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Big O of JavaScript arrays
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110
NOTE: While this answer was correct in 2012, engines use very different internal representatio...
How can I add items to an empty set in python
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195
D = {} is a dictionary not set.
>>> d = {}
>>> type(d)
<type 'dict'>...
What is the meaning of the prefix N in T-SQL statements and when should I use it?
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edited May 23 '17 at 12:10
Community♦
111 silver badge
answered Apr 5 '12 at 8:20
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How do I unset an element in an array in javascript?
...rray.
If you know the key you should use splice i.e.
myArray.splice(key, 1);
For someone in Steven's position you can try something like this:
for (var key in myArray) {
if (key == 'bar') {
myArray.splice(key, 1);
}
}
or
for (var key in myArray) {
if (myArray[key] == 'bar...
How exactly does a generator comprehension work?
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147
Do you understand list comprehensions? If so, a generator expression is like a list comprehens...
Convert unix time to readable date in pandas dataframe
... to be seconds since epoch.
In [20]: df = DataFrame(data['values'])
In [21]: df.columns = ["date","price"]
In [22]: df
Out[22]:
<class 'pandas.core.frame.DataFrame'>
Int64Index: 358 entries, 0 to 357
Data columns (total 2 columns):
date 358 non-null values
price 358 non-null value...
Get application version name using adb
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185
adb shell dumpsys package my.package | grep versionName
as mentioned by @david and @Jeremy F...
How to check if object (variable) is defined in R?
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You want exists():
R> exists("somethingUnknown")
[1] FALSE
R> somethingUnknown <- 42
R> exists("somethingUnknown")
[1] TRUE
R>
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Locate the nginx.conf file my nginx is actually using
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answered Nov 11 '13 at 15:38
Daniel LiDaniel Li
13.7k66 gold badges3939 silver badges5858 bronze badges
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Python Matplotlib Y-Axis ticks on Right Side of Plot
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196
Use ax.yaxis.tick_right()
for example:
from matplotlib import pyplot as plt
f = plt.figure(...