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Dynamic variable names in Bash
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declare "magic_variable_$1=$(ls | tail -1)"
and use indirect parameter expansion to access the value.
var="magic_variable_$1"
echo "${!var}"
See BashFAQ: Indirection - Evaluating indirect/reference variables.
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Should you declare methods using overloads or optional parameters in C# 4.0?
...onal back in my VB6 days and have since missed it, it will reduce a lot of XML comment duplication in C#.
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Where is the Java SDK folder in my computer? Ubuntu 12.04
...link -f $(which java)
Read more at Where can I find the Java SDK in Linux?
WAY-2 (Better than WAY-1) : Below answer is still working and try it if above command is not working
for you.
You need to dig into symbolic links. Below is steps to get Java directory
Step 1:
$ whereis java
ja...
How do I increase the capacity of the Eclipse output console?
...heck this or change the number in the "Console buffer size (characters)" text box below.
(This is in Galileo, Helios CDT, Kepler, Juno, Luna, Mars, Neon, Oxygen and 2018-09)
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Turning live() into on() in jQuery
...ent handlers are bound only to the currently selected elements; they must exist on the page at the time your code makes the call to .on().
Equivalent to .live() would be something like
$(document.body).on('change', 'select[name^="income_type_"]', function() {
alert($(this).val());
});
Alth...
Do you have to include ?
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Internet Explorer invented the favicon and looked for it in the root. AFAIK, all browsers do this. This is why I recommend putting a favicon.ico in the root, because otherwise it will return 404 and most systems don't cache that... so ...
What is the difference between the kernel space and the user space?
...ormal programs run in user space. User space is basically a form of sand-boxing -- it restricts user programs so they can't mess with memory (and other resources) owned by other programs or by the OS kernel. This limits (but usually doesn't entirely eliminate) their ability to do bad things like cra...
module.exports vs exports in Node.js
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Setting module.exports allows the database_module function to be called like a function when required. Simply setting exports wouldn't allow the function to be
exported because node exports the object module.exports references. The followi...
count the frequency that a value occurs in a dataframe column
...b')})
df.groupby('a').count()
Out[37]:
a
a
a 2
b 3
s 2
[3 rows x 1 columns]
See the online docs: http://pandas.pydata.org/pandas-docs/stable/groupby.html
Also value_counts() as @DSM has commented, many ways to skin a cat here
In [38]:
df['a'].value_counts()
Out[38]:
b 3
a 2
s...