Example of accessing array elements in bash shell${ 之后或 } 之前不能有任何空格。你不能像 ${ array[n] } 那样使用它。 一次访问所有数组元素 假设你要打印数组的所有元素。 你可以一一使用 echo ${array[n]} 但这确实没有必要。有一个更好更简单的方法: ${array[*]} 这将为你提供所有数组元素
Bash arrays allow you to store multiple values in a single variable. This is particularly useful when you need to group related data together. Let’s dive into the basics of creating and accessing elements in a Bash array of strings. Creating a Bash Array In Bash, you can create an array...
When to use double quotes with Bash Arrays? Array Operations How to iterate over a Bash Array? (loop) How to get the Key/Value pair of a Bash Array? (Obtain Keys or Indices) How to get a Bash Array size? (Array length) How to remove a key from a Bash Array or delete the full...
#!/bin/bash # 方法一:直接赋值 array1=("value1" "value2" "value3") # 方法二:使用索引赋值 array2[0]="value1" array2[1]="value2" array2[2]="value3" # 方法三:从字符串分割赋值 string="value4 value5 value6" array3=($string) # 方法四:使用read命令赋值 echo "Enter values separa...
In every programming language, the term array means a collection of items that holds some data. The data would be in an indexed manner.
In the next section, we’ll take a look at more complex uses of loops with arrays in Bash. Advanced Techniques: Bash Array Looping As you become more comfortable with Bash scripting, you’ll find that there are more complex scenarios where you need to loop through arrays. This might includ...
本例中,所有元素都是数字,但参数并不一定是数字,Bash 中的数组可以容纳数字和字符串,比如myArray=(1 2 "three" 4 "five")就是个有效的表达式。就像 Bash 中其它的变量一样,确保赋值符号两边没有空格。否则 Bash 将会把变量名当作程序来执行,把=当作程序的第一个参数。
Conclusion The length of Bash arrays helps to iterate over the elements. Prefixing the # symbol to that array variable returns the array size. There are different approaches to get the array length and we also learned how they differ.
declare -rA example_arrayCopy After initializing the array, modifying or adding elements is impossible. Use read-only associative arrays to store unchangingkey-value pairs. Print Keys and Values To print the values of an associative array, use theechoorprintfcommand and reference all the array ele...
or any external resources. With the-roption andwhile loop, it accesses the file contents and reads them into the specified array using the syntax,array+=($file_name). Here, the+=is the “compound assignment operator” for arrays in Bash which appends elements to the end of the “array”...