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Add string in a certain position in Python
... Adding to this, you could use negative indices to get a position from the right, e.g. s[:-4]
– Reuben L.
Aug 26 '14 at 11:52
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How do I save a UIImage to a file?
If I have a UIImage from an imagePicker, how can I save it to a subfolder in the documents directory?
9 Answers
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Deleting a resource using http DELETE
... all these debates. But that specs has been superseded by RFC 7231. Quoted from RFC 7231, section 4.2.2 Idempotent Methods, emphasis mine:
A request method is considered "idempotent" if the intended EFFECT ON
THE SERVER of multiple identical requests with that method is the
same as the effec...
adding noise to a signal in python
...rmal(0,1,100)
# 0 is the mean of the normal distribution you are choosing from
# 1 is the standard deviation of the normal distribution
# 100 is the number of elements you get in array noise
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How can I filter a date of a DateTimeField in Django?
... docs.python.org/library/datetime.html#datetime-objects using datetime() from datetime module hrs,mins,secs is optional. the second is from a working project with vars replaced, you can look in the docs it's correct
– zalew
Aug 23 '09 at 4:19
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How to detect UI thread on Android?
....currentThread()) {
// On UI thread.
} else {
// Not on UI thread.
}
From API level 23 and up, there's a slightly more readable approach using new helper method isCurrentThread on the main looper:
if (Looper.getMainLooper().isCurrentThread()) {
// On UI thread.
} else {
// Not on UI threa...
git - Find commit where file was added
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How does this work on files that are merged from other branches, but which weren't necessarily added to the branch being merged by the user performing the merge?
– g33kz0r
Jan 22 '14 at 18:47
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IntelliJ IDEA shows errors when using Spring's @Autowired annotation
... class implementation is a @Service or @Component.
Solve it just changing from Error to Warning(Pressing Alt + Enter).
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Constant pointer vs Pointer to constant [duplicate]
... the declaration like this which make it easy to read and understand (read from right to left):
int const *ptr; // ptr is a pointer to constant int
int *const ptr; // ptr is a constant pointer to int
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Pandas percentage of total with groupby
... the sales column by its sum. Copying the beginning of Paul H's answer:
# From Paul H
import numpy as np
import pandas as pd
np.random.seed(0)
df = pd.DataFrame({'state': ['CA', 'WA', 'CO', 'AZ'] * 3,
'office_id': list(range(1, 7)) * 2,
'sales': [np.random.rand...