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How to get the file extension in PHP? [duplicate]
...d to use string functions. You can use something that's actually designed for what you want: pathinfo():
$path = $_FILES['image']['name'];
$ext = pathinfo($path, PATHINFO_EXTENSION);
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Is there a cross-browser onload event when clicking the back button?
For all major browsers (except IE), the JavaScript onload event doesn’t fire when the page loads as a result of a back button operation — it only fires when the page is first loaded.
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Handle Guzzle exception and get HTTP body
I would like to handle errors from Guzzle when the server returns 4xx and 5xx status codes. I make a request like this:
5 A...
How to create a protocol with methods that are optional?
...s defined in the iPhone SDK, such as the UIActionSheetDelegate protocol for example.
5 Answers
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Filtering a list of strings based on contents
...as follows:
>>> lst = ['a', 'ab', 'abc', 'bac']
>>> [k for k in lst if 'ab' in k]
['ab', 'abc']
Another way is to use the filter function. In Python 2:
>>> filter(lambda k: 'ab' in k, lst)
['ab', 'abc']
In Python 3, it returns an iterator instead of a list, but you c...
How to change the playing speed of videos in HTML5?
...
According to this site, this is supported in the playbackRate and defaultPlaybackRate attributes, accessible via the DOM. Example:
/* play video twice as fast */
document.querySelector('video').defaultPlaybackRate = 2.0;
docume...
Best practice to return errors in ASP.NET Web API
I have concerns on the way that we returns errors to client.
11 Answers
11
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postgresql - add boolean column to table set default
...iv_user" BOOLEAN NOT NULL DEFAULT FALSE;
UPDATE: following is only true for versions before postgresql 11.
As Craig mentioned on filled tables it is more efficient to split it into steps:
ALTER TABLE users ADD COLUMN priv_user BOOLEAN;
UPDATE users SET priv_user = 'f';
ALTER TABLE users ALTER CO...
Passing a function with parameters as a parameter?
...ction(){ return changeViewMode(myvar); });
This creates an anonymous temporary function wrapper that knows about the parameter and passes it to the actual callback implementation.
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Using python “with” statement with try-except block
...ry:
line = f.readline()
finally:
f.close()
except IOError:
<whatever>
As you can see, the with statement can make things less error prone. In newer versions of Python (2.7, 3.1), you can also combine multiple expressions in one with statement. For example:
with open(...