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How to ignore xargs commands if stdin input is empty?
...s /empty_dir/ | xargs -i cp {} {}.bak # every {} is replaced with the args from one input line
ls /empty_dir/ | xargs -I ARG cp ARG ARG.bak # like -i, with a user-specified placeholder
Keep in mind that xargs splits the line at whitespace but quoting and escaping are available; RTFM for details.
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How to create and write to a txt file using VBA
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I'm more than happy if you learned something from my post! :)
– Marcus Mangelsdorf
Aug 17 '18 at 5:59
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What is the Ruby (spaceship) operator?
...,2] <=> [2,2,2]
Ruby will start comparing each element of both array from left hand side.
1 for left array is smaller than 2 of right array. Hence left array is smaller than right array. Output will be -1.
[2,3,2] <=> [2,2,2]
As above it will first compare first element which are equal ...
How to respond with HTTP 400 error in a Spring MVC @ResponseBody method returning String?
...ption: Could not find acceptable representation Is there something missing from the answer?
– Jonik
Apr 27 '13 at 8:52
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RAII and smart pointers in C++
...we just create objects on the stack. For instance (and stealing an example from another answer):
void foo() {
std::string str;
// Do cool things to or using str
}
This works fine - but what if we want to return str? We could write this:
std::string foo() {
std::string str;
// Do ...
Exclude all transitive dependencies of a single dependency
...er Maven 3.1, the <configuration> is ignored when executing the goal from the command-line and must be moved up directly under <plugin>.
– David Harkness
Jul 10 '14 at 0:13
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Best way to trim strings after data entry. Should I create a custom model binder?
... == typeof(NoTrimAttribute)))
and you can mark properties to be excluded from trimming with [NoTrim] attribute.
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Set a DateTime database field to “Now”
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Ok thanks. So I need to be sure to put the actual date (from code) in my request dans not GETDATE() Do you know it setting the SQLparameter to DateTime.Now will do this or If I should first convert the date to a string and then add it to the request ?
– Thiba...
Difference between webdriver.Dispose(), .Close() and .Quit()
...e WebDriver session will not close properly and files would not be cleared from memory. This may result in memory leak errors.
The above explanation should explain the difference between driver.close and driver.quit methods in WebDriver. I hope you find it useful.
The following website has some g...
Get margin of a View
How can I get the margin value of a View from an Activity? The View can be of any type.
4 Answers
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