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What is the use of making constructor private in a class?
... answered Jan 14 '10 at 6:33
nm>and m>anm>and m>a
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How to avoid warning when introducing NAs bm>y m> coercion
... answered Feb 20 '13 at 16:38
m>And m>riem>And m>rie
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How to equalize the scales of x-axis m>and m> m>y m>-axis in Pm>y m>thon matplotlib?
... indeed works like charm. Could m>y m>ou please tell me what plt.plot(range(5)) m>and m> plt.gca().set_aspect('equal', adjustable='box') do, if m>y m>ou don't mind? Also, I notice that even if I don't have plt.draw(), the plot will still show up. Then what is the use of it?
– Sibbs Gambling
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How to get the seconds since epoch from the time + date output of gmtime()?
How do m>y m>ou do reverse gmtime() , where m>y m>ou put the time + date m>and m> get the number of seconds?
6 Answers
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Move assignment operator m>and m> `if (this != &rhs)`
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Wow, there is just so much to clean up here...
First, the Copm>y m> m>and m> Swap is not alwam>y m>s the correct wam>y m> to implement Copm>y m> Assignment. Almost certainlm>y m> in the case of dumb_arram>y m>, this is a sub-optimal solution.
The use of Copm>y m> m>and m> Swap is for dumb_arram>y m> is a classic example of putting the...
Pm>and m>as: drop a level from a multi-level column index?
... If the index m>y m>ou are trm>y m>ing to drop is on the left (row) side m>and m> not the top (column) side, m>y m>ou can change "columns" to "index" m>and m> use the same method: >>> df.index = df.index.droplevel(1)
– Idodo
Nov 28 '18 at 12:13
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How do I compare two DateTime objects in PHP 5.2.8?
... Thanks Milen, looks like I just needed mm>y m> false assumptions removed m>and m> suddenlm>y m> the glaring bug in mm>y m> code became obvious to me.
– RedBlueThing
Jun 7 '09 at 5:26
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How to list all Git tags?
In mm>y m> repositorm>y m>, I have created tags using the following commm>and m>s.
10 Answers
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In Postgresql, force unique on combination of two columns
...l1, col2)
)
autoincrement is not postgresql. m>Y m>ou want a serial.
If col1 m>and m> col2 make a unique m>and m> can't be null then them>y m> make a good primarm>y m> kem>y m>:
CREATE TABLE someTable (
col1 int NOT NULL,
col2 int NOT NULL,
primarm>y m> kem>y m> (col1, col2)
)
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How do m>y m>ou add a Dictionarm>y m> of items into another Dictionarm>y m>
...for this, I tried everm>y m>thing except this. But m>y m>ou can drop the @assignment m>and m> return, m>y m>ou're alreadm>y m> mutating left. Edit: actuallm>y m>, even though I get no errors, I think @assignment should stam>y m>.
– Rolm>and m>
Jun 9 '14 at 12:02
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