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SQL Joins Vs SQL Subqueries (Performance)?
...explicit JOIN. In my experience IN is a very slow operator, since SQL normally evaluates it as a series of WHERE clauses separated by "OR" (WHERE x=Y OR x=Z OR...).
As with ALL THINGS SQL though, your mileage may vary. The speed will depend a lot on indexes (do you have indexes on both ID column...
How to trigger Autofill in Google Chrome?
...stion and one for which documentation is surprisingly hard to come by. Actually, in many cases you will find that the Chrome Autofill functionality "just works." For example, the following snippet of html produces a form which, at least for me (Chrome v. 18), is automatically filled after clicking i...
Creating a new empty branch for a new project
...branches departing from the original branch. But now we want to create a small new project to track some documentation. For that we would want to create a new empty branch to start storing our files, and I would want other users of the network to clone that branch.
...
Can I save the window layout in Visual Studio 2010/2012/2013?
... and Export Settings Wizard" again to import that settings file, restoring all of your tool windows to their previous layout. (Note that the wizard also allows you to limit what you import from a particular settings file the same way you can limit what you export.)
I use this on my laptop, where sw...
PhpCms v9 Tag url静态化全攻略 兼容\"+\",\"#\"等特殊字符 - 更多技术 - ...
...tag/(.*)$ index.php?m=content&c=tag&a=lists&tag=$1&%1
RewriteCond %{QUERY_STRING} ^(.*)$
二、修改所有访问Tag的链接：
全局搜索 index.php?m=content&c=tag&a=lists&tag=
整体替换为：tag/ （建议一个个手动替换，改动地方不多）
三、修改处理Tag处的逻...
PhpCms v9 Tag url静态化全攻略 兼容\"+\",\"#\"等特殊字符 - 更多技术 - ...
...tag/(.*)$ index.php?m=content&c=tag&a=lists&tag=$1&%1
RewriteCond %{QUERY_STRING} ^(.*)$
二、修改所有访问Tag的链接：
全局搜索 index.php?m=content&c=tag&a=lists&tag=
整体替换为：tag/ （建议一个个手动替换，改动地方不多）
三、修改处理Tag处的逻...
Printing the last column of a line in a file
...ile | awk '/A1/ {print $NF}'
or without tail, showing the last column of all lines containing A1
awk '/A1/ {print $NF}' file
Thanks to @MitchellTracy's comment, tail might miss the record containing A1 and thus you get no output at all. This may be solved by switching tail and awk, searching ...
Get keys from HashMap in Java
...HashMap contains more than one key. You can use keySet() to get the set of all keys.
team1.put("foo", 1);
team1.put("bar", 2);
will store 1 with key "foo" and 2 with key "bar". To iterate over all the keys:
for ( String key : team1.keySet() ) {
System.out.println( key );
}
will print "foo"...
Scrolling a flexbox with overflowing content
... They work when the parent's height doesn't depend on its children, generally, which is the case here. min-height: 100% does indeed fix your stretch-even-when-columns-are-short issue in Firefox (though not in Chrome). Not sure offhand if that's a Chrome bug or a Firefox bug.
...
momentJS date string add 5 days
...
UPDATED: January 19, 2016
As of moment 2.8.4 - use .add(5, 'd') (or .add(5, 'days')) instead of .add('d', 5)
var new_date = moment(startdate, "DD-MM-YYYY").add(5, 'days');
Thanks @Bala for the information.
UPDATED: March 21, 2014
This is what you'd h...