Background This question got me thinking about something. Lately, since I've been looking at linq pad's IL functionality, I've been comparing the IL code of two approaches to the same problem to "determine" which is best. Using the question linked to above, about converting an array, I generated the IL code for the two answers: var a...
A broad question I know but: Does anyone have general tips on increasing execution speed in Fortran programs? ...
I have a table in a MySQL database from which I want to select the row with the closest timestamp to another given timestamp. time is the timestamp column (an integer UNIX timestamp). I chose 1250710000 arbitrarily. This is the query that I've come up with, and I'm wondering if there's a more efficient way to do it: SELECT *, ABS(time...
Possible Duplicate: How to sort an array of object by a specific field in C#? Given the following code: MyClass myClass; MyClassArray[] myClassArray = new MyClassArray[10]; for(int i; i < 10; i++;) { myClassArray[i] = new myClass(); myClassArray[i].Name = GenerateRandomName(); } The end result could for example look ...
Hi guys, I have a big doubt and I hope someone can help me out. I need to delete some objects from an arraylist if they meet a condition and I'm wondering which way could be more efficient. Here's the situation: I have a class that contains an arraylist containing some other objects. I have to iterate over this arraylist and delete all ...
Like many here, I am a one-man development team. I'm responsible for everything from gathering project requirements, designing concept-screens, planning and developing databases, and writing all code. Being a one-man team is nice, but has its negatives. I don't have the ability to quickly consult with other developers, I rarely get a se...
I have this method isPalindrome() and am trying to find the time complexity of it, and also rewrite the code more efficiently. boolean isPalindrome(String s) { boolean bP = true; for(int i=0; i<s.length(); i++) { if(s.charAt(i) != s.charAt(s.length()-i-1)) { bP = false; } } return bP; } Now I know this code...
Which is the most efficient way to do this? Sub pvaSetWeek(Optional weekOffset As Long = 0) Dim theDayToday As Long theDayToday = Weekday(Now, vbMonday) 'Set start to Monday Range("pvaStartDate") = Int(Now) - (theDayToday - 1) - (weekOffset * 7) 'Set end to Sunday Range("pvaEndDate") = Int(Now) + (7 - theDayTo...
I asked the most efficient method for mass dynamic string concatenation in an earlier post and I was suggested to use the join method, the best, simplest and fastest method to do so (as everyone said that). But while I was playing with string concatenations, I found some weird(?) results. I'm sure something is going on but I can't not ge...
How can you describe the parameters and return type (getter/setter) of your PHP functions? I need to tell my moderator the return type and list the parameters for each function. I have hundreds of functions so this is becoming problem, since I need to do this for every single revision. I use at the moment the following procedure ack-...
I had an argument with a colleague about writing python efficiently. He claimed that though you are programming python you still have to optimise the little bits of your software as much as possible, as if you are writing an efficient algorithm in C++. Things like: In an if statement with an or always put the condition most likely to ...
I'm a largely self-taught front-end developer only just making the transition into back-end development in order to be able to say yes to more projects. I've found eclipse to be my favourite text editor for javascript and php, but I'm conscious that it (and other IDEs) have a whole load of features which I don't know how to use, or why ...
Hi, i'm trying to find an efficient way to find a subportion of a large grid. Currently I'm looping through rows to define a FROM-TO selection of ids in that row, but this doesn't feel right... Let's say I have a grid of 200x200 fields (x between 1 and 200, y between 1 and 200). Every field also has it's unique ID, starting at X1,Y1 (f...
Hello guys! The company I am doing my intership/appretinceship in, does mainly PLC programming with Siemens modules. Comes from the fact that most of the people were electric guys and switched over to engineering. My problem as newbie there is, that I can't be really efficient and fast when I code PLC software. Even though I am very e...
I need to store a big list of integers in Bigtable(db). For efficiency I am storing them as diff between 2 consecutive items. for eg: original_list = [1005, 1004, 1003, 1004, 1006] Storing the above list(which actually contains more than 1000k items) as start = 1005 diff = [-1, -1, 1, 2] The closest I could manage is, ltp = [st...
I have a number of nodes in a network. The nodes send status information every hour to indicate that they are alive. So i have a list of Nodes and the time when they were last alive. I want to graph the number of alive nodes over the time. The list of nodes is sorted by the time they were last alive but i cant figure out a nice way to c...
How can you document components of your code such as the following effectively when the source codes of the components are in different locations? Example of my components in my first database project homepage - user_bar, check_login_status ask_question - form_ask_question login - form_login question_id - (form_login), form...
I have a following code in a most inner loop of my program struct V { float val [200]; // 0 <= val[i] <= 1 }; V a[600]; V b[250]; V c[250]; V d[350]; V e[350]; // ... init values in a,b,c,d,e ... int findmax(int ai, int bi, int ci, int di, int ei) { float best_val = 0.0; int best_ii = -1; for (int ii = 0; ii < 200; ii++) { ...
Is there any time in which a reference type is more efficient than a value type ? Why ? Can you give an example ? ...
I am looking for research papers, case scenarios etc that explain or show why less code is easier to maintain, debug, etc. Possibly how choice of programming language can affect it etc. I have no idea how to find this information. Googling something like "research programming less code" yield tons of results and the first few pages doesn...