variables

问题 In bootstrap 4 you can define and/or override default colors using the following array: (as documented here) $theme-colors: ( "primary": #001122, /*override*/ "color-1": red, /*new color*/ "color-2": black, /*new color*/ "color-3": white /*new color*/ ); I want to make custom theme colors for different users. Users can choose different color palettes which I have defined based on the class of the body. I made a new file to make my own styles, defining my theme colors in CSS variables in the

问题 Is there a way to create a string of say 256 characters at initialization with c++? Part of my assignment requires me to "1. Create a string of 256 characters. Use repetitions of your first name." I'm not quite sure of how to do this other than using a loop but I feel like there is an easier way. 回答1: Taking a look at the constructor reference of basic_string, one can see that there is no easy way of repeating a complete string . For a single character, you could use (2) like this: std:

问题 In Java, when one declares a string variable the word "String" is capitalized, yet it isn't in any of the other types I've run across (e.g. "int" or "double"). Why is this? Was it just some weird arbitrary decision by the designers? 回答1: Why does is declaration of a string variable in Java capitalized? The String type is capitalized because it is a class , like Object , not a primitive type like boolean or int (the other types you probably ran across). As a class, the String follows the

问题 In Java, when one declares a string variable the word "String" is capitalized, yet it isn't in any of the other types I've run across (e.g. "int" or "double"). Why is this? Was it just some weird arbitrary decision by the designers? 回答1: Why does is declaration of a string variable in Java capitalized? The String type is capitalized because it is a class , like Object , not a primitive type like boolean or int (the other types you probably ran across). As a class, the String follows the

问题 What is the scope of variables in javascript? Do they have the same scope inside as opposed to outside a function? Or does it even matter? Also, where are the variables stored if they are defined globally? 回答1: TLDR JavaScript has lexical (also called static) scoping and closures. This means you can tell the scope of an identifier by looking at the source code. The four scopes are: Global - visible by everything Function - visible within a function (and its sub-functions and blocks) Block -

问题 I would like to access to variables in other structs to have a total count. Example code would demonstrate better: struct level1: View { @State var score1 = 5 } struct level2: View { @State var score2 = 7 } In another struct, I would like to be able use score1 and score2 variables. The below code doesn't work, but I need something like this. struct finalScore: View { @State var totalScore = level1.score1 + level2.score2 } 回答1: Rethink it in some different way... like below, single-source

问题 I would like to access to variables in other structs to have a total count. Example code would demonstrate better: struct level1: View { @State var score1 = 5 } struct level2: View { @State var score2 = 7 } In another struct, I would like to be able use score1 and score2 variables. The below code doesn't work, but I need something like this. struct finalScore: View { @State var totalScore = level1.score1 + level2.score2 } 回答1: Rethink it in some different way... like below, single-source

问题 I have 3 files in the same directory : test1.py , test2.py and init .py. In test1.py I have this code: def test_function(): a = "aaa" In test2.py I have this code: from test1 import * def test_function2(): print(a) test_function2() I can import "test_function" (and call the function) into test2.py but i cannot use the variable "a" in test2.py . Error : Unresolved reference "a" . I would like to know if it possible to use "a" inside test2.py . 回答1: In test1.py you could have a function that

问题 I'd like to create several xsl:variable that may or may not be null then join them: <xsl:variable name="creatorType" select="replace(lib:merge(subfields/subfield[matches(@code,'[e]')],' '),'author|[.$]','')" /> <xsl:variable name="creatorAttribution" select="replace(lib:merge(subfields/subfield[matches(@code,'[j]')],' '),'[,-.]$','')" /> <xsl:variable name="creatorNameFullForm" select="replace(lib:merge(subfields/subfield[matches(@code,'[q]')],' '),'[,-()]$','')" /> <xsl:variable name=

问题 I'd like to create several xsl:variable that may or may not be null then join them: <xsl:variable name="creatorType" select="replace(lib:merge(subfields/subfield[matches(@code,'[e]')],' '),'author|[.$]','')" /> <xsl:variable name="creatorAttribution" select="replace(lib:merge(subfields/subfield[matches(@code,'[j]')],' '),'[,-.]$','')" /> <xsl:variable name="creatorNameFullForm" select="replace(lib:merge(subfields/subfield[matches(@code,'[q]')],' '),'[,-()]$','')" /> <xsl:variable name=