大约有 15,564 项符合查询结果（耗时：0.0303秒） [XML]
TSQL - Cast string to integer or return default value
... to work? I created a function as suggested and find it throws conversion errors using the proposed test function. I imagine I'm missing something here...
– Keith Hoffman
Apr 30 '14 at 7:45
...
Test if a variable is set in bash when using “set -o nounset”
The following code exits with a unbound variable error. How to fix this, while still using the set -o nounset option?
6 A...
How to debug apk signed for release?
...le keyword in build.gradle and want to publish in play store it shows this error You uploaded a debuggable APK. For security reasons you need to disable debugging before it can be published in Google Play.
– hasnain_ahmad
Apr 23 '18 at 11:46
...
How to use double or single brackets, parentheses, curly braces
... typically iterated over in loops:
$ echo f{oo,ee,a}d
food feed fad
$ mv error.log{,.OLD}
(error.log is renamed to error.log.OLD because the brace expression
expands to "mv error.log error.log.OLD")
$ for num in {000..2}; do echo "$num"; done
000
001
002
$ echo {00..8..2}
00 02 04 06 08
$ echo ...
How to update Ruby to 1.9.x on Mac?
...C package from: https://github.com/kennethreitz/osx-gcc-installer to avoid errors running "make".
Edit: As of Mavericks you can choose to install only the Xcode command line tools instead of the whole Xcode package, which comes with gcc and lots of other things you might need for building packages....
How to convert a data frame column to numeric type?
...e" to numeric. If there's just one character element in vector, you'll get error when trying to convert that vector to numerical one.
And just to prove my point:
> err <- c(1, "b", 3, 4, "e")
> mode(err)
[1] "character"
> class(err)
[1] "character"
> char <- as.numeric(err)
Warni...
How to handle configuration in Go [closed]
...}
err := decoder.Decode(&configuration)
if err != nil {
fmt.Println("error:", err)
}
fmt.Println(configuration.Users) // output: [UserA, UserB]
share
|
improve this answer
|
...
Is 'float a = 3.0;' a correct statement?
...
It is not an error to declare float a = 3.0 : if you do, the compiler will convert the double literal 3.0 to a float for you.
However, you should use the float literals notation in specific scenarios.
For performance reasons:
Specif...
How do I remove a big file wrongly committed in git [duplicate]
...
I have this error: Cannot rewrite branches: You have unstaged changes.
– capybaralet
Oct 13 '17 at 22:10
4
...
mkdir -p functionality in Python [duplicate]
...irectory has different permissions than the intended ones; in that case, OSError is raised as previously:
import os
os.makedirs("/tmp/path/to/desired/directory", exist_ok=True)
For even older versions of Python you can use os.makedirs and ignore the error:
import errno
import os
def mkdir_p...