A list of strings or array or sequence of elements can be iterated by using for loop in bash. How you can iterate the list of strings in Bash by for loop is shown in this tutorial by using various bash script examples. If you are novice is bash programming then you can read the ...
就像是: for databaseName in listOfNames then # Do something endarrays bash shell unix 答案你可以像这样使用它: ## declare an array variable declare -a arr=("element1" "element2" "element3") ## now loop through the above array for i in "${arr[@]}" do echo "$i" # or do w...
Some useful BASH for loop examples has been mentioned in this article. Syntax of for loop: # loop through a list for value in list do commands done # loop specified values for value in file1 file2 file3 do commands done # loop through strings resulting from a command for value in $(...
Over Strings Now let's look at standard Bash for Loop over Strings. For instance, in the below example, the loop will repeat each item in the list of strings and variable element fixed to the current item. for element in Gold Silver Diamond Platinum do echo "Element: $element" Done Over...
通常,<condition list>是一个单独的命令,通常是test或者它的同义词,,或者,在bash中,[[。在清单 3-1 的[中,test的-z操作数检查是否输入了一个名字。 清单3-1 。读取并检查输入 read name if [[ -z $name ]] then echo "No name entered" >&2 exit 1 ## Set a failed return code fi 使用else...
How to use a for loop in bash scripting? What are the basic syntax elements of a bash for loop? Can you provide an example of iterating through a list with a for loop in bash? This type of for loop is characterized by counting. The range is specified by a beginning (#1) and endin...
String manipulation can also be performed in loops in Bash. For example, to loop through a list of files with ".txt" extension and rename them by appending ".bak" to filename, following code can be used ? for file in *.txt do ...
Variable names with a dollar sign can also be used inside other strings in order to insert the value of the variable into the string: echo"I went to school in$the_empire_state." ## I went to school in New York. When writing a Bash script, the script gives you a few variables for...
Iteration is the process of repeating a set of operations for each item in a collection. In the context of a Bash ‘foreach’ loop, the collection could be a list of strings, numbers, or array elements. Here’s an example of a basic Bash ‘for’ loop that prints the numbers 1 to ...
Loop on Directories. Ask Question Asked 11 years, 9 months ago. Modified 11 years, 9 months ago. Viewed 60k times 36 5. Quick Background: $ ls src Loop through an array in JavaScript. 3291. How to concatenate string variables in Bash. 1998. Loop through an array of strings in Bash?