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In Bash, how do I add a string after each line in a file?
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edited May 13 at 12:05
answered May 13 at 11:59
欢...
String comparison in bash. [[: not found
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The error is expected when you run the script via sh myscript.sh, because /bin/sh emulates a Bourne shell where [[ is not a builtin. However, running the script via ./script.sh should not yield an error, because in that case the ...
How do I map lists of nested objects with Dapper
... new {Ids = mappings.Select(m => m.LocationId).Distinct()}
);
Map it all up
Leaving this to the reader, you create a few maps and iterate through your courses populating with the locations.
Caveat the in trick will work if you have less than 2100 lookups (Sql Server), if you have more you p...
How to bind RadioButtons to an enum?
... enum value instead of a string representation, and as CrimsonX commented, errors get thrown at compile time rather than runtime:
ConverterParameter={x:Static local:YourEnumType.Enum1}
<StackPanel>
<StackPanel.Resources>
<local:ComparisonConverter x:Key="Compar...
How to use Swift @autoclosure
...ue"
If we omit the braces, we are passing in an expression and that's an error:
f(pred: 2 > 1)
// error: '>' produces 'Bool', not the expected contextual result type '() -> Bool'
@autoclosure creates an automatic closure around the expression. So when the caller writes an expression li...
How do you run a Python script as a service in Windows?
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answered Sep 27 '17 at 14:05
Adriano R P LAdriano R P L
41144 silver badges33 bronze badges
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mkdir's “-p” option
...r fingertips: man mkdir yields this about -p switch:
-p, --parents
no error if existing, make parent directories as needed
Use case example: Assume I want to create directories hello/goodbye but none exist:
$mkdir hello/goodbye
mkdir:cannot create directory 'hello/goodbye': No such file or d...
Inputting a default image in case the src attribute of an html is not valid?
...e. Maybe you wanna use JQuery to hook the event.
<img src="foo.jpg" onerror="if (this.src != 'error.jpg') this.src = 'error.jpg';">
Updated with jacquargs error guard
Updated: CSS only solution
I recently saw Vitaly Friedman demo a great CSS solution I wasn't aware of. The idea is to appl...
Convert string to integer type in Go?
...to int
i, err := strconv.Atoi(s)
if err != nil {
// handle error
fmt.Println(err)
os.Exit(2)
}
fmt.Println(s, i)
}
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How to get process ID of background process?
...olling terminal. A script will not necessarily have a terminal attached at all so job control will not necessarily be available.
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