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How do I list all cron jobs for all users?
...from the
# beginning of each line.
function clean_cron_lines() {
while read line ; do
echo "${line}" |
egrep --invert-match '^($|\s*#|\s*[[:alnum:]_]+=)' |
sed --regexp-extended "s/\s+/ /g" |
sed --regexp-extended "s/^ //"
done;
}
# Given a stream...
Linking static libraries to other static libraries
...u will need to include header files too. But it's off topic here as this thread talks about linking and your problem is at the compilation stage.
– evpo
Feb 27 '15 at 5:22
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Efficiency of premature return in a function
...The optimising compiler is almost always smarter than you.
Concentrate on readability and maintainability.
If you want to see what happens, build these with optimisations on and look at the assembler output.
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Android Studio vs Eclipse + ADT Plugin? [closed]
...gins that you can use with the IDE. If you're using the Ultimate edition already and don't want to use two IDE's simultaneously, there is no reason to switch over to Android Studio (except bleeding-edge features).
Android Studio does ship with the C/C++ Plugin now, but AFAIK, there is still no supp...
In Vim, how do I apply a macro to a set of lines?
... input line is shown.
:'<,'>norm! @a
Enter :help normal in vim to read more.
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Sorting an ArrayList of objects using a custom sorting order
...Object Ordering
Although I will give some examples, I would recommend to read it anyway.
There are various way to sort an ArrayList. If you want to define a natural (default) ordering, then you need to let Contact implement Comparable. Assuming that you want to sort by default on name, then do ...
Factors in R: more than an annoyance?
...n be a pain, but my theory is that 90% of why they're a pain is because in read.table and read.csv, the argument stringsAsFactors = TRUE by default (and most users miss this subtlety). I say they are useful because model fitting packages like lme4 use factors and ordered factors to differentially fi...
What is the difference between localStorage, sessionStorage, session and cookies?
...n games). The data stored in localStorage and sessionStorage can easily be read or changed from within the client/browser so should not be relied upon for storage of sensitive or security-related data within applications.
Cookies
This is also true for cookies, these can be trivially tampered with...
How can I check for “undefined” in JavaScript? [duplicate]
...same done in less code.)
Now some people will keel over in pain when they read this, screaming: "Wait! WAAITTT!!! undefined can be redefined!"
Cool. I know this. Then again, most variables in Javascript can be redefined. Should you never use any built-in identifier that can be redefined?
If you f...
What is the difference between Lisp-1 and Lisp-2?
...
You might like to read this paper by Richard Gabriel. It is a summary of the issues that the Lisp community were discussing in Lisp1 vs Lisp2. It's a bit dense and slow moving in the first few sections, but is much easier to read by the time ...