resulting in an empty output on the last iteration. To avoid this, ensure that your loop condition isindex -lt ${#numbers[@]}(less than the length of the array), notindex -le ${#numbers[@]}(less than or equal to the length of the array). ...
bash test30.sh 1 2 10 The name of this script is "test.sh". The name of this script is "test.sh". Parameter #1 is 1 Parameter #2 is 2 --- All the command-line parameters are: 1 2 10 This script needs at least 10 command-line arguments! 基本运算符 算数运算符 vim test.sh ...
How to do a do-while loop in bash? How to create an infinite loop in bash? How to find if a number is odd or even in bash? How to iterate over a bash array? How to loop over each line of a file? How to iterate over a list of files? How to use numbers with leading zeros...
除了上面的./example.sh的方法,另一种运行bash script的方式是bash example.sh。 变量 如果仅仅是想要运行一连串的命令,似乎我手打也行啊,没必要专门写个bash script。这时候,就需要变量了。有了变量,他就可以干很多事了。 变量赋值和其他很多语言很相似(比如python),是一种dynamical typing的方式赋值,而想要调用变...
# Usage: remove_array_dups "array" declare -A tmp_array for i in "$@"; do [[ $i ]] && IFS=" " tmp_array["${i:- }"]=1 done printf '%s\n' "${!tmp_array[@]}" } 用法示例: $ remove_array_dups 1 1 2 2 3 3 3 3 3 4 4 4 4 4 5 5 5 5 5 5 ...
6.循环loop 6.1 while do done, until do done (不定循环) 6.2 for...in...do...done (固定循环) 6.5 for...do...done 的数值处理 7.shell script的追踪与debug 四、补充 1.打印进度条 2.文件描述符(参考第一章18小节) 3.进程检测
printf '%s\n' "${!tmp_array[@]}" } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 用法示例: $ remove_array_dups 1 1 2 2 3 3 3 3 3 4 4 4 4 4 5 5 5 5 5 5 1 2 3 4 5 $ arr=(red red green blue blue) $ remove_array_dups "${arr[@]}" ...
Linux Bash Script loop shell 编程之流程控制 for 循环、while 循环和 until 循环 for var in item1 item2 ... itemN do command1 command2 ... commandN done 1. 2. 3. 4. 5. 6. 7. for var in item1 item2 ... itemN; do command1; command2… done; ...
Here’s an example of a ‘foreach’ loop in a larger script: # Define an array of filenamesfiles=("file1.txt""file2.txt""file3.txt")# Iterate over the array and perform operations on each fileforfilein"${files[@]}";do# Print the filenameecho"Processing$file"# Perform some oper...
They can often be found without executing the shell script. The most common syntax errors include: Improper use of square brackets or parentheses in a Bash If Statement Incorrect syntax when using a Bash Loop or a Bash Array Incorrect use of a compound command when defining a Bash Function ...