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How do I check if file exists in Makefile so I can delete it?
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More concise: FILE_EXISTS := $(or $(and $(wildcard $(PATH_TO_FILE)),1),0)
– cmaster - reinstate monica
Nov 16 '18 at 14:57
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How can I use goto in Javascript?
...onsole.log("Hello, world!");
i++;
if(i < 538) goto start;
You can read more about how goto is implemented, but basically, it does some JavaScript preprocessing that takes advantage of the fact that you can simulate a goto with a labelled while loop. So, when you write the "Hello, world!" program...
MySQL Select minimum/maximum among two (or more) given values
Is it possible to SELECT the minimum or maximum among two or more values. I'd need something like this:
4 Answers
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Combine two or more columns in a dataframe into a new column with a new name
...::mutate(). Sorry, just trying to be helpful - I won't pollute the site anymore and abstain from future postings.
– sbha
Mar 27 '19 at 22:44
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Why doesn't std::queue::pop return value.?
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Check if a program exists from a Makefile
...t makes for a lot of extra typing as well as processing time when you make more than one target at a time.
The solution provided by 0xf can test for an executable without making a target. That saves a lot of typing and execution time when there are multiple targets that can be built either separate...
Optimizing away a “while(1);” in C++0x
... the optimization of actually
non-terminating loops. The former are much more common than the
latter, and often more interesting to optimize.
There are clearly also for-loops with an integer loop variable in
which it would be difficult for a compiler to prove termination, and
it would t...
Easy way to convert Iterable to Collection
...terables.contains(Iterable, Object)), but the performance implications are more obvious.
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Simulate delayed and dropped packets on Linux
... distribution
Typically, the delay in a network is not uniform. It is more common to use a something like a normal distribution to describe the variation in delay. The netem discipline can take a table to specify a non-uniform distribution.
# tc qdisc change dev eth0 root netem delay 100ms 20m...