array

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Not able to reshape the image in mnist dataset using sklean This is the starting portion of my code just load the data some_digit = X[880] some_digit_image = some_digit.reshape(28, 28) ERROR PART ValueError Traceback (most recent call last) <ipython-input-15-4d618bdb57bc> in <module> 1 some_digit = X[880] ----> 2 some_digit_image = some_digit.reshape(28,28) ValueError: cannot reshape array of size 64 into shape (28,28) 回答1: You can only reshape it into a 8, 8 array. 8x8=64 回答2: try: some_digit = X[880] some_digit_image = some_digit.reshape(8

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have an object (stored as $videos) that looks like this object(stdClass)#19 (3) { [0]=> object(stdClass)#20 (22) { ["id"]=> string(1) "123" etc... I want to get the ID of just that first element, without having to loop over it. If it were an array, I would do this: $videos[0]['id'] It used to work as this: $videos[0]->id But now I get an error "Cannot use object of type stdClass as array..." on the line shown above. Possibly due to a PHP upgrade. So how do I get to that first ID without looping? Is it possible? Thanks! 回答1: Simply iterate

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I have some JDBC code as follows where I am using gemfireXD as DB . I am trying to parallelize the execution of a procedure on a list of inputs. The size of the list I am passing as the parameter to the procedure is not fixed and it is determined after the execution of the query in the code below. This list can be too big in size. Code: private static void executeProc ( Connection cxn ) throws SQLException { Statement stmt = null ; try { stmt = cxn . createStatement (); stmt . execute ( "select distinct field1 from Table1" );

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: There are good solutions to impute panda dataframe. But since I am working mainly with numpy arrays, I have to create new panda DataFrame object, impute and then convert back to numpy array as follows: nomDF=pd.DataFrame(x_nominal) #Convert np.array to pd.DataFrame nomDF=nomDF.apply(lambda x:x.fillna(x.value_counts().index[0])) #replace NaN with most frequent in each column x_nominal=nomDF.values #convert back pd.DataFrame to np.array Is there a way to directly impute in numpy array? 回答1: We could use Scipy's mode to get the highest value in

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I have an array stored as a GVariant of type a(ss) in GSettings, that I want to use in a Cinnamon Applet. I can retrieve the value successfully using the following code: let schema = schema_source . lookup ( SCHEMA_NAME , false ); let settings = new Gio . Settings ({ settings_schema : schema }); let my_value = settings . get_value ( 'myvalue' ); but I can't unpack it. As far as I can see, I will probably need to unpack it using a GVariantIter structure, but the documentation is limited, and I can't find the correct interface in the

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have the following prototype extension because I've been using a lot of reduce : declare interface Array<T> { sum(): T; } Array.prototype.sum = function() { return this.reduce((acc, now) => acc = acc + now, 0); }; is it possible to force this extension to be typed only for number ? 回答1: As I wrote the question, I ended up finding out how to do it: declare interface Array<T> { sum(this: Array<number>): number; } Object.defineProperty(Array.prototype, 'sum', { value: function(this: Array<number>): number { return this.reduce((acc, now) =>

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: So I have the following array ( $lifeSpanArray ) and I'm looking to calculate the average interval between the two dates. What I have so far, but I think I'm thinking slightly wrong with it: <?php foreach ($lifeSpanArray as $key) { $newTimeAdd = new DateTime($key["timeAdded"]); $newTimeRead = new DateTime($key["timeRead"]); $interval = $newTimeAdd->diff($newTimeRead); var_dump($interval); } ?> Which outputs: Array ( [0] => Array ( [timeAdded] => 07/15/2014 [timeRead] => 07/15/2014 ) [1] => Array ( [timeAdded] => 07/14/2014 [timeRead] => 07

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I wanted to create a temporary array to store the input by the user and sort it to get the m smallest elements and refer to the original index of the originalArray and then print the index of the m smallest elements but when I run my code, all I get is -1 . My elements should not be out of bounds of the original array as it is taken from originalArray . Why am I getting -1 ? import java . util .*; public class MinimumSelection { public static void main ( String [] args ) { //Array and variable declarations int [] originalArray ;

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: So I want an array with 10 volatile booleans, not a volatile array with 10 booleans. It probably does not even make sense to have a volatile array reference, correct me if I am wrong. 回答1: If it's only 10 and is always 10, you could simply write: private volatile boolean b1, b2, ..., b10; A possibly cleaner way would be to use an AtomicIntegerArray(10) and map between integers and booleans (0=false, 1=true). You should clarify the reason why you need 10 volatile booleans: there may be a better way. 回答2: I believe the only way is to have a

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I'm having issues working with iOS Swift 2.0 to perform an XOR on a [UInt8] and convert the XORd result to a String. I'm having to interface with a crude server that wants to do simple XOR encryption with a predefined array of UInt8 values and return that result as a String. Using iOS Swift 2.0 Playground, create the following array: let xorResult : [ UInt8 ] = [ 24 , 48 , 160 , 212 ] // XORd result let result = NSString ( bytes : xorResult , length : xorResult . count , encoding : NSUTF8StringEncoding ) The result is always nil.