{"id":3985,"date":"2023-02-08T13:14:27","date_gmt":"2023-02-08T07:44:27","guid":{"rendered":"https:\/\/trysiteprice.com\/blog\/?p=3985"},"modified":"2024-05-01T17:21:36","modified_gmt":"2024-05-01T11:51:36","slug":"howto-bash-shell-split-string-into-array","status":"publish","type":"post","link":"https:\/\/trysiteprice.com\/blog\/howto-bash-shell-split-string-into-array\/","title":{"rendered":"HowTo: Bash Shell Split String Into Array"},"content":{"rendered":"<p>You can split a string into an array in bash using the <code>IFS<\/code> (Internal Field Separator) variable and parameter expansion.<\/p>\n<p>Here is an example of how to split a string into an array:<\/p>\n<div class=\"bg-black mb-4 rounded-md\">\n<div class=\"flex items-center relative text-gray-200 bg-gray-800 px-4 py-2 text-xs font-sans\"><\/div>\n<div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-bash\">string=<span class=\"hljs-string\">\"one two three four\"<\/span><br \/>\nIFS=<span class=\"hljs-string\">' '<\/span> <span class=\"hljs-built_in\">read<\/span> -ra arr &lt;&lt;&lt; <span class=\"hljs-string\">\"<span class=\"hljs-variable\">$string<\/span>\"<\/span><br \/>\n<span class=\"hljs-keyword\">for<\/span> i <span class=\"hljs-keyword\">in<\/span> <span class=\"hljs-string\">\"<span class=\"hljs-variable\">${arr[@]}<\/span>\"<\/span>; <span class=\"hljs-keyword\">do<\/span><br \/>\n  <span class=\"hljs-built_in\">echo<\/span> <span class=\"hljs-string\">\"<span class=\"hljs-variable\">$i<\/span>\"<\/span><br \/>\n<span class=\"hljs-keyword\">done<\/span><br \/>\n<\/code><\/div>\n<\/div>\n<p>In this example, the <code>IFS<\/code> variable is set to <code>' '<\/code>, which tells bash to use a space as the separator between elements in the string. The <code>read<\/code> command is used to split the string into elements of the <code>arr<\/code> array, using <code>-r<\/code> to prevent backslash escapes from being interpreted and <code>-a<\/code> to assign the elements to an array. The <code>&lt;&lt;&lt;<\/code> operator is used to pass the string as input to the <code>read<\/code> command. The <code>for<\/code> loop is used to iterate over the elements of the array and print each one.<\/p>\n<p>You can use a different separator by changing the value of <code>IFS<\/code>. For example, to split a string into an array based on a comma, you could use:<\/p>\n<div class=\"bg-black mb-4 rounded-md\">\n<div class=\"flex items-center relative text-gray-200 bg-gray-800 px-4 py-2 text-xs font-sans\"><\/div>\n<div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-bash\">string=<span class=\"hljs-string\">\"one,two,three,four\"<\/span><br \/>\nIFS=<span class=\"hljs-string\">','<\/span> <span class=\"hljs-built_in\">read<\/span> -ra arr &lt;&lt;&lt; <span class=\"hljs-string\">\"<span class=\"hljs-variable\">$string<\/span>\"<\/span><br \/>\n<span class=\"hljs-keyword\">for<\/span> i <span class=\"hljs-keyword\">in<\/span> <span class=\"hljs-string\">\"<span class=\"hljs-variable\">${arr[@]}<\/span>\"<\/span>; <span class=\"hljs-keyword\">do<\/span><br \/>\n  <span class=\"hljs-built_in\">echo<\/span> <span class=\"hljs-string\">\"<span class=\"hljs-variable\">$i<\/span>\"<\/span><br \/>\n<span class=\"hljs-keyword\">done<\/span><br \/>\n<\/code><\/div>\n<\/div>\n<p>Note: The <code>read<\/code> command can split strings into arrays, but it does not automatically preserve leading or trailing whitespace for each element in the array. To preserve whitespace, you can use a different method such as parameter expansion or <code>awk<\/code>.<\/p>\n<p>(<a href=\"https:\/\/tjc.org\/my-training\/315-2\/\">https:\/\/tjc.org\/<\/a>)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>You can split a string into an array in bash using the IFS (Internal Field Separator) variable and parameter expansion. Here is an example of how to split a string into an array: string=&#8221;one two three four&#8221; IFS=&#8217; &#8216; read -ra arr &lt;&lt;&lt; &#8220;$string&#8221; for i in &#8220;${arr[@]}&#8221;; do echo &#8220;$i&#8221; done In this example, &#8230; <a title=\"HowTo: Bash Shell Split String Into Array\" class=\"read-more\" href=\"https:\/\/trysiteprice.com\/blog\/howto-bash-shell-split-string-into-array\/\" aria-label=\"Read more about HowTo: Bash Shell Split String Into Array\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3985","post","type-post","status-publish","format-standard","hentry","category-best-tutorial"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>HowTo: Bash Shell Split String Into Array - TrySitePrice<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/trysiteprice.com\/blog\/howto-bash-shell-split-string-into-array\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"HowTo: Bash Shell Split String Into Array - TrySitePrice\" \/>\n<meta property=\"og:description\" content=\"You can split a string into an array in bash using the IFS (Internal Field Separator) variable and parameter expansion. Here is an example of how to split a string into an array: string=&quot;one two three four&quot; IFS=&#039; &#039; read -ra arr &lt;&lt;&lt; &quot;$string&quot; for i in &quot;${arr[@]}&quot;; do echo &quot;$i&quot; done In this example, ... 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Here is an example of how to split a string into an array: string=\"one two three four\" IFS=' ' read -ra arr &lt;&lt;&lt; \"$string\" for i in \"${arr[@]}\"; do echo \"$i\" done In this example, ... 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