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How do I make an HTML text box show a hint when empty?
...was added in 3.7. Chrome is fine. Internet Explorer only added support in 10. If you target a browser that does not support input placeholders, you can use a jQuery plugin called jQuery HTML5 Placeholder, and then just add the following JavaScript code to enable it.
$('input[placeholder], textarea...
unobtrusive validation not working with dynamic content
...nd then call
jQuery.validator.unobtrusive.parse(form);
(with the extra bits mentioned) and are then going to submit that form using ajax remember to call
$(form).valid()
which returns true or false (and runs the actual validation) before you submit your form.
...
You have already activated X, but your Gemfile requires Y
...rake and chose 0.9.2.
– B Seven
Jul 10 '11 at 23:00
7
bundle update will also update any gems wit...
How to create GUID / UUID?
...that are created from random numbers. You just have to twiddle a couple of bits to identify it as such. See section 4.4. Algorithms for Creating a UUID from Truly Random or Pseudo-Random Numbers: rfc-archive.org/getrfc.php?rfc=4122
– Jason DeFontes
Sep 19 '08...
Python str vs unicode types
...haracter for easy and unambiguous reference.
Encodings
Map characters to bit patterns.
These bit patterns are used to represent the characters in computer memory or on disk.
There are many different encodings that cover different subsets of characters. In the English-speaking world, the most com...
Is there an MD5 Fixed Point where md5(x) == x?
...
Since an MD5 sum is 128 bits long, any fixed point would necessarily also have to be 128 bits long. Assuming that the MD5 sum of any string is uniformly distributed over all possible sums, then the probability that any given 128-bit string is a fix...
What is an API key? [closed]
...
10
An API key is a unique value that is assigned to a user of this service when he's accepted as a...
How do I Search/Find and Replace in a standard string?
...
You are messing a bit with memory here with all the calls to "replace" : complexity would be n² if you remove "o" from "ooooooo...o". I guess one can do better, but this solution has the merit of being easy to understand.
...
刘强东“一元年薪”背后的O2O棋局 - 资讯 - 清泛网 - 专注C/C++及内核技术
...今年5月份批准了针对公司董事长兼CEO刘强东的一项为期10年的薪酬计划。计划规定，10年内，刘强东每年只能领到1元现金形式底薪和零元现金形式奖金。
难道刘强东就因此连杯奶茶也买不起了吗？这么想就太天真了。
根据京...
【最全】CSS响应式布局的5种实现方式 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...字体大小来控制 rem 的大小。
比如：
html {
font-size: 10px;
}
.box {
width: 10rem;
height: 20rem;
}
当 html 中 font-size: 10px; 时，此时 1rem = 10px，所以 box 盒子的宽高分别为：100px 和 200px;
当我们把 html 中 font-size: 20px; 时，此时 1rem...