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Detect when an image fails to load in Javascript
...) {
var tester=new Image();
tester.onload=imageFound;
tester.onerror=imageNotFound;
tester.src=URL;
}
function imageFound() {
alert('That image is found and loaded');
}
function imageNotFound() {
alert('That image was not found.');
}
testImage("http://foo.com/bar.jpg");
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file_put_contents(meta/services.json): failed to open stream: Permission denied
... This should be sudo chmod -R 777 app/storage. to avoid permission error.
– Olaitan Mayowa
Oct 8 '14 at 10:10
5
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How to get a thread and heap dump of a Java process on Windows that's not running in a console
...n Control?
– Vadzim
Jan 10 '19 at 8:05
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Can I use Class.newInstance() with constructor arguments?
I would like to use Class.newInstance() but the class I am instantiating does not have a nullary constructor. Therefore I need to be able to pass in constructor arguments. Is there a way to do this?
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SQL server query to get the list of columns in a table along with Data types, NOT NULL, and PRIMARY
...replace YourTableName with your actual table name - works for SQL Server 2005 and up.
In case you are using schemas, replace YourTableName by YourSchemaName.YourTableName where YourSchemaName is the actual schema name and YourTableName is the actual table name.
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How can I select rows with most recent timestamp for each key value?
I have a table of sensor data. Each row has a sensor id, a timestamp, and other fields. I want to select a single row with latest timestamp for each sensor, including some of the other fields.
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How to save the output of a console.log(object) to a file?
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console.save = function(data, filename){
if(!data) {
console.error('Console.save: No data')
return;
}
if(!filename) filename = 'console.json'
if(typeof data === "object"){
data = JSON.stringify(data, undefined, 4)
}
var blob = new Blob([data], {ty...
How to avoid “too many parameters” problem in API design?
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Is there a zip-like function that pads to longest length in Python?
Is there a built-in function that works like zip() but that will pad the results so that the length of the resultant list is the length of the longest input rather than the shortest input?
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How to make Regular expression into non-greedy?
...regex into my work and result is : invalid quantifier +\]) [Break on this error] var filterdata = takedata.match(/(\[[^\]]++\])/);\n (firebugs + Firefox) something wrong ?
– Rueta
May 13 '10 at 4:08
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