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How to check if field is null or empty in MySQL?
...
You can use the IFNULL function inside the IF. This will be a little shorter, and there will be fewer repetitions of the field name.
SELECT IF(IFNULL(field1, '') = '', 'empty', field1) AS field1
FROM tablename
...
ROW_NUMBER() in MySQL
...solution is basically the same as if someone would try to find the largest id with the following query: SELECT t1.id FROM test t1 LEFT JOIN test t2 ON t1.id>t2.id WHERE t2.id IS NULL; Does not it require n*n/2 + n/2 IS NULL comparisons to find the single row? Do there happen any optimizations I d...
Adding asterisk to required fields in Bootstrap 3
...ss='text'> <!-- use this class -->
<input class="" id="id_tos" name="tos" required="required" type="checkbox" /> I have read and agree to the Terms of Service
</label>
</div>
</div>
</div>
Ok third edit:
CSS back to what is w...
How to clear Facebook Sharer cache?
...FER, true );
curl_setopt( $ch, CURLOPT_POST, true );
$params = array(
'id' => '<update_url>',
'scrape' => true );
$data = http_build_query( $params );
curl_setopt( $ch, CURLOPT_POSTFIELDS, $data );
curl_exec( $ch );
$httpCode = curl_getinfo( $ch, CURLINFO_HTTP_CODE );
...
Leaflet - How to find existing markers, and delete markers?
...er and also getting all the present/added markers :
Here is the entire JSFiddle code . Also here is the full page demo.
Adding the marker :
// Script for adding marker on map click
map.on('click', onMapClick);
function onMapClick(e) {
var geojsonFeature = {
"type": "Feature",
...
Getting the parent div of element
...
This might help you.
ParentID = pDoc.offsetParent;
alert(ParentID.id);
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How does JPA orphanRemoval=true differ from the ON DELETE CASCADE DML clause
...ect. In this regard, orphanRemoval=true and cascade=CascadeType.REMOVE are identical, and if orphanRemoval=true is specified, CascadeType.REMOVE is redundant.
The difference between the two settings is in the response to disconnecting a relationship. For example, such as when setting the address fi...
Retrieve a Fragment from a ViewPager
...ever changes, then it will no longer work.
What about this solution, overriding instantiateItem() and destroyItem() of your Fragment(State)PagerAdapter:
public class MyPagerAdapter extends FragmentStatePagerAdapter {
SparseArray<Fragment> registeredFragments = new SparseArray<Fragment...
Detect 7 inch and 10 inch tablet programmatically
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From this, we can get the information required to size the display:
int widthPixels = metrics.widthPixels;
int heightPixels = metrics.heightPixels;
This will return the absolute value of the width and the height in pixels, so 1280x720 for the Galaxy SIII, the Galaxy Nexus etc.
This isn't usual...
Why are nested weights bad for performance? Alternatives?
...ted weights are bad for performance because:
Layout weights require a widget to be measured twice. When a
LinearLayout with non-zero weights is nested inside another
LinearLayout with non-zero weights, then the number of measurements
increase exponentially.
It's better to use RelativeLay...