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[Bash] Bash function, array parameters, str replace 등

ITWeb/개발일반 2020. 4. 20. 11:18

bash script 에서 function 사용은 호출 위치 보다 위에 function 선언이 되어 있어야 합니다.

#!/usr/bin/env bash

function 함수명() {
...
}

## 예제

#!/usr/bin/env bash

function helloWorld() {
  echo 'Hello World!!'
}

helloWorld

function 에 다중 array paramters 를 넘기는 예제는 아래와 같습니다.

#!/usr/bin/env bash

function deployElasticStack() {
  local instances=($1)
  local targets=($2)

  for instance in ${instances[@]}
  do

    local hostIpUser=($(echo $instance | tr ":" "\n"))

    for target in ${targets[@]}
    do
...중략...
    done
  done
}

selfHost=$(hostname -I|cut -f1 -d ' ')

instanceArr=("xxx.xxx.xxx.xxx:ubuntu" "xxx.xxx.xxx.xxx:ec2-user" "xxx.xxx.xxx.xxx:ubuntu")
metricbeatArr=("xxx.xxx.xxx.xxx" "xxx.xxx.xxx.xxx" "xxx.xxx.xxx.xxx")

deployElasticStack "${instanceArr[*]}" "${metricbeatArr[*]}" "$selfHost" "metricbeat"

해당 장비의 IP 정보를 가져 오는 예제는 아래와 같습니다.

$ hostname -I

$ hostname -I|cut -f1 -d ' '

$ ip route get 8.8.8.8 | sed -n '/src/{s/.*src *\([^ ]*\).*/\1/p;q}'

file 내 특정 문자열을 치환 하는 예제는 아래와 같습니다.

$ sed -i "s/소스문자열/치환문자열/g" configuration.yml

# osx 에서는 아래와 같이 합니다.
$ sed -i "" "s/소스문자열/치환문자열/g" configuration.yml

c++ string replace

ITWeb/개발일반 2013. 2. 1. 13:08

[Reference URL]
http://www.cplusplus.com

The below code is valid on my machine.

str_vector_t sReplVector;

str_vector_const_iterator_t sIterator;

std::string findStr = "";

int32_t pos = 0;

for ( sIterator = sQueryVector1.begin(); sIterator != sQueryVector1.end(); sIterator++ ) {

findStr = sIterator->c_str();

pos = findStr.find("INSERT INTO Tbl1");

LOGDEBUG("[ASIS][sQueryVector1][%s]", sIterator->c_str());

if ( pos > 0 ) {

findStr.replace(pos, 17, "INSERT INTO Tbl2");

sReplVector.push_back(findStr);

LOGDEBUG("[TOBE][sQueryVector1][%s]", findStr.c_str());

}

General example by cpluscplus.com
http://www.cplusplus.com/reference/string/string/replace/

// replacing in a string

#include <iostream>
#include <string>

int main ()
{
  std::string base="this is a test string.";
  std::string str2="n example";
  std::string str3="sample phrase";
  std::string str4="useful.";

  // replace signatures used in the same order as described above:

  // Using positions:                 0123456789*123456789*12345
  std::string str=base;           // "this is a test string."
  str.replace(9,5,str2);          // "this is an example string." (1)
  str.replace(19,6,str3,7,6);     // "this is an example phrase." (2)
  str.replace(8,10,"just a");     // "this is just a phrase."     (3)
  str.replace(8,6,"a shorty",7);  // "this is a short phrase."    (4)
  str.replace(22,1,3,'!');        // "this is a short phrase!!!"  (5)

  // Using iterators:                                               0123456789*123456789*
  str.replace(str.begin(),str.end()-3,str3);                    // "sample phrase!!!"      (1)
  str.replace(str.begin(),str.begin()+6,"replace");             // "replace phrase!!!"     (3)
  str.replace(str.begin()+8,str.begin()+14,"is coolness",7);    // "replace is cool!!!"    (4)
  str.replace(str.begin()+12,str.end()-4,4,'o');                // "replace is cooool!!!"  (5)
  str.replace(str.begin()+11,str.end(),str4.begin(),str4.end());// "replace is useful."    (6)
  std::cout << str << '\n';
  return 0;
}

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jjeong

'replace'에 해당되는 글 2건

[Bash] Bash function, array parameters, str replace 등

c++ string replace

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