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Why dict.get(key) instead of dict[key]?
...ionary["bogus"]
would raise a KeyError.
If omitted, default_value is None, such that
dictionary.get("bogus") # <-- No default specified -- defaults to None
returns None just like
dictionary.get("bogus", None)
would.
...
How to avoid using Select in Excel VBA
...times in this post, but who's counting. ☺ ...but seriously, it's an easy one to forget when working with variables holding objects. A variant variable doesn't require Set until you assign an object to it. For example, Dim x: x = 1 is okay, but Dim x: x = Sheets("Sheet1") will generate Error 438. ...
Partial Commits with Subversion
Given the case I made two independent changes in one file: eg. added a new method and changed another method.
11 Answer...
Python string class like StringBuilder in C#?
...
There is no one-to-one correlation. For a really good article please see Efficient String Concatenation in Python:
Building long strings in the Python
progamming language can sometimes
result in very slow running code. In
this...
How can I quickly sum all numbers in a file?
...
For a Perl one-liner, it's basically the same thing as the awk solution in Ayman Hourieh's answer:
% perl -nle '$sum += $_ } END { print $sum'
If you're curious what Perl one-liners do, you can deparse them:
% perl -MO=Deparse -n...
App Inventor 2 文本代码块 · App Inventor 2 中文网
...成多个部分并生成结果列表。例如：
用 ,（逗号）拆分 one,two,three,four 返回列表 ["one","two","three","four"]。
用 -potato, 拆分 one-potato,two-potato,three-potato,four 返回列表 ["one","two","three","four"]。
分解（任意）
使用 分隔符(列表) 中的...
Failed to execute 'btoa' on 'Window': The string to be encoded contains characters outside of the La
... this (actually works with SVG source), like:
btoa(unescape(encodeURIComponent(str)))
example:
var imgsrc = 'data:image/svg+xml;base64,' + btoa(unescape(encodeURIComponent(markup)));
var img = new Image(1, 1); // width, height values are optional params
img.src = imgsrc;
If you need to de...
How can I split up a Git commit buried in history?
...
Here's how to do it with Magit.
Say commit ed417ae is the one you want to change; it contains two unrelated changes and is buried under one or more commits. Hit ll to show the log, and navigate to ed417ae:
Then hit r to open the rebase popup
and m to modify the commit at point...
How to add a filter class in Spring Boot?
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How does one know the order in which the filters are applied?
– BeepDog
May 26 '16 at 21:10
7
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Generate random numbers using C++11 random library
...ht wanna just use default_random_engine, according to c++ primer it is the one that the implementation has deemed most useful
– aaronman
Oct 29 '13 at 18:56
3
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