I’m learning from this tutorial but I keep getting this error: ‘react-router’ does not contain an export named ‘browserHistory’. The file that has react-router is this: Answer You need to get browserHistory from the history module now. Note that they changed the module API recent…
Tag: javascript
Load JSON content from a local file with http.get() in Angular 2
I’m trying to load a local JSON file with http.get() in Angular 2. I tried something that I found here on Stack Overflow. It looks like this: This is my app.module.ts where I import the HttpModule and the JsonModule from @angular/http: In my component, I import Http and Response from @angular/http. Then…
Are arrow functions faster (more performant, lighter) than ordinary standalone function declaration in v8?
I am asking this question because I and my colleague have a dispute on coding style because he prefers arrows function declaration: And I prefer old-style standalone function declaration: My point is that code in old-style more readable and you can more clearly distinguish function and variable declarations. …
How to ‘wait’ for two observables in RxJS
In my app i have something like: Then i get two separated results, first of the _personService and then the _documentService. How can I wait for both results before call this.showForm() to finish an then manipulate the results of each one. Answer Last Update: Mar, 2022. RxJS v7: combineLatestWith From reactiv…
How to define a temporary variable in Vue.js template
Here is my current template: The problem is that i have to write rowLenMap[orderList[n – 1]] multiple times, and i’m afraid vue.js engine will also calculate it multiple times. What i want is something like this: I think it’s not difficult to implement technically because it can be clumsily …
Need to replace default “No data available in table” message in Shiny R renderDataTable
I don’t know much of JavaScript, and I’m having a problem to override the default message in the Shiny R App, when I’m outputting table. When table is empty, it’s giving message “No data available in table” in the first row. I wanted to put some app-specific instructions in…
Recharts – Normalised Stacked Bar Charts
I’m pretty new to both React and Recharts and I’m sitting with a bit of a predicament. I did quite a bit of reading up but I can’t seem to find what I’m looking for, so I am hoping I can get some help here. I have a dataset that includes a list of processes with completed, failed and i…
Get value for given index in QML LISTMODEL
I have a QML ListModel like follows: Then I have some simple QML labels like follows: My problem is to fill that brackets in myListMode.get().myValue. In fact I need a condition: if myListModel has some myId that equals my current labelInt, then return me the corresponding myId, otherwise leave empty space: I…
print Component B inside component A – vue.js
Using Vue.js, How to create componentA that gets componentB as a prop, and print it inside of it? example: index.vue componentA.vue Answer There are some issues to your implementation: You have gotten the scope wrong: componentPlaceHolder lives in the parent scope, not in that of component A. Read: Compilatio…
Nodejs/Express/JSON/Handlebars loop through array not working with multiple values
I am having problems understanding how to loop through an object in Handlebars and possibly passing information from one place to another. Below is a sample json file which I need to read from. In this example, it’s just a bunch of image file names that I want to pull in. This json file is called “…