JS Snippets: String: Difference between revisions
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==Reverse a String== | ==Reverse a String== | ||
<syntaxhighlight lang="typescript"> | <syntaxhighlight lang="typescript" line="1"> | ||
function reverse(str: string) { | function reverse(str: string) { | ||
return str.split("").reverse().join(""); | return str.split("").reverse().join(""); | ||
} | } | ||
</syntaxhighlight><syntaxhighlight lang="typescript"> | </syntaxhighlight><syntaxhighlight lang="typescript" line="1"> | ||
function reverse(str: string) { | function reverse(str: string) { | ||
let newStr = ""; | let newStr = ""; | ||
| Line 22: | Line 22: | ||
* ''Palindromes are words that are the same forward or backward.'' | * ''Palindromes are words that are the same forward or backward.'' | ||
<syntaxhighlight lang="typescript"> | <syntaxhighlight lang="typescript" line="1"> | ||
function isPalindrome(str: string) { | function isPalindrome(str: string) { | ||
return str === str.split("").reverse().join(""); | return str === str.split("").reverse().join(""); | ||
| Line 31: | Line 31: | ||
*''Anagrams are groups of words that can be spelled with the same letters.'' | *''Anagrams are groups of words that can be spelled with the same letters.'' | ||
<syntaxhighlight lang="typescript"> | <syntaxhighlight lang="typescript" line="1"> | ||
function isAnagram(str1: string, str2: string) { | function isAnagram(str1: string, str2: string) { | ||
if (str1.length !== str2.length) return false; | if (str1.length !== str2.length) return false; | ||
| Line 37: | Line 37: | ||
} | } | ||
</syntaxhighlight> | |||
== Is Anagram: Sentences in Array == | |||
* ''[https://scrimba.com/learn/interviewchallenges/challenge-find-anagrams-in-an-array-cv2mMrHK Scrimba challenge: Find anagram in array.]'' | |||
<syntaxhighlight lang="typescript" line="1" class="code-continue" start="1"> | |||
function sortPhrase(phrase) { | |||
return phrase.toLowerCase().split("").sort().join("").trim(""); | |||
} | |||
function isAnagramInArray(anagram, arr) { | |||
const anagramSorted = sortPhrase(anagram); | |||
return arr.filter((entry) => anagramSorted === sortPhrase(entry)); | |||
} | |||
</syntaxhighlight> | |||
<syntaxhighlight lang="javascript" class="code-continue"> | |||
const anagrams = [ | |||
"moz biblical torchbearers", | |||
"it's razorbill beachcomber", | |||
"och mcrobbie trailblazers", | |||
"bib chorizo cellarmaster", | |||
"thor scribble carbimazole", | |||
]; | |||
console.log(isAnagramInArray("Bob Ziroll Scrimba Teacher", anagrams)); | |||
</syntaxhighlight> | |||
<syntaxhighlight lang="shell-session" class="code-continue"> | |||
(3) ['moz biblical torchbearers', 'och mcrobbie trailblazers', 'thor scribble carbimazole'] | |||
</syntaxhighlight> | </syntaxhighlight> | ||
| Line 42: | Line 71: | ||
*''Write a function that will capitalize every word in a sentence.'' | *''Write a function that will capitalize every word in a sentence.'' | ||
<syntaxhighlight lang="typescript" class="code-continue"> | <syntaxhighlight lang="typescript" class="code-continue" line="1"> | ||
function capitalizeWord(word: string) { | function capitalizeWord(word: string) { | ||
return word[0].toUpperCase() + word.slice(1); | return word[0].toUpperCase() + word.slice(1); | ||
| Line 60: | Line 89: | ||
== Remove the Duplicate Chars == | == Remove the Duplicate Chars == | ||
<syntaxhighlight lang="typescript" class="code-continue"> | <syntaxhighlight lang="typescript" class="code-continue" line="1"> | ||
function removeDupeChars(chars: string) { | function removeDupeChars(chars: string) { | ||
let output = ""; | let output = ""; | ||
Latest revision as of 17:23, 11 March 2023
References
- Scrimba: JavaScript Interview Challenges
- MLT GitHub: JavaScript Homework Tasks
Reverse a String
function reverse(str: string) {
return str.split("").reverse().join("");
}
function reverse(str: string) {
let newStr = "";
for (let i = str.length - 1; i >= 0; i--) newStr += str[i];
return newStr;
}
Is Palindrome
- Palindromes are words that are the same forward or backward.
function isPalindrome(str: string) {
return str === str.split("").reverse().join("");
}
Is Anagram
- Anagrams are groups of words that can be spelled with the same letters.
function isAnagram(str1: string, str2: string) {
if (str1.length !== str2.length) return false;
return str1.split("").sort().join("") === str2.split("").sort().join("");
}
Is Anagram: Sentences in Array
function sortPhrase(phrase) {
return phrase.toLowerCase().split("").sort().join("").trim("");
}
function isAnagramInArray(anagram, arr) {
const anagramSorted = sortPhrase(anagram);
return arr.filter((entry) => anagramSorted === sortPhrase(entry));
}
const anagrams = [
"moz biblical torchbearers",
"it's razorbill beachcomber",
"och mcrobbie trailblazers",
"bib chorizo cellarmaster",
"thor scribble carbimazole",
];
console.log(isAnagramInArray("Bob Ziroll Scrimba Teacher", anagrams));
(3) ['moz biblical torchbearers', 'och mcrobbie trailblazers', 'thor scribble carbimazole']
Title Case
- Write a function that will capitalize every word in a sentence.
function capitalizeWord(word: string) {
return word[0].toUpperCase() + word.slice(1);
}
function toTitleCase(str: string) {
return str.split(" ").map(word => capitalizeWord(word)).join(" ");
}
console.log(toTitleCase("pumpkin pranced purposefully across the pond"));
Pumpkin Pranced Purposefully Across The Pond
Remove the Duplicate Chars
function removeDupeChars(chars: string) {
let output = "";
for (const char of chars)
if (!output.includes(char))
output += char;
return output;
}
console.log(removeDupeChars("pumpkin pranced purposefully across the pond"));
pumkin racedosflyth
