大约有 15,590 项符合查询结果（耗时：0.0699秒） [XML]
Pass a data.frame column name to a function
...If there is a typo in the column name, then would be safer to stop with an error:
fun <- function(x, column) max(x[[match.call()$column]])
fun(df, typo)
#> Warning in max(x[[match.call()$column]]): no non-missing arguments to max;
#> returning -Inf
#> [1] -Inf
# Stop with error in case...
UIWebView open links in Safari
...ew: WKWebView, didFailProvisionalNavigation navigation: WKNavigation!, withError error: NSError) {
print(error.localizedDescription)
}
func webView(webView: WKWebView, didStartProvisionalNavigation navigation: WKNavigation!) {
print("Strat to load")
}
func webView(web...
Git Pull While Ignoring Local Changes?
...the pull and overwrite changes for convenience. 99% of the time I get this error message when I've accidentally messed something up locally and just want to start over from the repo.
– sudo
Dec 15 '13 at 19:26
...
Why does DEBUG=False setting make my django Static Files Access fail?
...ied this approach of viewing the 404.html and 500.html via some other non-error mechanism similar to what u suggest. But i wanted to know whether it was totally impossible to have my pages render correctly as they would in production, while still merely running on my testing server - the delegation...
Twitter image encoding challenge [closed]
...thoroughly. As you can see, using 5 blue values instead of 6 increased the error slightly less than using 7 values of green decreased it. I didn't try doing both out of laziness. Another problem I have is that I don't have a very good error function. I currently use ∑(∆r²+∆g²+∆b²)/3, whi...
What's the difference between a file descriptor and file pointer?
...contains this file descriptor amongst other things such as end-of-file and error indicator, stream position etc.
So using fopen() gives you a certain amount of abstraction compared to open(). In general you should be using fopen() since that is more portable and you can use all the other standard C...
Are C++ enums signed or unsigned?
...ana; // Okay, Banana is a member of the Fruit enum
fruitVariable = 1; // Error, 1 is not a member of enum Fruit
// even though it has the same value as banana.
share
|
improve...
Install gitk on Mac
...rminal:
brew update
brew install git
brew install git-gui
If you get an error indicating it could not link git, then you may need to change permissions/owners of the files it mentions.
Once completed, run:
type -a git
And make sure it shows:
/usr/local/bin/git
If it does not, run:
brew do...
Android selector & text color
...ut of a view that I made for my ListFragment, and ended up with a bunch of errors. What am I doing wrong?
– MowDownJoe
Apr 3 '13 at 13:55
...
How do I programmatically change file permissions?
...
For correct error handling, CLibrary.chmod() must be declared to throw com.sun.jna.LastErrorException. That is the only thread-safe way of getting the errno value set by the chmod() call. Otherwise, you can get the success/fail status fr...