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getting date format m-d-Y H:i:s.u from milliseconds
...es not work on all locales correctly. Some countries like Germany write "0,1234" or "0.1234" instead of ".1234", therefore your code gives following output for me: 2012-07-08 11:14:15.0.889342
– Daniel Marschall
Apr 18 at 13:14
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How to store a dataframe using Pandas
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Pickle works good!
import pandas as pd
df.to_pickle('123.pkl') #to save the dataframe, df to 123.pkl
df1 = pd.read_pickle('123.pkl') #to load 123.pkl back to the dataframe df
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Splitting on first occurrence
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>>> s = "123mango abcd mango kiwi peach"
>>> s.split("mango", 1)
['123', ' abcd mango kiwi peach']
>>> s.split("mango", 1)[1]
' abcd mango kiwi peach'
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Preferred order of writing latitude & longitude tuples in GIS services
.... For example, my hometown of Eugene, Oregon is at approximately N 44.1, W 123.1. If in maps.google.com I enter 44.1 -123.1, it goes to Eugene. If I enter -123.1 44, it tells me it can't find it. Interestingly, though, if I enter 123.1 W 44 N, it figures it out and goes to Eugene, so there is some f...
C# using streams
...sfer the strings to and from the stream as bytes. So
myStreamWriter.Write(123);
will write "123" (three characters '1', '2' then '3') to the stream. If you're dealing with text files (e.g. html), StreamReader and StreamWriter are the classes you would use.
Whereas
myBinaryWriter.Write(123);
w...
Why doesn't JUnit provide assertNotEquals methods?
... 'not equals' cases.
int status = doSomething() ; // expected to return 123
assertTrue("doSomething() returned unexpected status", status != 123 ) ;
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为AppInventor2开发自己的拓展(Extension) - App Inventor 2 拓展 - 清泛IT社区，为创新赋能！
来源中文网文档：https://www.fun123.cn/reference/extensions/aix_dev.html
为什么需要开发拓展？App Inventor 2 是积木式在线安卓开发环境，利用拖拽式的方式实现代码块堆叠，从而完成相应的逻辑。上手很容易，但是由于代码块提供的功能...
Python's “in” set operator
...s, you need to use set operations like issubset():
>>> k
{'ip': '123.123.123.123', 'pw': 'test1234', 'port': 1234, 'debug': True}
>>> set('ip,port,pw'.split(',')).issubset(set(k.keys()))
True
>>> set('ip,port,pw'.split(',')) in set(k.keys())
False
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What does the PHP error message “Notice: Use of undefined constant” mean?
...example, this is OK, since underscores are allowed in variable names:
if (123 === $my_var) {
do_something();
}
But this isn't:
if (123 === $my-var) {
do_something();
}
It'll be interpreted the same as this:
if (123 === $my - var) { // variable $my minus constant 'var'
do_something();
}...
How to print instances of a class using print()?
....it will act the following way in the Python shell:
>>> t = Test(123, 456)
>>> t
<Test a:123 b:456>
>>> print repr(t)
<Test a:123 b:456>
>>> print(t)
From str method of Test: a is 123, b is 456
>>> print(str(t))
From str method of Test: a is ...