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Change column type from string to float in Pandas

I want to convert a table, represented as a list of lists, into a Pandas DataFrame . As an extremely simplified example: 9...
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REST API - why use PUT DELETE POST GET?

So, I was looking through some articles on creating REST API's. And some of them suggest using all types of HTTP requests: like PUT DELETE POST GET . We would create for example index.php and write API this way: ...
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Displaying the build date

... have an app displaying the build number in its title window. That's well and good except it means nothing to most of the users, who want to know if they have the latest build - they tend to refer to it as "last Thursday's" rather than build 1.0.8.4321. ...
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Restoring MySQL database from physical files

... this is true only for MyISAM tables. InnoDB stores its tables and indexes in a single tablespace *, which by default consist of the 3 files ibdata1, ib_logfile0, and ib_logfile1. for restoring a database, you would also need those files. * per-table tablespaces are possible, but not de...
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Div width 100% minus fixed amount of pixels

...hout using tables or JavaScript? The white borders represent edges of divs and aren't relevant to the question. 10 Answers ...
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Why is null an object and what's the difference between null and undefined?

...n short; undefined is where no notion of the thing exists; it has no type, and it's never been referenced before in that scope; null is where the thing is known to exist, but it's not known what the value is. One thing to remember is that null is not, conceptually, the same as false or "" or such, e...
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Playing .mp3 and .wav in Java?

How can I play an .mp3 and a .wav file in my Java application? I am using Swing. I tried looking on the internet, for something like this example: ...
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What does “hashable” mean in Python?

...ue which never changes during its lifetime (it needs a __hash__() method), and can be compared to other objects (it needs an __eq__() or __cmp__() method). Hashable objects which compare equal must have the same hash value. Hashability makes an object usable as a dictionary key and a set member...
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Apply a function to every row of a matrix or a data frame

Suppose I have a n by 2 matrix and a function that takes a 2-vector as one of its arguments. I would like to apply the function to each row of the matrix and get a n-vector. How to do this in R? ...
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Internet Explorer 11 detection

...t && !!document.documentMode; // true on IE11 // false on Edge and other IEs/browsers. Original Answer In order to check Ie11 , you can use this : ( tested) (or run this) !(window.ActiveXObject) && "ActiveXObject" in window I have all VMS of IE : Notice : this w...