大约有 40,000 项符合查询结果（耗时：0.0471秒） [XML]
Preventing console window from closing on Visual Studio C/C++ Console application
...ct
Properties > Configuration Properties > Linker > System
Select Console (/SUBSYSTEM:CONSOLE) in SubSystem option or you can just type Console in the text field!
Now try it...it should work
share
|...
How to get the last N rows of a pandas DataFrame?
...
This is because of using integer indices (ix selects those by label over -3 rather than position, and this is by design: see integer indexing in pandas "gotchas"*).
*In newer versions of pandas prefer loc or iloc to remove the ambiguity of ix as position or label:
df....
How to get device make and model on iOS?
...size_t size;
sysctlbyname("hw.machine", NULL, &size, NULL, 0);
char *model = malloc(size);
sysctlbyname("hw.machine", model, &size, NULL, 0);
NSString *deviceModel = [NSString stringWithCString:model encoding:NSUTF8StringEncoding];
free(model);
return de
filter for complete cases in data.frame using dplyr (case-wise deletion)
...function which lets you specify columns (basically everything which dplyr::select can understand) which should not have any NA values (modeled after pandas df.dropna()):
drop_na <- function(data, ...){
if (missing(...)){
f = complete.cases(data)
} else {
f <- complete....
H2 in-memory database. Table not found
...ID INT PRIMARY KEY, FIRSTNAME VARCHAR(64), LASTNAME VARCHAR(64)); . I then select everything from this (empty) table using SELECT * FROM PERSON . So far, so good.
...
How can I view array structure in JavaScript with alert()?
... + item + "' => \"" + value + "\"\n";
}
}
} else { //Stings/Chars/Numbers etc.
dumped_text = "===>"+arr+"<===("+typeof(arr)+")";
}
return dumped_text;
}
share
|
improve thi...
Where is Erlang used and why? [closed]
...; none.
That's 5 different versions of the access function.
Erlang will select the most appropriate version given the arguments received. (Config is a structure of type #config which has a type attribute).
That means it is very easy and much clearer than chaining if/else or switch/case to make b...
How add context menu item to Windows Explorer for folders [closed]
...grampath\path\path\executable.exe %1 to pass the file path and
name of the selected file to your custom program
More customization:
Add icon: add a string value named icon for key created at step 1 with value matching an icon resource path. You can also provide an integer arguments to specify ...
How to remove all whitespace from a string?
...paces before, after and in between
" \u2190 \u2192 ", # contains unicode chars
paste0( # varied whitespace
whitespace,
"x",
whitespace,
"y",
whitespace,
collapse = ""
),
NA # missing
)
## [1] " x y "
#...
How do I force a UITextView to scroll to the top every time I change the text?
...tion:0, length:0, worked. My text view was not editable, and I tested both selectable and not selectable (neither setting affected the result). Here's a Swift example:
myTextView.text = "Text that is long enough to scroll"
myTextView.scrollRangeToVisible(NSRange(location:0, length:0))
...