクトの削除

  • main.cpp 
    #include <sstd/sstd.hpp>

int main(){
    printf("case1:\n");

    // case1_1
    std::vector<std::string> v1_1 = {"", "", "2", "3", "", "5", "", ""};
    sstd::printn( sstd::rmEmpty(v1_1) );

    // case1_2
    std::vector<std::string> v1_2 = {"", "", "2", "3", "", "5", "", ""};
    sstd::rmEmpty_ow(v1_2);
    sstd::printn( v1_2 );

    printf("\n");
    //---
    printf("case2:\n");

    // case2_1
    std::vector<std::string> v2_1 = {"", "", "2", "3", "", "5", "", ""};
    sstd::printn( sstd::rmEmpty_l(v2_1) );

    // case2_2
    std::vector<std::string> v2_2 = {"", "", "2", "3", "", "5", "", ""};
    sstd::rmEmpty_l_ow(v2_2);
    sstd::printn( v2_2 );

    printf("\n");
    //---
    printf("case3:\n");

    // case3_1
    std::vector<std::string> v3_1 = {"", "", "2", "3", "", "5", "", ""};
    sstd::printn( sstd::rmEmpty_r(v3_1) );

    // case3_2
    std::vector<std::string> v3_2 = {"", "", "2", "3", "", "5", "", ""};
    sstd::rmEmpty_r_ow(v3_2);
    sstd::printn( v3_2 );
}
  • Execution result 
    case1:
sstd::rmEmpty(v1_1) = ["2" "3" "5"]
v1_2 = ["2" "3" "5"]

case2:
sstd::rmEmpty_l(v2_1) = ["2" "3" "" "5" "" ""]
v2_2 = ["2" "3" "" "5" "" ""]

case3:
sstd::rmEmpty_r(v3_1) = ["" "" "2" "3" "" "5"]
v3_2 = ["" "" "2" "3" "" "5"]

remove objects based on a empty vector / 空ベクトルに基づくオブジェクトの削除

  • main.cpp 
    #include <sstd/sstd.hpp>

int main(){
    std::vector<std::string> v1 = {  "",   "", "2a", "3a",   "", "5a",   "",   ""};
    std::vector<std::string> v2 = {"0b", "1b", "2b", "3b", "4b", "5b", "6b", "7b"};
    std::vector<std::string> v3 = {"0c", "1c", "2c", "3c", "4c", "5c", "6c", "7c"};
    sstd::rmEmpty_ow(v1, v2, v3);
    sstd::printn( v1 );
    sstd::printn( v2 );
    sstd::printn( v3 );
}
  • Execution result 
    v1 = ["2a" "3a" "5a"]
v2 = ["2b" "3b" "5b"]
v3 = ["2c" "3c" "5c"]

countup empty objects / 空のオブジェクトの数え上げ

  • main.cpp 
    #include <sstd/sstd.hpp>

int main(){
    std::vector<std::string> v = {"", "", "2", "3", "", "5", "", "", ""};

    sstd::printn( sstd::cntEmpty  (v) );
    sstd::printn( sstd::cntEmpty_l(v) );
    sstd::printn( sstd::cntEmpty_r(v) );
}
  • Execution result 
    sstd::cntEmpty (v) = 6
sstd::cntEmpty_l(v) = 2
sstd::cntEmpty_r(v) = 3

Appendix

Implementation