switch-statement

问题 so in my Vue-project I basically have two pages/components that will be shown with the use of vue-router depending on the url. I can switch between those pages/components via a button. I am also using vuex for the management of some data. Now I included a switch in one of the components to toggle between a dark and a light theme from vuetify. In the template for this component I do: <v-switch label="Toggle dark them" @change="toggleDarkTheme()" ></v-switch> And in the function that gets

问题 so in my Vue-project I basically have two pages/components that will be shown with the use of vue-router depending on the url. I can switch between those pages/components via a button. I am also using vuex for the management of some data. Now I included a switch in one of the components to toggle between a dark and a light theme from vuetify. In the template for this component I do: <v-switch label="Toggle dark them" @change="toggleDarkTheme()" ></v-switch> And in the function that gets

问题 So let me start by saying I am new to C#. I have a switch statement that currently has 10 different cases, however, I need to use it 3 different times (same 10 cases, different results per case), and each case there is only a slight change. I feel like I'm just repeating code, is there a way to shorten it? //Set the growth time of the crop based on what cropType. switch (cropType) { case 1: //Potatoes growth = 60; break; case 2: //Strawberries growth = 80; break; case 3: //Cabbages growth =

问题 I would like to use a switch statement within dplyr's mutate. I have a simple function that performs some operations and assigns alternative values via switch, for example: convert_am <- function(x) { x <- as.character(x) switch(x, "0" = FALSE, "1" = TRUE, NA) } This works as desired when applied to scalars: >> convert_am(1) [1] TRUE >> convert_am(2) [1] NA >> convert_am(0) [1] FALSE I would like to arrive at equivalent results via mutate call: mtcars %>% mutate(am = convert_am(am)) This

问题 I am making an expression parser for a calculator. The expressions will contain a variable, for instance, a user could enter "x + 2", or "y^2". I have a switch statement, and one of the cases in switch statement performs a certain action when it detects a variable: case variableSymbol: if (expression.length() == 1) { rangeResult = x1; break outer; } varFlag = true; varPos = expresPos; break; Originally, I hard coded a value 'x' in the above case, but I would like to give users a choice as to

问题 I am making an expression parser for a calculator. The expressions will contain a variable, for instance, a user could enter "x + 2", or "y^2". I have a switch statement, and one of the cases in switch statement performs a certain action when it detects a variable: case variableSymbol: if (expression.length() == 1) { rangeResult = x1; break outer; } varFlag = true; varPos = expresPos; break; Originally, I hard coded a value 'x' in the above case, but I would like to give users a choice as to

问题 I am making an expression parser for a calculator. The expressions will contain a variable, for instance, a user could enter "x + 2", or "y^2". I have a switch statement, and one of the cases in switch statement performs a certain action when it detects a variable: case variableSymbol: if (expression.length() == 1) { rangeResult = x1; break outer; } varFlag = true; varPos = expresPos; break; Originally, I hard coded a value 'x' in the above case, but I would like to give users a choice as to

问题 In the interest of future readers and my own sanity later, I like to make it absolutely clear that switch statements that do not have a default case (due to all cases being covered) or sequential if-elseif-else with a final else that should not do anything must not be omitted and a comment to that effect be included (see example). However, whenever I include the default case in the switch statement and leave it empty I must put a semicolon inside the default case or a compiler error: " Line

问题 This question already has answers here : Closed 9 years ago . Possible Duplicate: C/C++: switch for non-integers C/C++ switch case with string I am passing a string to a function get_band(char *str) Then I am comparing the passed argument with a specific string if(strcmp(str, "auto")) { //do something } My question is - since i have many number of strings to compare, how can i use switch statement instead of if/else, since switch statement supports only integral type. 回答1: Short answer: you

问题 Is it possible to manually select a strings.xml file without changing the language of your device? I would like to have Button to switch between two languages, but all i found is to use the build-in feature of android studio to create different strings.xml , which are selected by your localization. 回答1: If you want to use a different strings.xml you have to switch localization. This can be done programmatically but is highly not recommended because you will mess with the system. You can