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Check if character is number?
...ou can use regexp like this:
function is_numeric(str){
return /^\d+$/.test(str);
}
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How to find which rspec test is taking so long
One (or a couple) of our tests are taking forever and we'd like to optimize them.
1 Answer
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Check if a dialog is displayed with Espresso
I'm trying to write some tests with the new android-test-kit (Espresso) . But I can't find any information on how to check if a dialog is displayed and perform some actions on it (like clicking the positive and negative buttons, e.t.c.). Note that a dialog may be also displayed by a WebView , no...
How do you UrlEncode without using System.Web?
... as an answer.
Couldn't find any good examples comparing them so:
string testString = "http://test# space 123/text?var=val&another=two";
Console.WriteLine("UrlEncode: " + System.Web.HttpUtility.UrlEncode(testString));
Console.WriteLine("EscapeUriString: " + Uri.EscapeUriString(testSt...
Check if a variable is of function type
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With updated performance tests it looks like there's a huge speed difference depending on your browser. In Chrome typeof(obj) === 'function' appears to be the fastest by far; however, in Firefox obj instanceof Function is the clear winner.
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How can I link to a specific glibc version?
...provided by glibc. This is mentioned at: https://sourceware.org/glibc/wiki/Testing/Builds?action=recall&rev=21#Compile_against_glibc_in_an_installed_location Those objects do early setup that glibc relies on, so I wouldn't be surprised if things crashed in wonderful and awesomely subtle ways.
F...
What is the difference between “def” and “val” to define a function
...n
//Boolean = true
With def you can get new function on every call:
val test: () => Int = {
val r = util.Random.nextInt
() => r
}
test()
// Int = -1049057402
test()
// Int = -1049057402 - same result
def test: () => Int = {
val r = util.Random.nextInt
() => r
}
test()
// In...
Create Directory When Writing To File In Node.js
... note that fs.promises is still experimental nodejs.org/dist/latest-v10.x/docs/api/…
– lasec0203
Jul 25 '19 at 8:20
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Is it a bad practice to use an if-statement without curly braces? [closed]
...anyone else was wondering like I was which way C actually interprets it, a test I did with GCC interprets this code in the first way. tpcg.io/NIYeqx
– horta
May 23 '18 at 14:48
3
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Using getopts to process long and short command line options
...get "--" as the flag. Then anything following that becomes OPTARG, and you test the OPTARG with a nested case.
This is clever, but it comes with caveats:
getopts can't enforce the opt spec. It can't return errors if the user supplies an invalid option. You have to do your own error-checking as y...