There is a native event for images called onerror that lets perform an action if the image cannot be loaded. <img onError={this.addDefaultSrc} className=”img-responsive” src={newsImage} alt={headline}/> //in your component addDefaultSrc(ev){ ev.target.src=”https://stackoverflow.com/questions/38527759/some default image url” }
you could set your own window name, the exact syntax escapes me right now, but you can use the current time and session id to create a unique id on window load, then use that id This would be done the same way you set a name in the javascript window.open() function, (but you can … Read more
Without seeing the render function is a bit tough. Although can already spot something you should do, every time you use an interval you got to clear it on unmount. So: componentDidMount() { this.loadInterval = setInterval(this.loadSearches, this.props.pollInterval); } componentWillUnmount () { this.loadInterval && clearInterval(this.loadInterval); this.loadInterval = false; } Since those success and error callbacks might … Read more
I’m aware that this question was answered 5 years ago, yet today I think I can put some more information into it. First, this is not the official way to share session data between 2 IIS applications, or the most popular way. The “seemingly official” way is to use SQL Server session. In case you … Read more
It’s been some time since I posted the question, which was quite colored by my little experience and knowledge of MVC. Still I received some quite useful input, that eventually led me to find a solution and also gain some insight of MVC. What threw me off in the first place, was that you could … Read more
There are a few things that are technically wrong in terms of React code implementation. Firstly, With ES6 style of writing a class, any function that needs to access the Class properties need to be explicitly binded. In your case you need to bind the handleSubmit function using arrow function of or binding in constructor. … Read more
I had the same issue myself: how to toggle multiple select CheckedTextView in a custom layout (i.e not using android.R.layout.simple_list_item_multiple_choice) The following worked for me. The example I have is a custom view that is provided an adaptor extended from SimpleCursorAdapter. My custom view (row_contact.xml): <?xml version=”1.0″ encoding=”utf-8″?> <FrameLayout xmlns:android=”http://schemas.android.com/apk/res/android” android:layout_height=”wrap_content” android:layout_width=”fill_parent”> <CheckedTextView android:id=”@android:id/text1″ android:layout_width=”fill_parent” … Read more
These are two different syntaxes for setState First: handleOnChange(evt) { this.setState(() => ({ tickerName: evt.target.value })); } uses the updater function as the first argument. Second: handleOnChange(evt) { this.setState({ tickerName: evt.target.value }); } uses the object to be updated When using the synthetic event in the updater function you need to use event.persist() From the … Read more
I suggest to use NinePatch images to customize your EditText. Here goes an example based on my code: The Selector: <selector xmlns:android=”http://schemas.android.com/apk/res/android”> <item android:state_window_focused=”false” android:state_enabled=”true” android:drawable=”@drawable/twitter_im_edittext_normal” /> <item android:state_window_focused=”false” android:state_enabled=”false” android:drawable=”@drawable/twitter_im_edittext_normal” /> <item android:state_pressed=”true” android:drawable=”@drawable/twitter_im_edittext_normal” /> <item android:state_enabled=”true” android:state_focused=”true” android:drawable=”@drawable/twitter_im_edittext_focused” /> <item android:state_enabled=”true” android:drawable=”@drawable/twitter_im_edittext_normal” /> <item android:state_focused=”true” android:drawable=”@drawable/twitter_im_edittext_focused” /> <item android:drawable=”@drawable/twitter_im_edittext_normal” /> </selector> Use selector … Read more
The code here std::cin.clear(std::istream::failbit); doesn’t actually clear the failbit, it replaces the current state of the stream with failbit. To clear all the bits, just call clear(). The description in the standard is a bit convoluted, stated as the result of other functions void clear(iostate state = goodbit); Postcondition: If rdbuf()!=0 then state == rdstate(); … Read more