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Age from birthdate in python
...etime
import dateutil
def birthday(date):
# Get the current date
now = datetime.datetime.utcnow()
now = now.date()
# Get the difference between the current date and the birthday
age = dateutil.relativedelta.relativedelta(now, date)
age = age.years
return age
...
top -c command in linux to filter processes listed based on processname
...ilter the processes by username by using the option -u but I am wondering if there is any easy way to filter the processes based on processname listed under COMMAND column of the top output.
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Detect network connection type on Android
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If the problem is to find whether the phone's network is connected and fast enough to meet your demands you have to handle all the network types returned by getSubType().
It took me an hour or two to research and write this ...
Python list subtraction operation
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Use a list comprehension:
[item for item in x if item not in y]
If you want to use the - infix syntax, you can just do:
class MyList(list):
def __init__(self, *args):
super(MyList, self).__init__(args)
def __sub__(self, other):
return self.__c...
Where is my Django installation?
...top answer doesn't work, at least on linux.
From the Django tutorial:
If you have difficulty finding where the Django source files are
located on your system, run the following command:
python -c "
import sys
sys.path = sys.path[1:]
import django
print(django.__path__)"
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Which @NotNull Java annotation should I use?
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package javax.annotation;
@TypeQualifierNickname
@Nonnull(when = When.UNKNOWN)
@Retention(RUNTIME)
public @interface Nullable {}
package org.checkerframework.checker.nullness.qual;
@Retention(RUNTIME)
@Target({TYPE_USE, TYPE_PARAMETER})
@SubtypeOf({})
@ImplicitFor(
literals = {LiteralKind....
Filter rows which contain a certain string
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option 1 is to know for sure that dplyr loaded last. option 2 is you prefix dplyr::filter.
– userJT
Mar 1 '16 at 14:30
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Principal component analysis in Python
...o 90 %, 95 % ...
p.npc: number of principal components,
e.g. 2 if the top 2 eigenvalues are >= `fraction` of the total.
It's ok to change this; methods use the current value.
Methods:
The methods of class PCA transform vectors or arrays of e.g.
20 variables, 2 princip...
How to declare a global variable in JavaScript?
...ct to define internal stuff for the plugin:
$.miniMenu.i = new Object();
Now I can just do $.miniMenu.i.globalVar = 3 or $.miniMenu.i.parseSomeStuff = function(...) {...} whenever I need to save something globally, and I still keep it out of the global namespace.
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Calling constructors in c++ without new
...
Both lines are in fact correct but do subtly different things.
The first line creates a new object on the stack by calling a constructor of the format Thing(const char*).
The second one is a bit more complex. It essentially does the following
Create an object of...