utility

I am new to Java and I referred regarding my question on the Net but not quite Satisfied. I want to know what the "Utility Class" in Java is? Can anybody please tell me with an Example. Thanks, david It's usually a class which only has static methods (possibly with a private constructor and marked abstract/final to prevent instantiation/subclassing). It only exists to make other classes easier to use - for example, providing a bunch of static methods to work with String values, performing extra actions which String itself doesn't support. Utility classes generally don't operate on classes you

Sometime ago I read a blog that showed a misuse of a commandline command that when given a list of files serially showed the content of each file and each file had header line showing the filename of the file below it. Could someone refresh my memory? You can use either tail or head for this: when given multiple files, both tools precede each file's contents with a header containing the file name. $ for i in {1..3}; do echo line$i > file$i; done $ tail file* ==> file1 <== line1 ==> file2 <== line2 ==> file3 <== line3 To output the entire files instead of just the last/first 10 lines of each,

I have the following array: var = array[ {"id" : "aa", "description" : "some description"}, {"id" : "bb", "description" : "some more description"}, {"id" : "cc", "description" : "a lot of description"}] and I try to find the index of the array that contains the id === "bb" . The solution I came up with is the following: var i = 0; while(array[i].id != "bb"){ i++; } alert(i) //returns 1 Is there an easier way that has cross-browser functionality? I tried $.inArray(id,array) but it doesn't work. I don't see any problem with the complexity of your code, but I would recommend a couple of changes

I selected an id in XML, mouse right click, find Usage shows no occurrence of id even Id exist in java file. And if i do the same in Mac its finding it. So is there any cache issue or something else ? To fix the autocomplete go to: File -> Invalidate Caches -> Restart -> Click at Invalidate and Restart I was having the same problem and unfortunately @josedlujan's answer does not solve the problem. Alternatively, you my try the Ctrl + Shift + F to certainly find what you want, also double clicking Shift will open a quick dialog to find certain keyword in the whole project. In my case I was not

I have a large 95% C, 5% C++ Win32 code base that I am trying to grok. What modern tools are available for generating call-graph diagrams for C or C++ projects? Have you tried SourceInsight's call graph feature? http://www.sourceinsight.com/docs35/ae1144092.htm nagul Have you tried doxygen and codeviz ? Doxygen is normally used as a documentation tool, but it can generate call graphs for you with the CALL_GRAPH/CALLER_GRAPH options turned on. Wikipedia lists a bunch of other options that you can try. Good old cflow works fine for C. See here for an implementation. Any decent static analysis

I have been reading that creating dependencies by using static classes/singletons in code, is bad form, and creates problems ie. tight coupling, and unit testing. I have a situation where I have a group of url parsing methods that have no state associated with them, and perform operations using only the input arguments of the method. I am sure you are familiar with this kind of method. In the past I would have proceeded to create a class and add these methods and call them directly from my code eg. UrlParser.ParseUrl(url); But wait a minute, that is introducing a dependency to another class. I