Compare length of two strings: Difference between revisions
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=={{header|JavaScript}}== |
=={{header|JavaScript}}== |
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<lang JavaScript>// file stringlensort.js |
<lang JavaScript>// file stringlensort.js |
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/** |
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* Compare and report strings lengths. |
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* |
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* @param {Element} input - a TextArea DOM element with input |
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* @param {Element} output - a TextArea DOM element for output |
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*/ |
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function compareStringsLength(input, output) { |
function compareStringsLength(input, output) { |
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// Safe defaults. |
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// |
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output.value = ""; |
output.value = ""; |
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let output_lines = []; |
let output_lines = []; |
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// Split input into an array of lines. |
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// |
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let strings = input.value.split(/\r\n|\r|\n/g); |
let strings = input.value.split(/\r\n|\r|\n/g); |
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// Is strings array empty? |
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// |
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if (strings && strings.length > 0) { |
if (strings && strings.length > 0) { |
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// Remove leading and trailing spaces. |
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// |
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for (let i = 0; i < strings.length; i++) |
for (let i = 0; i < strings.length; i++) |
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strings[i] = strings[i].trim(); |
strings[i] = strings[i].trim(); |
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// Sort by lengths. |
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// |
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strings.sort((a, b) => a.length - b.length); |
strings.sort((a, b) => a.length - b.length); |
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// Remove empty strings. |
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// |
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while (strings[0] == "") |
while (strings[0] == "") |
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strings.shift(); |
strings.shift(); |
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// Check if any strings remain. |
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// |
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if (strings && strings.length > 0) { |
if (strings && strings.length > 0) { |
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// Get min and max lengths of strings. |
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// |
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const min = strings[0].length; |
const min = strings[0].length; |
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const max = strings[strings.length - 1].length; |
const max = strings[strings.length - 1].length; |
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// Build output verses - longest strings first. |
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// |
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for (let i = strings.length - 1; i >= 0; i--) { |
for (let i = strings.length - 1; i >= 0; i--) { |
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let length = strings[i].length; |
let length = strings[i].length; |
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output_lines.push(`"${strings[i]}" has length ${length} and ${predicate}\n`); |
output_lines.push(`"${strings[i]}" has length ${length} and ${predicate}\n`); |
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} |
} |
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// Send all lines from output_lines array to an TextArea control. |
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// |
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output.value = output_lines.join(''); |
output.value = output_lines.join(''); |
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} |
} |
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document.getElementById("input").value = "abcd\n123456789\nabcdef\n1234567"; |
document.getElementById("input").value = "abcd\n123456789\nabcdef\n1234567"; |
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compareStringsLength(input, output); |
compareStringsLength(input, output); |
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</lang> |
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<lang html><html> |
<lang html><html> |
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