我正在尝试做一些基于句子中字符数量的动态规划。英语字母表中哪个字母在屏幕上占像素最多?
当前回答
这取决于字体。例如，交叉0所占的空间要比普通0大得多。
但如果要猜的话，我会选X或B。
其他回答
这段代码将获取数组中所有字符的宽度:
const alphabet = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"; var widths = []; var div = document.createElement('div'); div.style.float = 'left'; document.body.appendChild(div); var highestObservedWidth = 0; // widest characters (not just one) var answer = ''; for (var i = 0; i < alphabet.length; i++) { div.innerText = alphabet[i]; var computedWidthString = window.getComputedStyle(div, null).getPropertyValue("width"); var computedWidth = parseFloat(computedWidthString.slice(0, -2)); // console.log(typeof(computedWidth)); widths[i] = computedWidth; if(highestObservedWidth == computedWidth) { answer = answer + ', ' + div.innerText; } if(highestObservedWidth < computedWidth) { highestObservedWidth = computedWidth; answer = div.innerText; } } if (answer.length == 1) { div.innerHTML = ' Winner: ' + answer + '.'; } else { div.innerHTML = ' Winners: ' + answer + '.'; } div.innerHTML = div.innerHTML ; // console.log(widths); // console.log(widths.sort((a, b) => a - b));
嗯，让我想想:
啊
咔嚓咔嚓
cccccccccccccccccccccccccccccccccccccccc
DDDD
eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
ffffffffffffffffffffffffffffffffffffffff
gggggggggggggggggggggggggggggggggggggggg
hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
唔��
mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn
呜
购买力平价
qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq
rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr
ssssssssssssssssssssssssssssssssssssssss
啧��
uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu
vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
wwwwww
xxxx
yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
啊
BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD
EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
JJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJ
KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK
LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
啊
公私合营
QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ
RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS
TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT
UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU
VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV
www
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY
ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ
W获胜。
当然，这是一个愚蠢的经验实验。哪个字母最宽没有唯一的答案。这取决于字体。所以你必须做一个类似的经验实验来找出你所处环境的答案。但事实是，大多数字体遵循相同的惯例，大写W将是最宽的。
主旨与这些字符宽度的比率形式(W = 100)在这里捕获使用特定的示例字体:
https://gist.github.com/imaurer/d330e68e70180c985b380f25e195b90c
我知道公认的答案是W, W代表胜利。
但是，在本例中，W也表示宽度。案例研究使用了一个简单的宽度测试来检查像素，但它只是宽度，而不是总像素数。作为一个简单的反例，公认的答案假设O和Q占用相同数量的像素，但它们只占用相同数量的空间。
因此，W占的空间最大。但是，这是所有的像素，它被吹捧吗?
让我们来看看一些经验数据。我从下面的B, M和w中创建了imgur图像，然后分析了它们的像素数(见下文)，结果如下:
B: 114像素
M: 150像素
女:157像素
以下是我如何将它们放入画布并分析图像中的原始像素数据。
var imgs = { B : "//i.imgur.com/YOuEPOn.png", M : "//i.imgur.com/Aev3ZKQ.png", W : "//i.imgur.com/xSUwE7w.png" }; window.onload = function(){ for(var key in imgs){(function(img,key){ var Out = document.querySelector("#"+key+"Out"); img.crossOrigin = "Anonymous"; img.src=imgs[key]; img.onload = function() { var canvas = document.querySelector('#'+key); (canvas.width = img.width,canvas.height = img.height); var context = canvas.getContext('2d'); context.drawImage(img, 0, 0); var data = context.getImageData(0, 0, img.width, img.height).data; Out.innerHTML = "Total Pixels: " + data.length/4 + "<br>"; var pixelObject = {}; for(var i = 0; i < data.length; i += 4){ var rgba = "rgba("+data[i]+","+data[i+1]+","+data[i+2]+","+data[i+3]+")"; pixelObject[rgba] = pixelObject[rgba] ? pixelObject[rgba]+1 : 1; } Out.innerHTML += "Total Whitespace: " + pixelObject["rgba(255,255,255,255)"] + "<br>"; Out.innerHTML += "Total Pixels In "+ key +": " + ((data.length/4)-pixelObject["rgba(255,255,255,255)"]) + "<br>"; }; })(new Image(),key)} }; <table> <tr> <td> <canvas id="B" width="100%" height="100%"></canvas> </td> <td id="BOut"> </td> </tr> <tr> <td> <canvas id="M" width="100%" height="100%"></canvas> </td> <td id="MOut"> </td> </tr> <tr> <td> <canvas id="W" width="100%" height="100%"></canvas> </td> <td id="WOut"> </td> </tr> </table>
Arial 30px在Chrome - W获胜。
那么程序化的解决方案呢?
var capsIndex = 65; var smallIndex = 97 var div = document.createElement('div'); div.style.float = 'left'; document.body.appendChild(div); var highestWidth = 0; var elem; for(var i = capsIndex; i < capsIndex + 26; i++) { div.innerText = String.fromCharCode(i); var computedWidth = window.getComputedStyle(div, null).getPropertyValue("width"); if(highestWidth < parseFloat(computedWidth)) { highestWidth = parseFloat(computedWidth); elem = String.fromCharCode(i); } } for(var i = smallIndex; i < smallIndex + 26; i++) { div.innerText = String.fromCharCode(i); var computedWidth = window.getComputedStyle(div, null).getPropertyValue("width"); if(highestWidth < parseFloat(computedWidth)) { highestWidth = parseFloat(computedWidth); elem = String.fromCharCode(i); } } div.innerHTML = '<b>' + elem + '</b>' + ' won';
