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Why is $$ returning the same id as the parent process?
...t misleading (at least it was to me), it's actually the "top level" shell. For instance : echo $$; (echo $$; (echo $$)) echoes the same pid three times
– Martin Bouladour
Jul 20 '17 at 9:59
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Fastest way to replace NAs in a large data.table
... gdata::NAToUnknown(dt, un)
f_dowle = function(dt) { # see EDIT later for more elegant solution
na.replace = function(v,value=0) { v[is.na(v)] = value; v }
for (i in names(dt))
eval(parse(text=paste("dt[,",i,":=na.replace(",i,")]")))
}
system.time(a_gdata = f_gdata(dt1))
user syst...
Why should I care about lightweight vs. annotated tags?
.... Maybe it helps explain the purpose of that particular tag. Maybe the tag for a release candidate contains a bit of a status/to-do list.
Signing tags is pretty much like signing anything else - it provides one more level of security for the paranoid. Most of us aren't ever going to use it, but if ...
Difference between global and device functions
...tions can be called from the host, and it is executed in the device.
Therefore, you call __device__ functions from kernels functions, and you don't have to set the kernel settings. You can also "overload" a function, e.g : you can declare void foo(void) and __device__ foo (void), then one is execut...
How to remove close button on the jQuery UI dialog?
... $(".ui-dialog-titlebar-close", ui).hide(); to hide the button for this dialog only.
– Anthony Serdyukov
Feb 8 '10 at 11:42
67
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How do I revert a Git repository to a previous commit?
...away your local changes, but you can at least get back to where you were before by resetting again.
Undo published commits with new commits
On the other hand, if you've published the work, you probably don't want to reset the branch, since that's effectively rewriting history. In that case, you coul...
What is the recommended way to use Vim folding for Python code
I am interested in enabling code folding in Vim for Python code. I have noticed multiple ways to do so.
11 Answers
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How to convert an NSString into an NSNumber
...
Use an NSNumberFormatter:
NSNumberFormatter *f = [[NSNumberFormatter alloc] init];
f.numberStyle = NSNumberFormatterDecimalStyle;
NSNumber *myNumber = [f numberFromString:@"42"];
If the string is not a valid number, then myNumber will be n...
How to use the toString method in Java?
...extually represents" this object.
The result should be a concise but
informative representation that is
easy for a person to read. It is
recommended that all subclasses
override this method.
The toString method for class Object
returns a string consisting of the
name of the class...
How to find corresponding log files folder for a web site?
...
ID: the webste unique identify, use for log files and trace files
– Julian89757
Oct 15 '18 at 8:14
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