如何确定哪种方法运行得更快?很难在Ruby文档中阅读Benchmark并实际实现它.谢谢
def count_between(list_of_integers, lower_bound, upper_bound)
count = 0
list_of_integers.each do |x|
(x >= lower_bound && x <= upper_bound) ? count += 1 : next
end
count
end
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要么
def count_between(list_of_integers, lower_bound, upper_bound)
count = 0
list_of_integers.each do |x|
count += 1 if x.between?(lower_bound, upper_bound)
end
count
end
Run Code Online (Sandbox Code Playgroud) 我正在尝试编写代码来确定字符串中字母的连续频率.
例如:
"aabbcbb" => ["a",2],["b",2],["c", 1], ["b", 2]
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我的代码给了我第一个字母频率,但没有继续下一个.
def encrypt(str)
array = []
count = 0
str.each_char do |letter|
if array.empty?
array << letter
count += 1
elsif array.last == letter
count += 1
else
return [array, count]
array = []
end
end
end
Run Code Online (Sandbox Code Playgroud) 有点卡在这里.我在我的网页上添加了一个非常简单的谷歌地图,并使用基本的JavaScript API来实现这一点.Chrome中的一切都运行良好,但有了Internet Explorer,它偶尔会起作用.出现的错误是:
SCRIPT5022:InvalidValueError:initMap不是函数js,第102行字符390
错误是指对谷歌地图API的调用,而不是我的js.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
<title>Under Construction</title>
<link rel="shortcut icon" href="images/betterlogo.ico" type="image/x-icon">
<!-- Bootstrap -->
<link href="css/bootstrap.min.css" rel="stylesheet">
<link rel="stylesheet" href="css/animate.css">
<link rel="stylesheet" href="css/thumbnails.css">
<link rel="stylesheet" href="css/main.css">
<!-- JS -->
<!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries …Run Code Online (Sandbox Code Playgroud) 使用Bootstrap 3,我正在处理的站点具有几个导航栏,一个带有主页,注册等的顶部,另一个带有搜索栏选项,然后是另一个主要类别(navbar3),它们是下拉菜单。问题出在navbar3。我需要下拉菜单占用视图宽度的整个宽度,但不能超过980px。现在,单击下拉菜单时,弹出窗口以其受尊敬的col-xs-2从其父div的开头开始。我需要弹出控件从该行的开头开始(就像鞋类当前正在做的那样),并将整个宽度扩展到980px。因此,如果您单击服装,我希望该下拉菜单在鞋类下拉菜单开始的同一点开始。我已经排除了一些对解决方案没有影响的css。而且品牌没有弹出式广告
#backgroundcategory {
margin: 0 auto;
height: 37px;
}
.maxwidth {
max-width: 980px;
}
.categorydropadjust {
width: 20%;
}
.categoryheaders {
padding-left: 0;
margin: 0 auto;
font-weight: 700;
font-size: 20px;
height: 37px;
}
.vcenter {
display: flex;
align-items: center;
}
.centercat {
margin: 0 auto;
}
.dropdowncat:hover {
cursor: pointer;
}Run Code Online (Sandbox Code Playgroud)
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<div id="backgroundcategory">
<div class="container-fluid maxwidth">
<div class="row">
<div class="col-xs-2 categorydropadjust">
<div class="dropdown dropdowncat">
<div class="dropdown-toggle categoryheaders vcenter" id="footwear" data-toggle="dropdown" aria-haspopup="true" aria-expanded="true"> …Run Code Online (Sandbox Code Playgroud)