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Test for existence of nested JavaScript object key
...don't want a TypeError because if one of the members is null or undefined, and you try to access a member, an exception will be thrown.
You can either simply catch the exception, or make a function to test the existence of multiple levels, something like this:
function checkNested(obj /*, level1, ...
Manipulating an Access database from Java without ODBC
... .mdb file) from my Java project. I don't want to use the JDBC-ODBC Bridge and the Access ODBC driver from Microsoft because:
...
How to prevent Browser cache for php site
...dd new files css, js or images the browser is loading the same old js, css and image files stored in cache.
5 Answers
...
Reading/parsing Excel (xls) files with Python
...o, be warned that doing this is a real PITA. The number of caveats is huge and the documentation is lacking and annoying. I ran into many weird bugs and gotchas, some of which took many hours to figure out.
UPDATE: For newer .xlsx files, the recommended library for reading and writing appears to be...
Can I use Objective-C blocks as properties?
Is it possible to have blocks as properties using the standard property syntax?
8 Answers
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c# open a new form then close the current form?
...urrent form is disposed together with form2. Therefore you need to hide it and set form2.Closed event to call this.Close().
private void OnButton1Click(object sender, EventArgs e)
{
this.Hide();
var form2 = new Form2();
form2.Closed += (s, args) => this.Close();
form2.Show();
}
...
Where's my JSON data in my incoming Django request?
...cess it further.
Here is an example using JavaScript, jQuery, jquery-json and Django.
JavaScript:
var myEvent = {id: calEvent.id, start: calEvent.start, end: calEvent.end,
allDay: calEvent.allDay };
$.ajax({
url: '/event/save-json/',
type: 'POST',
contentType: 'applicat...
Rename all files in directory from $filename_h to $filename_half?
...
Just use bash, no need to call external commands.
for file in *_h.png
do
mv "$file" "${file/_h.png/_half.png}"
done
Do not add #!/bin/sh
For those that need that one-liner:
for file in *.png; do mv "$file" "${file/_h.png/_half.png}"; done
...
How to create cron job using PHP?
...o write it. I have tried to search from internet, but I still don't understand it well. I want to create a cron job that will execute my code every minute. I'm using PHP to create it. It is not working.
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How can I safely encode a string in Java to use as a filename?
...ng from an external process. I want to use that String to make a filename, and then write to that file. Here's my code snippet to do this:
...