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What are the underlying data structures used for Redis?
...ess just the top or bottom items, or when N is small.
Sets
Sets are an unordered data collection, so they are good every time you have a collection of items and it is very important to check for existence or size of the collection in a very fast way. Another cool thing about sets is support for pe...
How do I implement onchange of with jQuery?
....log("someattr: " + dataAttribute );
});
I recommend use this keyword in order to get access to the entire element so your are able do everything you need with this element.
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Convert a JSON string to object in Java ME?
...ou have many JSON parsers for Java:
JSONObject.java
A JSONObject is an unordered collection of name/value pairs. Its external form is a string wrapped in curly braces with colons between the names and values, and commas between the values and names. The internal form is an object having get() and...
Adding a new entry to the PATH variable in ZSH
...PATH=$HOME/pear/bin:$PATH"
After that you need to run source ~/.zshrc in order your changes to take affect OR close this window and open a new one
OPTION 2: execute it inside the terminal console to add this path only to the current terminal window session. When you close the window/session, it w...
Regex to replace multiple spaces with a single space
...
Edited to order by decreasing speed. Vivek's and Maloric's comments refer to lines with 380 ms and 790 ms.
– Skippy le Grand Gourou
Feb 16 '19 at 21:04
...
Eclipse syntax highlighting preferences save and restore
...veral small settings files (one for Java, one for JSP, HTML, CSS, ...), in order to better analyzing the potential side-effects when re-importing those settings.
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How to start an Intent by passing some parameters to it?
...
In order to pass the parameters you create new intent and put a parameter map:
Intent myIntent = new Intent(this, NewActivityClassName.class);
myIntent.putExtra("firstKeyName","FirstKeyValue");
myIntent.putExtra("secondKeyName"...
What is /dev/null 2>&1?
...nal. It is because we are not redirecting error output to /dev/null, so in order to redirect error output as well, it is required to add 2>&1:
$ ls -l file_doesnot_exists > /dev/null 2>&1
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Fixing “Lock wait timeout exceeded; try restarting transaction” for a 'stuck" Mysql table?
...running transactions with
SELECT * FROM `information_schema`.`innodb_trx` ORDER BY `trx_started`
Your transaction should be one of the first, because it's the oldest in the list. Now just take the value from trx_mysql_thread_id and send it the KILL command:
KILL 1234;
If you're unsure which tr...
Differences between hard real-time, soft real-time, and firm real-time?
...tamps for when frames must appear on the screen. Since the frames are time order sensitive a missed deadline causes jitter, diminishing quality of service. If the missed frame later becomes available it will only cause more jitter to display it, so it's useless. The viewer can still enjoy the progra...