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How do MySQL indexes work?
...olumn and saving a hash of the big value on it. Let's say you're storing a url in a field and the values are quite big. You could also create an integer field called url_hash and use a hash function like CRC32 or any other hash function to hash the url when inserting it. And then, when you need to q...
Difference between HTTP redirect codes
...correctly, but the results should be retrieved using a GET on the redirect url.
307: Temporary redirect. The entire request should be redirected to the new url. Any post data should be re-posted.
Note that 302 was intended to have the behavior of 307, but most browsers implemented it as the behavi...
CSS hack大全 - 创意 - 清泛网 - 专注C/C++及内核技术
...ound-color:#4eff00;/*IE7、Firefox3.5及以下 识别 */}
@-moz-document url-prefix(){.bb{background-color:#4eff00;/*仅 Firefox 识别 */}}
* +html .bb{background-color:#a200ff;}/* 仅IE7 识别 */
/* 一般情况下 我们区分IE7 只用 +background-color 配合 _background-color 就行了...
How do I reference an existing branch from an issue in GitHub?
...
@jonasfj The Github URL for a branch is static though - it's always /user/repo/tree/branch-name (or /user/repo/commits/branch-name depending on what you want to view)
– GMA
Sep 30 '15 at 13:39
...
Is it possible to put CSS @media rules inline?
... element you will need a more specific selector:
span { background-image: url(particular_ad.png); }
@media (max-width: 300px) {
span { background-image: url(particular_ad_small.png); }
}
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Difference between applicationContext.xml and spring-servlet.xml in Spring Framework
...mapping>
<servlet-name>springweb</servlet-name>
<url-pattern>*.action</url-pattern>
</servlet-mapping>
When Tomcat starts, beans defined in springweb-servlet.xml are instantiated.
DispatcherServlet extends FrameworkServlet. In FrameworkServlet bean instantia...
How can I download HTML source in C#
...w API and it should replace the old ones (WebClient and WebRequest)
string url = "page url";
HttpClient client = new HttpClient();
using (HttpResponseMessage response = client.GetAsync(url).Result)
{
using (HttpContent content = response.Content)
{
string result = content.ReadAsStringAsy...
Rails: Check output of path helper from console
...ly with nested routes, it can get a little confusing to keep track of what URL you'll get for a given route helper method call. Is it possible to, using the Ruby console, see what link a given helper function will generate? For example, given a named helper like post_path(post) I want to see what UR...
Node.js quick file server (static files over HTTP)
...
console.log('request starting...');
var filePath = '.' + request.url;
if (filePath == './')
filePath = './index.html';
var extname = path.extname(filePath);
var contentType = 'text/html';
switch (extname) {
case '.js':
contentType = 'text/javasc...
Displaying files (e.g. images) stored in Google Drive on a website
...karound is to get the fileId with Google Drive SDK API and then using this Url:
https://drive.google.com/uc?export=view&id={fileId}
That will be a permanent link to your file in Google Drive (image or anything else).
Note: this link seems to be subject to quotas. So not ideal for public/mas...