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Illegal mix of collations (utf8_unicode_ci,IMPLICIT) and (utf8_general_ci,IMPLICIT) for operation '=
...aka the COLLATE cast approach, can lead to potential bottleneck, cause any index defined on the column will not be used causing a full scan.
Even though I did not try out Option 3, my hunch is that it will suffer the same consequences of option 1 and 2.
Lastly, Option 4 is the best option for very...
Loading basic HTML in Node.js
...ugh.
var http = require('http'),
fs = require('fs');
fs.readFile('./index.html', function (err, html) {
if (err) {
throw err;
}
http.createServer(function(request, response) {
response.writeHeader(200, {"Content-Type": "text/html"});
response.wr...
Pry: show me the stack
...personal_site/app/controllers/posts_controller.rb @ line 7 PostsController#index:
5: def index
6: @posts = Post.all
=> 7: binding.pry
8: end
[1] pry(#<PostsController>)> show-stack
Showing all accessible frames in stack (65 in total):
--
=> #0 index <PostsContr...
MySQL Conditional Insert
...s the insert instead of updating or inserting a row when you have a unique index on (user, item).
The query will look like this:
INSERT IGNORE INTO x_table(instance, user, item) VALUES (919191, 123, 456)
You can add the unique index with CREATE UNIQUE INDEX user_item ON x_table (user, item).
...
How to git-cherry-pick only changes to certain files?
...fications you do want
git add <path>
# make the work tree match the index
# (do this from the top level of the repo)
git checkout .
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Why does UITableViewCell remain highlighted?
...
In your didSelectRowAtIndexPath you need to call deselectRowAtIndexPath to deselect the cell.
So whatever else you are doing in didSelectRowAtIndexPath you just have it call deselectRowAtIndexPath as well.
- (void)tableView:(UITableView *)tableV...
Using ECMAScript 6
...Babel, and will have their own Chrome flag.
Using Arrow functions
This question specifically mentioned using arrow functions. Arrow functions are now natively supported in all browsers except IE and Opera Mini. See caniuse.
It used to be a little difficult if you wanted to play with arrow func...
linux 下巧妙使用squid代理服务器 - 更多技术 - 清泛网 - 专注C/C++及内核技术
linux 下巧妙使用squid代理服务器一、代理服务器简介： 代理服务器是目前网络中常见的服务器之一，它可以提供文件缓存、复制和地址过滤等服务，充分利用有限的出口带宽，加 一、代理服务器
简介：
代理服务器是目前网...
What is the shortest way to pretty print a org.w3c.dom.Document to stdout?
...
While easier, this approach requires Xerces
– Pace
Nov 1 '12 at 15:32
3
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How can I move a single directory from a git repository to a new repository whilst maintaining the h
...wering @ilius's question too), you want something like git filter-branch --index-filter 'git rm -r --cached --ignore-unmatched foodir' -- --all
– Brian Campbell
Apr 24 '14 at 14:36
...