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The Object.entries() function is an addition to the ECMAscript scpec in Es2017. This allows us to iterate through the properties of an object and read 阅读全文
posted @ 2017-11-29 22:12
Zhentiw
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The Python Standard Library has a lot of modules! To help you get familiar with what's available, here are a selection of our favourite Python Standar 阅读全文
posted @ 2017-11-28 15:50
Zhentiw
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Python allows you to open a file, do operations on it, and automatically close it afterwards using with. In the example above we open a file, perform 阅读全文
posted @ 2017-11-28 15:35
Zhentiw
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Default arguments are a helpful feature, but there is one situation where they can be surprisingly unhelpful. Using a mutable type (like a list or dic 阅读全文
posted @ 2017-11-27 21:53
Zhentiw
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Python provides another useful built-in type: tuples. Tuples are used to store related pieces of information. Consider this example involving latitude 阅读全文
posted @ 2017-11-27 21:48
Zhentiw
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What a Proxy does is handle communication for an Object. To create a proxy object, we use the Proxy constructor - new Proxy();. The proxy constructor 阅读全文
posted @ 2017-11-26 16:08
Zhentiw
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The iterator protocol is used to define a standard way that an object produces a sequence of values. What that really means is you now have a process 阅读全文
posted @ 2017-11-21 15:20
Zhentiw
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Write a function, remove_duplicates that takes a list as its argument and returns a new list containing the unique elements of the original list. The 阅读全文
posted @ 2017-11-21 14:52
Zhentiw
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Let's introduce a new string method, join: Also note thatjoin will trigger an error if we try to join anything other than strings. For example: 阅读全文
posted @ 2017-11-21 14:45
Zhentiw
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In addition to accessing individual elements from a list we can use Python's slicing notation to access a subsequence of a list. Consider this list of 阅读全文
posted @ 2017-11-21 14:02
Zhentiw
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