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Error: “dictionary update sequence element #0 has length 1; 2 is required” on Django 1.4
...;
If you give the sequence and any element length is 1 and required two then we will get this kind of error.
See the above code. First time I gave the sequence with tuple and it's length 1, then we got the error and dictionary is not updated. second time I gave inside tuple with with two element...
Can an interface extend multiple interfaces in Java?
...implements A, B {
@Override
public void test() {
}
}
Then single implementation works for both :).
Read my complete post here:
http://codeinventions.blogspot.com/2014/07/can-interface-extend-multiple.html
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Split function equivalent in T-SQL?
...b > a
)
SELECT SUBSTRING(@str, a,
CASE WHEN b > LEN(@delimiter)
THEN b - a - LEN(@delimiter)
ELSE LEN(@str) - a + 1 END) value
FROM cte WHERE a > 0
Many more ways of doing the same is here How to split comma delimited string?
...
How can I define colors as variables in CSS?
...d: /*bbg*/#567890; border: 2px solid /*bb*/#abcdef; color:/*bt*/#123456}
Then to, for example, change the colour scheme for the box text you do a find/replace on
/*bt*/#123456
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Transposing a NumPy array
...D" arrays are 2D.)
If you want to turn your 1D vector into a 2D array and then transpose it, just slice it with np.newaxis (or None, they're the same, newaxis is just more readable).
import numpy as np
a = np.array([5,4])[np.newaxis]
print(a)
print(a.T)
Generally speaking though, you don't ever ...
Installing R on Mac - Warning messages: Setting LC_CTYPE failed, using “C”
...N repos. cran.r-project.org/mirrors.html select a mirror that fits you and then pick packages you want to install, it should be pretty straightforward! Good luck!
– nemesis
Feb 11 '14 at 21:27
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Failed to import new Gradle project: failed to find Build Tools revision *.0.0
...t; System Settings > Android SDK
click on the tab SDK Tools at the top. Then highlight Android SDK Build Tools from the list.
Check "Show Package Details" check box, choose the build tools version you need and then click Apply.
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EJB's - when to use Remote and/or local interfaces?
...as well.
If your design relies on EJB methods changing passed-in objects, then it would be tricky for you to "switch to remote" later; perhaps even impossible.
Good luck.
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Binary search (bisection) in Python
...g thing in a sorted lists (which is where a binary search would help), and then just checking for existence, you're incurring (worst-case, unless specified):
Sorted Lists
O( n log n) to initially create the list (if it's unsorted data. O(n), if it's sorted )
O( log n) lookups (this is the binary...
Hidden features of Android development?
...ul to have plenty of sample apps written by Googlers to build, examine and then see how they did it.
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answered Nov 3 '09 at 22:33
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