bash shell 提供了两种一维数组,分别是 index array 和 associative array,常见的翻译是索引数组和关联数组。任何变量都可以用作数组,也就是说如果你使用了数组赋值的语法操作变量(name[subscript]=value),则变量默认会转换为索引数组。同时你也可以使用declare显示地定义数组。比如declare -a array。
To print the values of an associative array, use theechoorprintfcommand and reference all the array elements. For example: echo ${example_array[@]}Copy The at symbol (@) accesses all array elements and prints only the values. To print the associative array keys, use the following: echo $...
The method of printing all the keys and elements of an Associative array is mostly the same. To print all keys at once, use${!my_array[@]}which will retrieve all the keys in the associative array: echo "Keys: ${!my_array[@]}" If I want to print all the keys ofmyarray, then ...
Bash Associative Array (dictionaries, hash table, or key/value pair) When to use double quotes with Bash Arrays? Array Operations How to iterate over a Bash Array? (loop) How to get the Key/Value pair of a Bash Array? (Obtain Keys or Indices) How to get a Bash Array size? (Array ...
Using associative array in another loop for value comparison Now I can use the array in another for loop and compare the live values (e.g. from an API) to the expected values. Let's use the Salesforce Status API, which I've used in a recent article showinghow to extract...
In this example, we created an associative arraymyAssociativeArrayand added two elements with keys “fruit” and “vegetable”. We then accessed the element with the key “fruit”, resulting in the output ‘Apple’. Associative arrays can be more flexible than regular arrays, but they can also...
#!/usr/bin/env bash\n\nset -u\n\n#declare -A map=(one ONE two TWO)\narray=(one ONE two TWO)\ndeclare -A map=("${array[@]}")\n# Workaround with `eval`:\n#eval "declare -A map=(${array[@]@Q})"\n\necho "KEYS:"\nprintf \' %s\\n\' "${!map[@]}"\necho "...
In this example, we declare an associative array with the-Aoption. We then use a ‘for’ loop to iterate over the keys of the array (obtained using the!symbol before the array variable). Further Resources for Bash Array Loop Mastery ...
In general, there are two types of arrays: indexed and associative. Index arrays enable us to access elements using numerical indices starting from 0 (zero-based). On the other hand, we can access associative arrays using keys. In this tutorial, we’ll focus on indexed arrays since determini...
The above Bash script successfully prints the associative array “my_associative” (both the keys and values) using length expressions ${!my_associative[@]} and ${my_associative[@]} respectively. 2. Print an Array in Bash Using the “declare -p” Command The declare -p command in Bash di...