我正在尝试运行一个可以做猪拉丁的功能。我陷入了第一步。
当我将输入参数设置为'eat'=>时，我希望我的代码返回字符串加'ay'。请参见下面的代码以及if语句。
相反，当我运行我的代码时，它返回未定义。我希望它返回“进餐”。为什么？
if (arr1[i][0] == arr2[j][0] && arr1[i][1] == arr2[j][1])
答案 0 :(得分：2)
您有<!DOCTYPE html>
<html>
<head>
<meta charset='utf-8' />
<title>Alternative for document.getElementById</title>
<script>
/*
I had made a slight error with the selector - it should be input.button1
rather than button.button1
The action invoked by the button also needed to be changed - it now
navigates up the DOM tree to it's parent then to the parent's sibling
*/
document.addEventListener('DOMContentLoaded',()=>{
Array.prototype.slice.call( document.querySelectorAll( 'div.overlay, input.button1' ) ).forEach( function(node){
node.addEventListener('click', function(e){
e.preventDefault();
switch( this.tagName ){
case 'INPUT':
this.parentNode.nextElementSibling.style.display='block';
break;
case 'DIV':
this.style.display='none';
break;
}
});
});
});
</script>
<style>
html *{box-sizing:border-box;}
#wrapper{width:100%;height:100vh;margin:0;padding:0;}
#wrapper > a.annons-tb{ padding:1rem;height:5rem;width:100%;display:inline-block; }
#wrapper > div.overlay{ background:whitesmoke;border:1px dotted rgba(100,100,100,0.25);padding:1rem;margin:1rem auto;display:none }
</style>
</head>
<body>
<div id='wrapper'>
<?php
/*
To emulate the db call
a static array can be used
*/
$rs=array(
array(
'titleGallery'=>'Mega Gallery 1',
'descGallery'=>'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed orci ipsum, commodo pulvinar rutrum non, congue ut justo. Phasellus nec scelerisque diam, ut cursus felis.',
'imgFullNameGallery'=>'Gallery 1',
'prisGallery'=>'abc',
'namnGallery'=>'bob',
'emailGallery'=>'gal1@example.com',
'nummerGallery'=>'0141 353 3780'
),
array(
'titleGallery'=>'Super Gallery 2',
'descGallery'=>'urabitur tristique libero non lorem blandit eleifend. Sed gravida ut purus vitae dignissim. Aenean pellentesque, diam ac euismod eleifend, lorem mauris dapibus lorem, id fermentum augue nisi at nisl.',
'imgFullNameGallery'=>'Gallery 2',
'prisGallery'=>'def',
'namnGallery'=>'rita',
'emailGallery'=>'gal2@example.com',
'nummerGallery'=>'0131 551 7488'
),
array(
'titleGallery'=>'Awesome Gallery 3',
'descGallery'=>'Morbi ultrices nisl elementum augue sagittis porttitor. Nulla posuere molestie quam posuere tempus. Sed convallis metus mi, quis faucibus est lobortis sed.',
'imgFullNameGallery'=>'Gallery 3',
'prisGallery'=>'ghi',
'namnGallery'=>'sue',
'emailGallery'=>'gal3@example.com',
'nummerGallery'=>'01307 462 059'
)
);
/*
for the static array a foreach rather than while loop
but essentially the same...
I prefer use printf to constantly escaping out from the html to
include the variable but again essentially the same as the original
except for the lack of ID attributes
*/
foreach( $rs as $row ){
printf('
<a class="annons-tb">
<div style="background-image: url(img/gallery/%s);"></div>
<h3>%s</h3>
<p>%s</p>
<input type="button" class="button1" name="id" value="Visa Mer Info">
</a>
<div class="overlay">
<div class="text">
<img src="data:img/gallery/jpeg;base64,%s" width="250" height="250" />
<h3>%s</h3>
<p1>Beskrivning: %s</p1>
<div class="p-delen">
<br />
<p>Pris: %s</p>
<p>Namn: %s</p>
<p>Mail: %s</p>
<p>TelefonNummer: %s</p>
</div>
</div>
</div>',
$row['imgFullNameGallery'],
$row['titleGallery'],
$row['descGallery'],
$row['imgFullNameGallery'],
$row['titleGallery'],
$row['descGallery'],
$row['prisGallery'],
$row['namnGallery'],
$row['emailGallery'],
$row['nummerGallery']
);
}
?>
</div>
</body>
</html>
错误的论点。语法为includes()，因此应为：
container.includes(element)答案 1 :(得分：1)
JavaScript本身提供了“ includes”和“ charAt”功能。可以使用str.charAt（0）代替将字符串拆分为字符数组并找到第一个元素。并包括搜索数组的函数，如果有任何元素匹配，则返回true。
const pigify = (str) => {
if(['a', 'e', 'i', 'o', 'u'].includes(str.charAt(0))) {
return str+'ay';
}