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Best approach to converting Boolean object to string in java
...Object obj) {
return (obj == null) ? "null" : obj.toString();
}
Just test this code:
Boolean b = null;
System.out.println(String.valueOf(b)); // Prints null
System.out.println(Boolean.toString(b)); // Throws NPE
For primitive boolean, there is no difference.
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Using ECMAScript 6
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Arrow functions are now fully implemented in the latest version of chrome. This tip remains useful for other ES6 features though. Like the class syntax, for example.
– Adam Brown
Oct 30 '15 at 2:05
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Ideal Ruby project structure
... freewill
├── lib/
│ └── freewill.rb
├── test/
│ └── test_freewill.rb
├── README
├── Rakefile
└── freewill.gemspec
share
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How to change checkbox's border style in CSS?
... You may need to add !important to your css when using outline. I was testing this in Firefox 12.0 and without !important the outline would vanish for as long as I was clicking the checkbox.
– Weezle
May 16 '12 at 20:18
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Is there an alternative sleep function in C to milliseconds?
... Also note that when compiling with gcc -Wall -g3 -std=c11 -o sleep_test sleep_test.c && ./sleep_test on Linux Ubuntu, with gcc version 4.8.4, I get the following warning: warning: implicit declaration of function ‘usleep’ [-Wimplicit-function-declaration]. The solution is to add ...
PHP: How to send HTTP response code?
...04);
I recommend the 2nd one. The first does work on all browsers I have tested, but some minor browsers or web crawlers may have a problem with a header line that only contains a colon. The header field name in the 2nd. variant is of course not standardized in any way and could be modified, I jus...
Java JUnit: The method X is ambiguous for type Y
I had some tests working fine. Then, I moved it to a different package, and am now getting errors. Here is the code:
3 Answ...
How to check internet access on Android? InetAddress never times out
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Yes, very fast ;-)
Is there no reliable way to check internet, other than testing something on the internet?
Not as far as I know, but let me know, and I will edit my answer.
What if the DNS is down?
Google DNS (e.g. 8.8.8.8) is the largest public DNS in the world. As of 2013 it served 130 billio...
How to decide font color in white or black depending on background color?
...dations is (L1 + 0.05) / (L2 + 0.05), where L1 is the luminance of the lightest color and L2 is the luminance of the darkest on a scale of 0.0-1.0. The luminance of black is 0.0 and white is 1.0, so substituting those values lets you determine the one with the highest contrast. If the contrast for b...
What’s the difference between “Array()” and “[]” while declaring a JavaScript array?
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Unfortunately that test is improperly prepared. It's testing an initialization of an Array with initializations of arrays followed by Array access. There's no control to prove that the browsers are actually pre-allocating the memory (which the ...