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Batch equivalent of Bash backticks
...scripts with the for /f command:
for /f "usebackq tokens=*" %%a in (`echo Test`) do my_command %%a
Yeah, it's kinda non-obvious (to say the least), but it's what's there.
See for /? for the gory details.
Sidenote: I thought that to use "echo" inside the backticks in a "for /f" command would nee...
Batch not-equal (inequality) operator
...mally you should turn them on with setlocal, but for a simple if not equal test, just use "if not", it goes back to the good old DOS days
– Anders
Sep 14 '09 at 20:27
add a co...
How do I perform an IF…THEN in an SQL SELECT?
...lumnname>
FROM <table>
The extended case:
SELECT CASE WHEN <test> THEN <returnvalue>
WHEN <othertest> THEN <returnthis>
ELSE <returndefaultcase>
END AS <newcolumnname>
FROM <table>
You can ev...
Sort a text file by line length including spaces
...
Answer
cat testfile | awk '{ print length, $0 }' | sort -n -s | cut -d" " -f2-
Or, to do your original (perhaps unintentional) sub-sorting of any equal-length lines:
cat testfile | awk '{ print length, $0 }' | sort -n | cut -d" " -f2...
Pandas convert dataframe to array of tuples
...e any reason that we'd think that the accepted answer is faster? The quick test I did indicates that the itertuples version is faster.
– T.C. Proctor
Mar 1 '19 at 19:27
2
...
Emulate a do-while loop in Python?
...p:
condition = True
while condition:
# loop body here
condition = test_loop_condition()
# end of loop
The key features of a do-while loop are that the loop body always executes at least once, and that the condition is evaluated at the bottom of the loop body. The control structure show h...
How to pass a class type as a function parameter
...is causing the error and uncovering type inference issues:
let service = "test"
let params = ["test" : "test"]
let returningClass = CityInfo.self
CastDAO.invokeService(service, withParams: params, returningClass: returningClass) { cityInfo in /*...*/
}
Now there are two possibilities: the error...
Should I make HTML Anchors with 'name' or 'id'?
...ir order within the page), Chrome and Firefox will jump to the id, but IE (tested in 11) and Edge will jump to the name
– Alvaro Montoro
Aug 5 '16 at 2:11
...
Using str_replace so that it only acts on the first match?
... properly escaped because of preg_quote's second parameter (one can easily test that). I'd be interested to hear about specific issues (which would be serious PCRE security bugs in my book).
– MvanGeest
Jan 31 '17 at 2:30
...
How to convert std::string to NSString?
...Firstly, you've got to be using Objective-C++ for this to work in the slightest; easiest way to ensure that is rename all your *.m files to *.mm
By far the most usable (non-deprecated) manual way of getting a C++ std::string into an NSString is with:
std::string param; // <-- input
NSString* re...