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  • c++ memcpy return value

    - by knittl
    according to http://www.cplusplus.com/reference/clibrary/cstring/memcpy/ c++'s memcpy takes three parameters: destination, source and size/bytes. it also returns a pointer. why is that so? aren't the parameters enough to input and copy data. or am i misunderstanding something? the examples don't use the return value

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  • [Linq & Dictionary (.NET)] A problem with compare item value

    - by Tony
    Hi, I have defined my class: public class Host { public string Name; } then a strobgly-typed dictionary: Dictionary<string, Host> HostsTable; then I try to compare a value: if (HostsTable.Values.Where(s => s.Name == "myhostname") != null) { doSomething } and the problem is, nothing is found, even I'm sure the item is on the list. What I'm doing wrong ?

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  • Trying to get the associated value from an Enum at runtime in Java

    - by devoured elysium
    I want to accomplish something like the following (my interest is in the toInt() method). Is there any native way to accomplish this? If not, how can I get the integer associated with an enum value (like in C#) ? enum Rate { VeryBad(1), Bad(2), Average(3), Good(4), Excellent(5); private int rate; private Rate(int rate) { this.rate = rate; } public int toInt() { return rate; } } Thanks

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  • Iterating over key/value pairs in a dict sorted by keys

    - by Helper Method
    I have the following code, which just print the key/value pairs in a dict (the pairs are sorted by keys): for word, count in sorted(count_words(filename).items()): print word, count However, calling iteritems() instead of items() produces the same output for word, count in sorted(count_words(filename).iteritems()): print word, count Now, which one should I choose in this situation? I consulted the Python tutorial but it doesn't really answer my question.

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  • chaining and getting the value of an input

    - by cf_PhillipSenn
    This code gets the text that's in a certain column of a table row: var keyA = $(a).children('td').eq(column).text().toUpperCase(); Q: How do I rewrite this to get the value of an input tag that's in the table cell? var keyA = $(a).children('td').eq(column).('input').val().toUpperCase();

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  • Get groups of 4 elements from name value list using LINQ in C#

    - by Kodefoo
    I am wanting to loop through this list of name value pairs and grab them in groups of 4. The data would be like: value1 1 value2 1 value3 1 value4 1 value1 2 value2 2 value3 2 value4 2 and it would group it as 1 list that contains value1 1 value2 1 value3 1 value4 1 and another list that contains value1 2 value2 2 value3 2 value4 2 I know this can be done easily with a for loop, but I am wondering if there is a good way to do it with LINQ.

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  • LOAD DATA LOCAL INFILE custom value

    - by NR03
    How to add a custom value using LOAD DATA LOCAL INFILE? The column time_added is the 7th column and the file has only 2 values for the first and the second column. For the 7th column, time_added I want to use the unix timestamp when loading from file. This code isn't working: $result = mysql_query("LOAD DATA LOCAL INFILE '{$myFile}' INTO TABLE {$table} FIELDS TERMINATED BY ':' LINES TERMINATED BY '\n' SET `time_added`=unix_timestamp()");

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  • Creating a string variable name from the value of another string

    - by NeonGlow
    In my bash script I have two variables 'CONFIG_OPTION' and 'CONFIG_VALUE' which contain string VENDOR_NAME and Default_Vendor respectively. I need to create a variable with name '$CONFIG_OPTION' ie VENDOR_NAME and assign the value in CONFIG_VALUE to newly created variable. How I can do this? I tried $CONFIG_OPTION=$CONFIG_VALUE But I am getting an error on this line as './Build.bash: line 137: VENDOR_NAME="Default_Vendor": command not found' Thanks.

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  • how can a __global__ function RETURN a value or BREAK out like C/C++ does

    - by user1684726
    Recently i've been doing string comparing jobs on CUDA, and i wonder how can a global function return a value when it finds the exact string that i'm looking for. I mean, i need the global function which contains a great amout of threads to find a certain string among a big big string-pool simultaneously, and i hope that once the exact string is caught, the global funtion can stop all the threads and return back to the main funtion, and tells me "he did it"! B.T.W., I'm using CUDA C .How could i possibly achieve that, waiting for help.

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  • Get value of a checkbox?

    - by user246114
    Hi, I have a checkbox, how do I get its value using jquery? I have this example from searching: var checked = $('input[type=checkbox]:checked').val() != undefined; but how do I specify which checkbox I'm interested in, I want to only examine a checkbox with a particular id? Thanks

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  • building a hex value from integers

    - by StillLearningToCode
    i am trying to generate a hex color value from an integer input, and I'm not sure I'm using the concat method correctly. when i output the string theColor, i only get "0x", any ideas? public String generateColor(String redVal, String blueVal, String greenVal, String alphaVal){ String theColor = "0x"; theColor.concat(alphaVal); theColor.concat(redVal); theColor.concat(greenVal); theColor.concat(blueVal); return theColor; }

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  • how to iterate through multiple select options with jquery

    - by amir
    I was just wondering if it's possible to go through multiple select options and get their values and text(if one is selected get the value and text, if 2 is selected get both of their values and text and so on) I have 15 select boxes in one page? any help would be appreciated. <form> <select class="select" name="select3" id="select3"> <option value="0">0</option> <option value="1.99">1</option> <option value="1.99">2</option> <option value="1.99">3</option> <option value="1.99">4</option> <option value="1.99">5</option> <option value="1.99">6</option> <option value="1.99">7</option> <option value="1.99">8</option> </select> </form> <form> <select class="select" name="select" id="select"> <option value="0">0</option> <option value="1.99">1</option> <option value="1.99">2</option> <option value="1.99">3</option> <option value="1.99">4</option> <option value="1.99">5</option> <option value="1.99">6</option> <option value="1.99">7</option> <option value="1.99">8</option> </select> </form> all the select options have the same class. thanks

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  • How to simplify my country select menu PHP/mysql

    - by user342391
    I have a select menu that displays countries. It looks at the DB and judging by the value in the db shows the option as selected. Is there a simpler way off doing this than: if ($country == 'AG') {echo '<option value="AG" selected="selected">Antigua</option>';} else {echo '<option value="AG">Antigua</option>';}; if ($country == 'AR') {echo '<option value="AR" selected="selected">Argentina</option>';} else {echo '<option value="AR">Argentina</option>';}; if ($country == 'AM') {echo '<option value="AM" selected="selected">Armenia</option>';} else {echo '<option value="AM">Armenia</option>';}; if ($country == 'AW') {echo '<option value="AW" selected="selected">Aruba</option>';} else {echo '<option value="AW">Aruba</option>';}; if ($country == 'AU') {echo '<option value="AU" selected="selected">Australia</option>';} else {echo '<option value="AU">Australia</option >';}; if ($country == 'AT') {echo '<option value="AT" selected="selected">Austria</option>';} else {echo '<option value="AT">Austria</option>';}; if ($country == 'AZ') {echo '<option value="AZ" selected="selected">Azerbaijan</option>';} else {echo '<option value="AZ">Azerbaijan</option>';}; if ($country == 'BS') {echo '<option value="BS" selected="selected">Bahamas</option>';} else {echo '<option value="BS">Bahamas</option>';}; if ($country == 'BH') {echo '<option value="BH" selected="selected">Bahrain</option>';} else {echo '<option value="BH">Bahrain</option>';}; There are a lot of countries and doing this would be madness wouldn't it????

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  • Indexing/Performance strategies for vast amount of the same value

    - by DrColossos
    Base information: This is in context to the indexing process of OpenStreetMap data. To simplify the question: the core information is divided into 3 main types with value "W", "R", "N" (VARCHAR(1)). The table has somewhere around ~75M rows, all columns with "W" make up ~42M rows. Existing indexes are not relevant to this question. Now the question itself: The indexing of the data is done via an procedure. Inside this procedure, there are some loops that do the following: [...] SELECT * FROM table WHERE the_key = "W"; [...] The results get looped again and the above query itself is also in a loop. This takes a lot of time and slows down the process massivly. An indexon the_key is obviously useless since all the values that the index might use are the same ("W"). The script itself is running with a speed that is OK, only the SELECTing takes very long. Do I need to create a "special" kind of index that takes this into account and makes the SELECT quicker? If so, which one? need to tune some of the server parameters (they are already tuned and the result that they deliver seem to be good. If needed, I can post them)? have to live with the speed and simply get more hardware to gain more power (Tim Taylor grunt grunt)? Any alternatives to the above points (except rewriting it or not using it)?

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  • Action on each method's return value

    - by RobGlynn
    What I'd like to do is take some action using the value returned by every method in a class. So for instance, if I have a class Order which has a method public Customer GetCustomer() { Customer CustomerInstance = // get customer return CustomerInstance; } Let's say I want to log the creation of these - Log(CustomerInstance); My options (AFAIK) are: Call Log() in each of these methods before returning the object. I'm not a fan of this because it gets unwieldy if used on a lot of classes with a lot of methods. It also is not an intrinsic part of the method's purpose. Use composition or inheritance to layer the log callon the Order class similar to: public Customer GetCustomer() { Customer CustomerInstance = this.originalCustomer.GetCustomer(); Log(CustomerInstance); return CustomerInstance; } I don't think this buys me anything over #1. Create extension methods on each of the returned types: Customer CustomerInstance = Order.GetCustomer().Log(); which has just as many downsides. I'm looking to do this for every (or almost every) object returned, automatically if possible, without having to write double the amount of code. I feel like I'm either trying to bend the language into doing something it's not supposed to, or failing to recognize some language feature that would enable this. Possible solutions would be greatly appreciated.

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  • Generating dynamic data using Javascript

    - by methuselah
    Given that I have an array of alphabetical characters: var qwerty = [['q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p'], ['a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l'], ['z', 'x', 'c', 'v', 'b', 'n', 'm']]; How would I present them in three rows like on a conventional keyboard using JS without resorting to something like this: <input type='button' value='Q' id='bt1'/> <input type='button' value='W' id='bt2'/> <input type='button' value='E' id='bt3'/> <input type='button' value='R' id='bt4'/> <input type='button' value='T' id='bt5'/> <input type='button' value='Y' id='bt5'/> <input type='button' value='U' id='bt7'/> <input type='button' value='I' id='bt8'/> <input type='button' value='O' id='bt9'/> <input type='button' value='P' id='bt10'/> <br> <input type='button' value='A' id='bt11'/> <input type='button' value='S' id='bt12'/> <input type='button' value='D' id='bt13'/> <input type='button' value='F' id='bt14'/> <input type='button' value='G' id='bt15'/> <input type='button' value='H' id='bt16'/> <input type='button' value='J' id='bt17'/> <input type='button' value='K' id='bt18'/> <input type='button' value='L' id='bt19'/> <br /> ... Many thanks in advance!

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  • Is it wise to store a big lump of json on a database row

    - by Ieyasu Sawada
    I have this project which stores product details from amazon into the database. Just to give you an idea on how big it is: [{"title":"Genetic Engineering (Opposing Viewpoints)","short_title":"Genetic Engineering ...","brand":"","condition":"","sales_rank":"7171426","binding":"Book","item_detail_url":"http://localhost/wordpress/product/?asin=0737705124","node_list":"Books > Science & Math > Biological Sciences > Biotechnology","node_category":"Books","subcat":"","model_number":"","item_url":"http://localhost/wordpress/wp-content/ecom-plugin-redirects/ecom_redirector.php?id=128","details_url":"http://localhost/wordpress/product/?asin=0737705124","large_image":"http://localhost/wordpress/wp-content/plugins/ecom/img/large-notfound.png","medium_image":"http://localhost/wordpress/wp-content/plugins/ecom/img/medium-notfound.png","small_image":"http://localhost/wordpress/wp-content/plugins/ecom/img/small-notfound.png","thumbnail_image":"http://localhost/wordpress/wp-content/plugins/ecom/img/thumbnail-notfound.png","tiny_img":"http://localhost/wordpress/wp-content/plugins/ecom/img/tiny-notfound.png","swatch_img":"http://localhost/wordpress/wp-content/plugins/ecom/img/swatch-notfound.png","total_images":"6","amount":"33.70","currency":"$","long_currency":"USD","price":"$33.70","price_type":"List Price","show_price_type":"0","stars_url":"","product_review":"","rating":"","yellow_star_class":"","white_star_class":"","rating_text":" of 5","reviews_url":"","review_label":"","reviews_label":"Read all ","review_count":"","create_review_url":"http://localhost/wordpress/wp-content/ecom-plugin-redirects/ecom_redirector.php?id=132","create_review_label":"Write a review","buy_url":"http://localhost/wordpress/wp-content/ecom-plugin-redirects/ecom_redirector.php?id=19186","add_to_cart_action":"http://localhost/wordpress/wp-content/ecom-plugin-redirects/add_to_cart.php","asin":"0737705124","status":"Only 7 left in stock.","snippet_condition":"in_stock","status_class":"ninstck","customer_images":["http://localhost/wordpress/wp-content/uploads/2013/10/ecom_images/51M2vvFvs2BL.jpg","http://localhost/wordpress/wp-content/uploads/2013/10/ecom_images/31FIM-YIUrL.jpg","http://localhost/wordpress/wp-content/uploads/2013/10/ecom_images/51M2vvFvs2BL.jpg","http://localhost/wordpress/wp-content/uploads/2013/10/ecom_images/51M2vvFvs2BL.jpg"],"disclaimer":"","item_attributes":[{"attr":"Author","value":"Greenhaven Press"},{"attr":"Binding","value":"Hardcover"},{"attr":"EAN","value":"9780737705126"},{"attr":"Edition","value":"1"},{"attr":"ISBN","value":"0737705124"},{"attr":"Label","value":"Greenhaven Press"},{"attr":"Manufacturer","value":"Greenhaven Press"},{"attr":"NumberOfItems","value":"1"},{"attr":"NumberOfPages","value":"224"},{"attr":"ProductGroup","value":"Book"},{"attr":"ProductTypeName","value":"ABIS_BOOK"},{"attr":"PublicationDate","value":"2000-06"},{"attr":"Publisher","value":"Greenhaven Press"},{"attr":"SKU","value":"G0737705124I2N00"},{"attr":"Studio","value":"Greenhaven Press"},{"attr":"Title","value":"Genetic Engineering (Opposing Viewpoints)"}],"customer_review_url":"http://localhost/wordpress/wp-content/ecom-customer-reviews/0737705124.html","flickr_results":["http://localhost/wordpress/wp-content/uploads/2013/10/ecom_images/5105560852_06c7d06f14_m.jpg"],"freebase_text":"No around the web data available yet","freebase_image":"http://localhost/wordpress/wp-content/plugins/ecom/img/freebase-notfound.jpg","ebay_related_items":[{"title":"Genetic Engineering (Introducing Issues With Opposing Viewpoints), , Good Book","image":"http://localhost/wordpress/wp-content/uploads/2013/10/ecom_images/140.jpg","url":"http://localhost/wordpress/wp-content/ecom-plugin-redirects/ecom_redirector.php?id=12165","currency_id":"$","current_price":"26.2"},{"title":"Genetic Engineering Opposing Viewpoints by DAVID BENDER - 1964 Hardcover","image":"http://localhost/wordpress/wp-content/uploads/2013/10/ecom_images/140.jpg","url":"http://localhost/wordpress/wp-content/ecom-plugin-redirects/ecom_redirector.php?id=130","currency_id":"AUD","current_price":"11.99"}],"no_follow":"rel=\"nofollow\"","new_tab":"target=\"_blank\"","related_products":[],"super_saver_shipping":"","shipping_availability":"","total_offers":"7","added_to_cart":""}] So the structure for the table is: asin title details (the product details in json) Will the performance suffer if I have to store like 10,000 products? Is there any other way of doing this? I'm thinking of the following, but the current setup is really the most convenient one since I also have to use the data on the client side: store the product details in a file. So something like ASIN123.json store the product details in one big file. (I'm guessing it will be a drag to extract data from this file) store each of the fields in the details in its own table field Thanks in advance!

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  • Mystery Key Value Coding Key

    - by Stephen Furlani
    Hello, I'm attempting to load data from an undocumented API (OsiriX). Getting the NSManagedObject like this: NSManagedObject *itemStudy = [[BrowserController databaseOutline] itemAtRow: [[BrowserController databaseOutline] selectedRow]]; works just fine. But getting the NSManagedObject like this: seriesArray = [_context executeFetchRequest:request error:&error]; NSManagedObject *itemSeries = [seriesArray objectAtIndex:0]; Generates an error when I call [itemSeries valueForKey:@"type"] 2010-05-27 11:04:48.178 rcOsirix[27712:7b03] Exception: [<NSManagedObject 0xd30fd0> valueForUndefinedKey:]: the entity Series is not key value coding-compliant for the key "type". This confuses me thoroughly. If I print the KVC values for itemSeries I get this list: 2010-05-27 11:04:48.167 rcOsirix[27712:7b03] KVC comment 2010-05-27 11:04:48.168 rcOsirix[27712:7b03] KVC date 2010-05-27 11:04:48.168 rcOsirix[27712:7b03] KVC dateAdded 2010-05-27 11:04:48.169 rcOsirix[27712:7b03] KVC dateOpened 2010-05-27 11:04:48.169 rcOsirix[27712:7b03] KVC displayStyle 2010-05-27 11:04:48.170 rcOsirix[27712:7b03] KVC id 2010-05-27 11:04:48.170 rcOsirix[27712:7b03] KVC modality 2010-05-27 11:04:48.170 rcOsirix[27712:7b03] KVC name 2010-05-27 11:04:48.171 rcOsirix[27712:7b03] KVC numberOfImages 2010-05-27 11:04:48.171 rcOsirix[27712:7b03] KVC numberOfKeyImages 2010-05-27 11:04:48.171 rcOsirix[27712:7b03] KVC rotationAngle 2010-05-27 11:04:48.172 rcOsirix[27712:7b03] KVC scale 2010-05-27 11:04:48.172 rcOsirix[27712:7b03] KVC seriesDICOMUID 2010-05-27 11:04:48.173 rcOsirix[27712:7b03] KVC seriesDescription 2010-05-27 11:04:48.173 rcOsirix[27712:7b03] KVC seriesInstanceUID 2010-05-27 11:04:48.173 rcOsirix[27712:7b03] KVC seriesSOPClassUID 2010-05-27 11:04:48.174 rcOsirix[27712:7b03] KVC stateText 2010-05-27 11:04:48.174 rcOsirix[27712:7b03] KVC thumbnail 2010-05-27 11:04:48.174 rcOsirix[27712:7b03] KVC windowLevel 2010-05-27 11:04:48.175 rcOsirix[27712:7b03] KVC windowWidth 2010-05-27 11:04:48.175 rcOsirix[27712:7b03] KVC xFlipped 2010-05-27 11:04:48.176 rcOsirix[27712:7b03] KVC xOffset 2010-05-27 11:04:48.176 rcOsirix[27712:7b03] KVC yFlipped 2010-05-27 11:04:48.176 rcOsirix[27712:7b03] KVC yOffset 2010-05-27 11:04:48.177 rcOsirix[27712:7b03] KVC mountedVolume 2010-05-27 11:04:48.177 rcOsirix[27712:7b03] KVC study 2010-05-27 11:04:48.178 rcOsirix[27712:7b03] KVC images The KVC for itemStudy is this: 2010-05-27 10:46:40.336 OsiriX[27266:a0f] KVC accessionNumber 2010-05-27 10:46:40.336 OsiriX[27266:a0f] KVC comment 2010-05-27 10:46:40.336 OsiriX[27266:a0f] KVC date 2010-05-27 10:46:40.336 OsiriX[27266:a0f] KVC dateAdded 2010-05-27 10:46:40.336 OsiriX[27266:a0f] KVC dateOfBirth 2010-05-27 10:46:40.336 OsiriX[27266:a0f] KVC dateOpened 2010-05-27 10:46:40.337 OsiriX[27266:a0f] KVC dictateURL 2010-05-27 10:46:40.337 OsiriX[27266:a0f] KVC expanded 2010-05-27 10:46:40.337 OsiriX[27266:a0f] KVC hasDICOM 2010-05-27 10:46:40.337 OsiriX[27266:a0f] KVC id 2010-05-27 10:46:40.337 OsiriX[27266:a0f] KVC institutionName 2010-05-27 10:46:40.337 OsiriX[27266:a0f] KVC lockedStudy 2010-05-27 10:46:40.337 OsiriX[27266:a0f] KVC modality 2010-05-27 10:46:40.338 OsiriX[27266:a0f] KVC name 2010-05-27 10:46:40.338 OsiriX[27266:a0f] KVC numberOfImages 2010-05-27 10:46:40.338 OsiriX[27266:a0f] KVC patientID 2010-05-27 10:46:40.338 OsiriX[27266:a0f] KVC patientSex 2010-05-27 10:46:40.338 OsiriX[27266:a0f] KVC patientUID 2010-05-27 10:46:40.338 OsiriX[27266:a0f] KVC performingPhysician 2010-05-27 10:46:40.339 OsiriX[27266:a0f] KVC referringPhysician 2010-05-27 10:46:40.339 OsiriX[27266:a0f] KVC reportURL 2010-05-27 10:46:40.339 OsiriX[27266:a0f] KVC stateText 2010-05-27 10:46:40.339 OsiriX[27266:a0f] KVC studyInstanceUID 2010-05-27 10:46:40.339 OsiriX[27266:a0f] KVC studyName 2010-05-27 10:46:40.339 OsiriX[27266:a0f] KVC windowsState 2010-05-27 10:46:40.339 OsiriX[27266:a0f] KVC albums 2010-05-27 10:46:40.340 OsiriX[27266:a0f] KVC series If I use code: NSDictionary *props = [[item entity] propertiesByName]; for (NSString *s in [props allKeys]) { NSLog(@"KVC %@", s); } Yet itemStudy throws no error if I call [itemStudy valueForKey:@"type"] when it should because there's no KVC for @"type"!!! Granted, the objects are different but neither of them contain the key @"type" and they both should throw errors, yet the Osirix code Tests for both conditions: if ([[item valueForKey:@"type"] isEqualToString:@"Series"]) { ... } if ([[item valueForKey:@"type"] isEqualToString:@"Study"]) { ... } And throws no errors. Yet when I load an NSManagedObject of the same exact model and entity @"Series" it throws the 'no key value' when passed into the conditions above. Am I missing something? Both the superentity and subentities of itemSeries and itemStudy are nil so they don't inherit from something that has KVC @"type". I'm totally at a loss as to explain what is going on. --- EDIT --- I know no one can explain what is going on... but maybe where to start looking? How would itemStudy have the extra KVC @"type" that doesn't show up in it's property list? Thank you for your assistance, -Stephen

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