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Why does Python code use len() function instead of a length method?

...tocol in Python is to implement this method on objects which have a length and use the built-in len() function, which calls it for you, similar to the way you would implement __iter__() and use the built-in iter() function (or have the method called behind the scenes for you) on objects which are it...
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Pandas: Setting no. of max rows

...max_rows: pd.set_option('display.max_rows', 500) For older versions of pandas (<=0.11.0) you need to change both display.height and display.max_rows. pd.set_option('display.height', 500) pd.set_option('display.max_rows', 500) See also pd.describe_option('display'). You can set an option on...
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What's the difference between interface and @interface in java?

...f touch - at any rate I've been working on a small Java project this week, and using Intellij IDEA as my IDE, for a change of pace from my regular .Net development. ...
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ASP.NET: This method cannot be called during the application's pre-start initialization stage

... Can you please expand on that a little? Where in the web.config? What do the keys do? I'm having trouble finding online documentation of those keys. – Kennet Belenky Jan 19 '11 at 19:54 ...
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Why can't I save CSS changes in Firebug? [closed]

...ile (on my local development machine). Unfortunately after searching a lot and not finding anything that suits my needs (OK, there's CSS Updater but you have to register and it's a paid extension...) I gave up on Firefox + Firebug and looked for something similar for Google Chrome. Guess what... I j...
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Getting “net::ERR_BLOCKED_BY_CLIENT” error on some AJAX calls

...OM against expressions, not that this matters in this case). Having rules and expressions that just operate on a tiny bit of text (the URI) is prone to create some false-positives... Besides instructing your users to disable their extensions (at least on your site) you can also get the extension a...
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When a 'blur' event occurs, how can I find out which element focus went *to*?

...work for focus changes caused by tabbing through fields with the keyboard, and does not work at all in Chrome or Safari. The big problem with using activeElement (except in IE) is that it is not consistently updated until after the blur event has been processed, and may have no valid value at all du...
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How to make --no-ri --no-rdoc the default for gem install?

... or RDoc output from the gems I install in my machine or in the servers I handle (I use other means of documentation). 12 A...
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How to trigger a build only if changes happen on particular set of files

...ime (1.15). However, someone posted patches on GitHub that work on Jenkins and Hudson that implement the feature you want. It is a little work to build, but it works as advertised and has been extremely useful since one of my Git trees has multiple independent projects. https://github.com/jenkinsc...
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Formatting Phone Numbers in PHP

I am working on an SMS app and need to be able to convert the sender's phone number from +11234567890 to 123-456-7890 so it can be compared to records in a MySQL database . ...