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Why there is no ConcurrentHashSet against ConcurrentHashMap
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Set<String> mySet = Collections.newSetFromMap(new ConcurrentHashMap<String, Boolean>());
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Getting the array length of a 2D array in Java
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Consider
public static void main(String[] args) {
int[][] foo = new int[][] {
new int[] { 1, 2, 3 },
new int[] { 1, 2, 3, 4},
};
System.out.println(foo.length); //2
System.out.println(foo[0].length); //3
System.out.print...
How to access command line arguments of the caller inside a function?
...you can use $@ and $#.
$# gives you the number of arguments.
$@ gives you all arguments. You can turn this into an array by args=("$@").
So for example:
args=("$@")
echo $# arguments passed
echo ${args[0]} ${args[1]} ${args[2]}
Note that here ${args[0]} actually is the 1st argument and not the ...
Removing Java 8 JDK from Mac
So I installed the beta of JDK 8 a while ago to look at some of the examples. I thought for sure by now, it's easy to change between versions.
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XMLHttpRequest cannot load file. Cross origin requests are only supported for HTTP
...n your machine.
Here are some options that I use.
Test your web page locally on Firefox, then deploy to your host.
or: Run a local server
Test on Firefox, Deploy to Host
Firefox currently allows Cross Origin Requests from files served from your hard drive
Your web hosting site will allow requ...
Configuring Log4j Loggers Programmatically
...le = new ConsoleAppender(); //create appender
//configure the appender
String PATTERN = "%d [%p|%c|%C{1}] %m%n";
console.setLayout(new PatternLayout(PATTERN));
console.setThreshold(Level.FATAL);
console.activateOptions();
//add appender to any Logger (here is root)
Logger.getRootLogge...
Check whether or not the current thread is the main thread
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There are methods like
- (BOOL)isMainThread
+ (BOOL)isMainThread
and + (NSThread *)mainThread
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How do I run only specific tests in Rspec?
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You can run all tests that contain a specific string with --example (or -e) option:
rspec spec/models/user_spec.rb -e "User is admin"
I use that one the most.
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Confused about Service vs Factory
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All angular services are singletons:
Docs (see Services as singletons): https://docs.angularjs.org/guide/services
Lastly, it is important to realize that all Angular services are application singletons. This means that t...
Any way to modify Jasmine spies based on arguments?
...(private configSvc: ConfigService) {
this.configSvc.getAppConfigValue('a_string');
this.configSvc.getAppConfigValue('another_string');
}
In my spec, I provided the ConfigService in the TestBed like so:
{
provide: ConfigService,
useValue: {
getAppConfigValue: (key: any): any {
if...