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`levels
...ivalent to
x <- `levels<-`(x, y)
The trick is, this rewriting is done by <-; it is not done by levels<-. levels<- is just a regular function that takes an input and gives an output; it does not mutate anything.
One consequence of that is that, according to the above rule, <- mu...
Visual Studio refuses to forget breakpoints?
...
no good when I want to remove only ONE breakpoint not all of them
– andrew.fox
Mar 11 '16 at 9:07
1
...
What is the simplest and most robust way to get the user's current location on Android?
...NETWORK_PROVIDER);
//if there are both values use the latest one
if(gps_loc!=null && net_loc!=null){
if(gps_loc.getTime()>net_loc.getTime())
locationResult.gotLocation(gps_loc);
else
loc...
How to insert element as a first child?
...children, if the parent container contains different children elements and one wants to insert before a specific group of child nodes, this will not work.
– Aurovrata
Nov 7 '18 at 3:36
...
When would you use .git/info/exclude instead of .gitignore to exclude files?
...exclude. Another advantage is that you can have multiple .gitignore files, one inside each directory/subdirectory for directory specific ignore rules, unlike .git/info/exclude.
So, .gitignore is available across all clones of the repository. Therefore, in large teams all people are ignoring the sam...
CURL to access a page that requires a login from a different page
... 1st command are not available; it's just as if you logged in to page a in one browser session, and tried to access page b in a different one.
What you need to do is save the cookies created by the first command:
curl --user user:pass --cookie-jar ./somefile https://xyz.com/a
and then read them ...
What's the difference between Ruby's dup and clone methods?
...rent semantics. In Object itself, there are two key differences.
First, clone copies the singleton class, while dup does not.
o = Object.new
def o.foo
42
end
o.dup.foo # raises NoMethodError
o.clone.foo # returns 42
Second, clone preserves the frozen state, while dup does not.
class Foo
...
Cython: “fatal error: numpy/arrayobject.h: No such file or directory”
...bject.h: No such file or directory...compilation terminated error. Can anyone tell me if it's a problem with my code, or some esoteric subtlety with Cython?
...
How to change column order in a table using sql query in sql server 2005?
... Both obviously not recommended practices, but SQL Server allows it so someone may have used it somewhere, possibly breaking T-SQL code when changing column order.
– Carvellis
Jul 7 '14 at 13:38
...
PowerShell script to return versions of .NET Framework on a machine?
...n]'4.7.2'
528040 = [version]'4.8'
528049 = [version]'4.8'
}
# For One True framework (latest .NET 4x), change the Where-Object match
# to PSChildName -eq "Full":
Get-ChildItem 'HKLM:\SOFTWARE\Microsoft\NET Framework Setup\NDP' -Recurse |
Get-ItemProperty -name Version, Release -EA 0 |
...