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If string is empty then return some default value
Often I need to check if some value is blank and write that "No data present" like that:
6 Answers
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Dependent DLL is not getting copied to the build output folder in Visual Studio
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I found that if ProjectX referenced the abc.dll but didn't directly use any of the types DEFINED in abc.dll, then abc.dll would NOT be copied to the main output folder. (It would be copied to the ProjectX output folder, to make it extra-c...
Rails detect if request was AJAX
In my action I wish to only respond with processing if it was called from an AJAX request. How do I check?
5 Answers
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YouTube API to fetch all videos on a channel
...rst maxResults=20 (up to 50) videos, but not the entire channel catalogue. If you want more results, use the pageToken as described here.
– Fábio Perez
Aug 14 '14 at 15:12
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Get file size, image width and height before upload
... document.getElementById('preview');
const readImage = file => {
if ( !(/^image\/(png|jpe?g|gif)$/).test(file.type) )
return EL_preview.insertAdjacentHTML('beforeend', `Unsupported format ${file.type}: ${file.name}<br>`);
const img = new Image();
img.addEventListener('lo...
Using isKindOfClass with Swift
I'm trying to pick up a bit of Swift lang and I'm wondering how to convert the following Objective-C into Swift:
5 Answers
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How is pattern matching in Scala implemented at the bytecode level?
... explored with a disassembler but the short answer is that it's a bunch of if/elses where the predicate depends on the pattern
case Sum(l,r) // instance of check followed by fetching the two arguments and assigning to two variables l and r but see below about custom extractors
case "hello" // equa...
How to lazy load images in ListView in Android
...TIONS OF ANY
KIND, either express or implied. See the License for the
specific language governing permissions and limitations
under the License.
*/
import java.io.IOException;
public class DrawableManager {
private final Map<String, Drawable> drawableMap;
public DrawableManager() {
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Exception thrown in NSOrderedSet generated accessors
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I reproduced your setup both with your data model and one of my own with different names. I got the same error in both cases.
Looks like a bug in Apple's autogenerated code.
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What's the difference between the data structure Tree and Graph?
Academically speaking, what's the essential difference between the data structure Tree and Graph? And how about the tree based search and Graph based search?
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