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[英]Finding longest word in a string javascript code that is not working on the last wordd
[英]Finding the longest word in a string is not working
我應該在字符串中找到最長的單詞,這是我到目前為止提出的代碼。 不幸的是,這似乎不起作用,我的問題是為什么?
function findLongestWordLength(str) {
str.split("");
let longest = 1;
for(let i = 0; i < str.length; i++){
if (str[i].length > longest){
longest = str[i].length;
}
}
return longest;
}
如果我沒有正確理解,則有兩個主要問題:
1)您沒有在任何地方存儲String.split()的結果。
2)如果需要拆分不同的單詞,則需要按space
拆分
我還將以longest = 0
而不是1
function findLongestWordLength(str) { str = str.split(" "); let longest = 0; for (let i = 0; i < str.length; i++) { if (str[i].length > longest) longest = str[i].length; } return longest; } console.log(findLongestWordLength("Hello World")); console.log(findLongestWordLength("")); console.log(findLongestWordLength("123 1234567 12345"));
.as-console {background-color:black !important; color:lime;} .as-console-wrapper {max-height:100% !important; top:0;}
另外,您可以使用Array.map()將每個單詞map
到其長度,然后在Math.max()上spread
此長度數組以得到所需的結果:
function findLongestWordLength(str) { let wordLengths = str.split(" ").map(word => word.length); return Math.max(...wordLengths); } console.log(findLongestWordLength("Hello World")); console.log(findLongestWordLength("")); console.log(findLongestWordLength("123 1234567 12345"));
.as-console {background-color:black !important; color:lime;} .as-console-wrapper {max-height:100% !important; top:0;}
問題是第二行需要更改為str = str.split(" ");
由於字符串是不可變的,因此無法更改,因此需要重新分配。
function findLongestWordLength(str) { str = str.split(" "); let longest = 1; console.log(str); for(let i = 0; i < str.length; i++){ if (str[i].length > longest){ longest = str[i].length; } } return longest; } var result = findLongestWordLength("Joan Ala Valeron") console.log(result);
您需要用" "
分隔字符串。 然后遍歷單詞並返回最大的長度。
function findLongestWordLength(str) { const words = str.split(" "); return words.reduce( (max, word) => (word.length > max ? word.length : max), 0 ); } console.log(findLongestWordLength("hello world"));
由於使用reduce
因此該解決方案更短,更清潔。
您可以嘗試此代碼。
function findLongestWordLength(str) {
var strSplit = str.split(' ');
var longest = 0;
for(var i = 0; i < strSplit.length; i++){
if(strSplit[i].length > longest){
longest = strSplit[i].length;
}
}
return longest;
}
findLongestWordLength("The quick brown fox jumped over the lazy dog");
function findLongestWordLength(str) {
var otherStr = str.split(" ");
let longest = 0;
for(let i = 1; i < otherStr.length; i++){
if (otherStr[i].length > otherStr[longest].length){
longest = i;
}
}
return otherStr[longest];
}
findLongestWordLength("This is the String Data")
這是行不通的,因為您正在遍歷長度為1的字符串中的每個字符。您沒有比較單詞的長度。
function findLongestWordLength(str) {
let words = str.split(" "); // Delemiter to separate words from sentence is space
let longest = 1;
for(let i = 0; i < words.length; i++){
if (words[i].length > longest){
longest = words[i].length;
}
}
return longest;
}
function spacer(m) { var space = ""; for(var inst = 0; inst < m;inst++) space += "\\n"; console.log(space); } function findLongestWordLength(str) { //Checking that what you are sending is a string... if(typeof str !== "string") throw "This function requires you to pass in a string..."; //Ghetto Class...lol function CreateWord(word) { this.word = word; this.length = word.length; } // Getting all the words...but taking out the words that are "" var AllWords = str.split(" ").filter(word => word != ""), // This is how many words you have that are not "" wordCount = AllWords.length, // Defaulting the longest word to the first word... longest = new CreateWord(AllWords[0]); // if we only have one, we return the one word... if(wordCount === 1) return longest; for(let i = 0; i < wordCount; i++){ if (AllWords[i].length > longest.length){ longest = new CreateWord(AllWords[i]); } } return longest; } //Simple Test... var Implementation = findLongestWordLength("ONE TWO THREE FOUR TESTINGLONGWORD"); console.log(Implementation); console.log(`Word: ${Implementation.word}`); console.log(`Length: ${Implementation.length}`); spacer(3); //Single word... var Implementation2 = findLongestWordLength("Only-One-Word"); console.log(Implementation2); console.log(`Word: ${Implementation2.word}`); console.log(`Length: ${Implementation2.length}`); spacer(3); //Exception...because I dont want want you to misUse this function.... var Implementation3 = findLongestWordLength(null); console.log(Implementation3); console.log(`Word: ${Implementation3.word}`); console.log(`Length: ${Implementation3.length}`);
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