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Select row with most recent date per user
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wow! not only did this work, i was allowed to create a view with this query even though it contains subqueries. before, when i tried to create a view containing subqueries, it didn't let me. are there rules as to why this is allowed but another one isn't?
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How to undo a git merge with conflicts
...nges from before the merge, although it cannot always do so reliably. Generally you shouldn't merge with uncommitted changes anyway.
Prior to version 1.7.4:
git reset --merge
This is older syntax but does the same as the above.
Prior to version 1.6.2:
git reset --hard
which removes all uncom...
Get an object's class name at runtime
...de gets the entire constructor code as a string and applies a regex to get all 'words'. The first word should be 'function' and the second word should be the name of the class.
Hope this helps.
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How big can a user agent string get?
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HTTP specification does not limit length of headers at all.
However web-servers do limit header size they accept, throwing 413 Entity Too Large if it exceeds.
Depending on web-server and their settings these limits vary from 4KB to 64KB (total for all headers).
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What is the correct JSON content type?
...oding is UTF-8. (Source: RFC 4627).
For JSONP (runnable JavaScript) with callback:
application/javascript
Here are some blog posts that were mentioned in the relevant comments:
Why you shouldn't use text/html for JSON
Internet Explorer sometimes has issues with application/json
A rather complete ...
How can I toggle word wrap in Visual Studio?
...rd Wrap (Ctrl+E, Ctrl+W)
General settings: Tools / Options / Text Editor / All Languages / Word wrap
Or search for 'word wrap' in the Quick Launch box.
Known issues:
If you're familiar with word wrap in Notepad++, Sublime Text, or Visual Studio Code, be aware of the following issues where Visual S...
What is mutex and semaphore in Java ? What is the main difference?
... has 10 flags, then your thread won't accept new connections
Mutex are usually used for guarding stuff. Suppose your 10 clients can access multiple parts of the system. Then you can protect a part of the system with a mutex so when 1 client is connected to that sub-system, no one else should have a...
Regular expression search replace in Sublime Text 2
...s in Sublime Text 2. The documentation on this is rather anemic. Specifically, I want to do a replace on groups, so something like converting this text:
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How do I find out what version of WordPress is running?
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Excellent tip that allows for quickly checking without looking up credentials for any one of 100 client accounts and log in to the FTP! An even quicker way is to "Click the W logo" as per the below answer - again, if you have credentials at the...
How do I commit only some files?
...available on both branches you do
git stash # remove all changes from HEAD and save them somewhere else
git checkout <other-project> # change branches
git cherry-pick <commit-id> # pick a commit from ANY branch and apply it to the current
git checkout <first-p...