题解 | #shell/bash去掉不需要的单词#

1.正则匹配使用

#!/usr/bin/env bash

function solution_1() {
    local arr=""
    while read line; do
        arr=(${line})
        for ele in ${arr[@]}; do
            if [[ "${ele}" =~ B || "${ele}" =~ b ]]; then
                continue
            fi
            echo "${ele} "
        done
    done < nowcoder.txt
}

function solution_2() {
    local arr=""
    while read line; do
        arr=(${line})
        for ele in ${arr[@]}; do
            if [[ "${ele}" =~ B|b ]]; then
                continue
            fi
            echo "${ele} "
        done
    done < nowcoder.txt
}

function solution_4() {
    sed '/B\|b/d' nowcoder.txt
}

function solution_5() {
    #awk '{ for(i=0; i<NF; i++) if($i ~! /b/) print $i }' nowcoder.txt
    #awk '/\+[^b\+]\+/{print $1}' nowcoder.txt
    :
}

function solution_999() {
    while read line; do
        my_array=("${my_array[@]}" $line)
    done
    declare -a pattern=(${my_array[@]/*[B|b]*/})
    echo ${pattern[@]}
}

solution_1