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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
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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
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How to get the name of the current method from code [duplicate]
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+1 because using reflection is several order of magnitude faster than using StackTrace.
– Giuseppe Romagnuolo
Feb 7 '14 at 22:53
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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?
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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"...
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...
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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