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Check free disk space for current partition in bash
...;>$MAILMESSAGE
# sending email (need to have an email client set up or sendmail)
$MAILCMD -s "Urgent MAIL Alert For $(hostname) AWS Server" "$EMAILIDS" < $MAILMESSAGE
[[ -f $MAILMESSAGE ]] && rm -f $MAILMESSAGE
}
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List directory tree structure in python?
I know that we can use os.walk() to list all sub-directories or all files in a directory. However, I would like to list the full directory tree content:
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List goals/targets in GNU make that contain variables in their definition
I have a fairly large makefile that creates a number of targets on the fly by computing names from variables. (eg foo$(VAR) : $(PREREQS)). Is there any way that gnu make can be convinced to spit out a list of targets after it has expanded these variables?
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How to group dataframe rows into list in pandas groupby?
...]
Name: b, dtype: object
In [3]: df1 = df.groupby('a')['b'].apply(list).reset_index(name='new')
df1
Out[3]:
a new
0 A [1, 2]
1 B [5, 5, 4]
2 C [6]
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New line in JavaScript alert box
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When setting a var in PHP with double quotes, PHP checks for variables inside the double quotes. Theoretically, this costs resources. Simple and straightforward way to create js alerttext in PHP, is using single quotes and add var...
How to exclude a directory in find . command
... which clearly makes no sense with -depth or -delete on.
Performance
I set up a simple test of the three top upvoted answers on this question (replaced -print with -exec bash -c 'echo $0' {} \; to show another action example). Results are below
----------------------------------------------
# o...
Where and why do I have to put the “template” and “typename” keywords?
...
(See here also for my C++11 answer)
In order to parse a C++ program, the compiler needs to know whether certain names are types or not. The following example demonstrates that:
t * f;
How should this be parsed? For many languages a comp...
Is it possible to write data to file using only JavaScript?
...click', function () {
var link = document.createElement('a');
link.setAttribute('download', 'info.txt');
link.href = makeTextFile(textbox.value);
document.body.appendChild(link);
// wait for the link to be added to the document
window.requestAnimationFrame(function () {
...
What is 'Currying'?
...single argument and returns the specified function with the first argument set to the input argument.
Using our previous example we can obtain a curry of f thus:-
let curryf = curry f
We can then do the following:-
let f1 = curryf 1
Which provides us with a function f1 which is equivilent to ...
How to determine SSL cert expiration date from a PEM encoded certificate?
...tent file - the return code is 1.
(Of course, it assumes the time/date is set correctly)
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