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How to sum array of numbers in Ruby?

.../en.wikipedia.org/wiki/MapReduce http://en.wikipedia.org/wiki/Fold_(higher-order_function) share | improve this answer | follow | ...
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Get last n lines of a file, similar to tail

... block_number = -1 blocks = [] # blocks of size BLOCK_SIZE, in reverse order starting # from the end of the file while lines_to_go > 0 and block_end_byte > 0: if (block_end_byte - BLOCK_SIZE > 0): # read the last block we haven't yet read ...
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What is the difference between Type and Class?

...t template. So is the structure type, the Integer type, the Interface type etc. These are all types If you want, you can look at it this way: A type is the parent concept. All the other concepts: Class, Interface, Structure, Integer etc inherit from this concept.i.e They are types ...
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The server principal is not able to access the database under the current security context in SQL Se

...ND su.sid <> 0x0) AND suser_sname(su.sid) is null ORDER BY su.name OPEN orphanuser_cur FETCH NEXT FROM orphanuser_cur INTO @UserName WHILE (@@fetch_status = 0) BEGIN --PRINT @UserName + ' user name being resynced' exec sp_change_users_login 'Update_one', @UserName, @U...
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Adding elements to object

... Your element is not an array, however your cart needs to be an array in order to support many element objects. Code example: var element = {}, cart = []; element.id = id; element.quantity = quantity; cart.push(element); If you want cart to be an array of objects in the form { element: { id: 10...
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Best way to structure a tkinter application? [closed]

...ral style you have to code top-down, defining functions before using them, etc. With this method you don't since you don't actually create the main window until the very last step. I prefer inheriting from tk.Frame just because I typically start by creating a frame, but it is by no means necessary. ...
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How to resolve git's “not something we can merge” error

...h that you want to merge. Git requires local knowledge of both branches in order to merge those branches. You can resolve this by checking out the branch to merge and then going back to the branch you want to merge into. git checkout branch-name git checkout master git merge branch-name This shou...
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What is the fastest substring search algorithm?

...tacker who wants to exploit worst-case performance to cripple your system? Etc.. – R.. GitHub STOP HELPING ICE Jul 7 '10 at 5:46 add a comment  |  ...
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Why shouldn't I use “Hungarian Notation”?

... be much safer to create distinct types (eg. structs) for lengths, weights etc. and use operator overloading to ensure that only valid operations are possible. – JacquesB Jul 3 '14 at 13:55 ...
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List comprehension on a nested list?

... Super useful! Makes it clear that loops (top-to-bottom) are ordered left to right in the generator. This not obvious since in (f(x) for x in l) places the second line of the for-loop equivalent on the left. – user48956 Jan 11 '18 at 18:11 ...