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Can I add a UNIQUE constraint to a PostgreSQL table, after it's already created?
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select <column> from <table> group by 1 having count(*) > 1; will give a report on duplicated values.
– Jasen
Aug 26 '16 at 22:57
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Dynamically changing font size of UILabel
...stsFontSizeToFitWidth = true;
2 - Using UILabel Attributes inspector
i- Select your label- Set number of lines 1.
ii- Autoshrink- Select Minimum Font Scale from drop down
iii- Set Minimum Font Scale value as you wish , I have set 0.7 as in below image. (default is 0.5)
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How to change the output color of echo in Linux
...use different numbers, not given here.
Text mode commands
tput bold # Select bold mode
tput dim # Select dim (half-bright) mode
tput smul # Enable underline mode
tput rmul # Disable underline mode
tput rev # Turn on reverse video mode
tput smso # Enter standout (bold) mode
tput...
String formatting in Python 3
...ith decimal integer format.
There are many others things you can do when selecting an argument (using named arguments instead of positional ones, accessing fields, etc) and many format options as well (padding the number, using thousands separators, showing sign or not, etc). Some other examples:
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Why do people say there is modulo bias when using a random number generator?
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Keep selecting a random is a good way to remove the bias.
Update
We could make the code fast if we search for an x in range divisible by n.
// Assumptions
// rand() in [0, RAND_MAX]
// n in (0, RAND_MAX]
int x;
// Keep searc...
Remove rows with duplicate indices (Pandas DataFrame and TimeSeries)
...that was True False and vice-versa. In this case, that means that we will select out the ones that are not duplicated according to the method.
– n8yoder
Feb 27 at 2:35
1
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Eclipse IDE for Java - Full Dark Theme
...sor is black - is there anyway to change it to white so it is visible when selecting code?
– Filth
May 28 '14 at 5:34
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Partly cherry-picking a commit with Git
...t into unstaged working changes.
Now git stash save --patch: interactively select unwanted material to stash.
Git rolls back the stashed changes from your working copy.
git commit
Throw away the stash of unwanted changes: git stash drop.
Tip: if you give the stash of unwanted changes a name: git ...
Authentication issue when debugging in VS2013 - iis express
...4 to get the project properties when you have the top level of the project selected. Do not right click on the project and select properties, this is something entirely different.
Change Anonymous Authentication to be Disabled and Windows Authentication to be Enabled.
Works like gravy :)
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How to add title to subplots in Matplotlib?
...set_title can be used to set title, once the proper axes(ax) or subplot is selected.
import matplotlib.pyplot as plt
fig, ax = plt.subplots(2, 2, figsize=(6, 8))
for i in range(len(ax)):
for j in range(len(ax[i])):
## ax[i,j].imshow(test_images_gr[0].reshape(28,28))
ax[...