The curly braces mean concatenation, from most significant bit (MSB) on the left down to the least significant bit (LSB) on the right. You are creating a 32-bit bus (result) whose 16 most significant bits consist of 16 copies of bit 15 (the MSB) of the a bus, and whose 16 least significant bits consist … Read more
It’s easier to understand what np.vstack, np.hstack and np.dstack* do by looking at the .shape attribute of the output array. Using your two example arrays: print(a.shape, b.shape) # (3, 2) (3, 2) np.vstack concatenates along the first dimension… print(np.vstack((a, b)).shape) # (6, 2) np.hstack concatenates along the second dimension… print(np.hstack((a, b)).shape) # (3, 4) and … Read more
The SQL standard way of doing this would be: SELECT COALESCE(field1, ”) || COALESCE(field2, ”) || COALESCE(field3, ”) FROM table1 Example: INSERT INTO table1 VALUES (‘hello’, null, ‘world’); SELECT COALESCE(field1, ”) || COALESCE(field2, ”) || COALESCE(field3, ”) FROM table1; helloworld
You can use the String.concat function: <af:outputText value=”#{viewArticle.publish ? ‘Publish on ‘.concat(viewArticle.publishDate).concat(‘ by ‘).concat(viewArticle.publishFirstName).concat(‘ ‘).concat(viewArticle.publishLastName) : ‘Draft version’}”/>
An alternative to @tasseKATT’s answer (which doesn’t require a controller function) is to use string concatenation directly in the expression a filter: angular.module(‘myApp’) .filter(‘youtubeEmbedUrl’, function ($sce) { return function(videoId) { return $sce.trustAsResourceUrl(‘http://www.youtube.com/embed/’ + videoId); }; }); <div ng-src=”https://stackoverflow.com/questions/23405162/{{ video.id.videoId” youtubeEmbedUrl }}”></div> I’ve found this particularly useful when using SVG icon sprites, which requires you to … Read more
Do you want to make a string out of them? String s = new StringBuilder().append(char1).append(char2).append(char3).toString(); Note that String b = “b”; String s = “a” + b + “c”; Actually compiles to String s = new StringBuilder(“a”).append(b).append(“c”).toString(); Edit: as litb pointed out, you can also do this: “” + char1 + char2 + char3; That … Read more
You can use the splice method to replace part of an array with items from another array, but you have to call it in a special way as it expects the items as parameters, not the array. The splice method expects parameters like (0, anotherArr.Length, 1, 2, 3), so you need to create an array … Read more
|| is the ANSI standard string concatenation operator, supported by most databases (notably not MS SQL Server). MySQL also supports it, but you have to SET sql_mode=”PIPES_AS_CONCAT”; or SET sql_mode=”ANSI”; first.