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94 lines
2.2 KiB
Markdown
94 lines
2.2 KiB
Markdown
---
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id: ac6993d51946422351508a41
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title: Truncate a String
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challengeType: 1
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forumTopicId: 16089
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dashedName: truncate-a-string
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---
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# --description--
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Truncate a string (first argument) if it is longer than the given maximum string length (second argument). Return the truncated string with a `...` ending.
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# --hints--
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`truncateString("A-tisket a-tasket A green and yellow basket", 8)` should return the string `A-tisket...`.
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```js
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assert.strictEqual(
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truncateString('A-tisket a-tasket A green and yellow basket', 8),
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'A-tisket...'
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);
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```
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`truncateString("Peter Piper picked a peck of pickled peppers", 11)` should return the string `Peter Piper...`.
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```js
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assert.strictEqual(
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truncateString('Peter Piper picked a peck of pickled peppers', 11),
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'Peter Piper...'
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);
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```
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`truncateString("A-tisket a-tasket A green and yellow basket", "A-tisket a-tasket A green and yellow basket".length)` should return the string `A-tisket a-tasket A green and yellow basket`.
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```js
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assert.strictEqual(
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truncateString(
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'A-tisket a-tasket A green and yellow basket',
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'A-tisket a-tasket A green and yellow basket'.length
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),
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'A-tisket a-tasket A green and yellow basket'
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);
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```
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`truncateString("A-tisket a-tasket A green and yellow basket", "A-tisket a-tasket A green and yellow basket".length + 2)` should return the string `A-tisket a-tasket A green and yellow basket`.
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```js
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assert.strictEqual(
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truncateString(
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'A-tisket a-tasket A green and yellow basket',
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'A-tisket a-tasket A green and yellow basket'.length + 2
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),
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'A-tisket a-tasket A green and yellow basket'
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);
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```
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`truncateString("A-", 1)` should return the string `A...`.
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```js
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assert.strictEqual(truncateString('A-', 1), 'A...');
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```
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`truncateString("Absolutely Longer", 2)` should return the string `Ab...`.
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```js
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assert.strictEqual(truncateString('Absolutely Longer', 2), 'Ab...');
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```
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# --seed--
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## --seed-contents--
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```js
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function truncateString(str, num) {
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return str;
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}
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truncateString('A-tisket a-tasket A green and yellow basket', 8);
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```
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# --solutions--
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```js
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function truncateString(str, num) {
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if (num >= str.length) {
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return str;
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}
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return str.slice(0, num) + '...';
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}
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truncateString('A-tisket a-tasket A green and yellow basket', 8);
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```
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