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Is a Python dictionary an example of a hash table?
...le. You can read a description of python's dict implementation, as written by Tim Peters, here.
That's why you can't use something 'not hashable' as a dict key, like a list:
>>> a = {}
>>> b = ['some', 'list']
>>> hash(b)
Traceback (most recent call last):
File "<st...
How do I temporarily disable triggers in PostgreSQL?
...e all trigger modifications much more cheaply after the fact than on a row-by-row basis.
6 Answers
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Which data type for latitude and longitude?
...se table. I will calculate distance between two points, find nearer points by using this location values.
6 Answers
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How to delete all rows from all tables in a SQL Server database?
...work, if adapted somehow?... Because I don't wanna delete all the DBs kept by the SQL server.
– סטנלי גרונן
Nov 10 '16 at 9:45
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s...
The server committed a protocol violation. Section=ResponseStatusLine ERROR
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anyone know why this safety measure is imposed by IIS? It worked, but I don't understand the reason for the restriction on header values (manually setting them in my case).
– emran
Feb 19 '14 at 5:20
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Scala how can I count the number of occurrences in a list
...ple", "oranges", "apple", "banana", "apple", "oranges", "oranges")
s.groupBy(identity).mapValues(_.size)
giving a Map with a count for each item in the original sequence:
Map(banana -> 1, oranges -> 3, apple -> 3)
The question asks how to find the count of a specific item. With this a...
Scanner vs. StringTokenizer vs. String.Split
...give you the simplest API for simply getting an array of strings delimited by a particular expression.
String.split() and Pattern.split() give you an easy syntax for doing the latter, but that's essentially all that they do. If you want to parse the resulting strings, or change the delimiter halfway...
Disable same origin policy in Chrome
...
From the chromium source:
// Don't enforce the same-origin policy. (Used by people testing their sites.)
const wchar_t kDisableWebSecurity[] = L"disable-web-security";
Before Chrome 48, you could just use:
chromium-browser --disable-web-security
...
AttributeError(“'str' object has no attribute 'read'”)
... so it must happen in the json.load function that you called (as indicated by the full traceback). That is because json.load is trying to .read the thing that you gave it, but you gave it jsonofabitch, which currently names a string (which you created by calling .read on the response).
Solution: do...
Increase number of axis ticks
...
You can override ggplots default scales by modifying scale_x_continuous and/or scale_y_continuous. For example:
library(ggplot2)
dat <- data.frame(x = rnorm(100), y = rnorm(100))
ggplot(dat, aes(x,y)) +
geom_point()
Gives you this:
And overriding the sc...