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What is the “right” JSON date format?
...ld be represented, but JavaScript does.
You should use the format emitted by Date's toJSON method:
2012-04-23T18:25:43.511Z
Here's why:
It's human readable but also succinct
It sorts correctly
It includes fractional seconds, which can help re-establish chronology
It conforms to ISO 8601
ISO 860...
How to debug Lock wait timeout exceeded on MySQL?
...
What gives this away is the word transaction. It is evident by the statement that the query was attempting to change at least one row in one or more InnoDB tables.
Since you know the query, all the tables being accessed are candidates for being the culprit.
From there, you should be ...
Generate all permutations of a list without adjacent equal elements
...of k1 + k2 - 1 possible.
This greedy algorithm returns optimal solutions, by the following logic. We call a prefix (partial solution) safe if it extends to an optimal solution. Clearly the empty prefix is safe, and if a safe prefix is a whole solution then that solution is optimal. It suffices to s...
What's the best way to send a signal to all members of a process group?
...
Better look at stackoverflow.com/questions/392022/… its by far a more elegant solution and if you need to list the pids of the children then use: ps -o pid --no-headers --ppid $PARENT_PID
– Szymon Jeż
Sep 15 '11 at 11:19
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What's the difference between findAndModify and update in MongoDB?
I'm a little bit confused by the findAndModify method in MongoDB. What's the advantage of it over the update method? For me, it seems that it just returns the item first and then updates it. But why do I need to return the item first? I read the MongoDB: the definitive guide and it says that i...
Foreign Key to multiple tables
...pends on your needs.
You could simply create two columns in Ticket, OwnedByUserId and OwnedByGroupId, and have nullable Foreign Keys to each table.
You could create M:M reference tables enabling both ticket:user and ticket:group relationships. Perhaps in future you will want to allow a single tick...
How may I reference the script tag that loaded the currently-executing script?
...Does not work with modules <script type="module">
2. Select script by id
Giving the script an id attribute will let you easily select it by id from within using document.getElementById().
<script id="myscript">
var me = document.getElementById('myscript');
</script>
Benefits...
Making the Android emulator run faster
...telHAXM (open the dmg and run the installation). You can find the location by placing your mouse over the Emulator Accelerator entry in the SDK Manager.
Create or update an AVD and specify Intel Atom x86 as the CPU.
P.S: Check this tool, very convenient even trial
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Read values into a shell variable from a pipe
... last! A pipeline may spawn a subshell, where the environment is inherited by value, not by reference. This is why read doesn't bother with input from a pipe - it's undefined.
FYI, http://www.etalabs.net/sh_tricks.html is a nifty collection of the cruft necessary to fight the oddities and incompati...
Lock Android phone application to Portrait mode
...uman-readable. To do so, the code and the previous paragraph must be split by at least two linebreaks, and every line in the code block must be indented with at least 4 spaces. Please try this out by editing your answer, and you will see by yourself how it makes your answer look much better.
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