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What are the best practices for catching and re-throwing exceptions?
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What is the most efficient way to create a dictionary of two pandas Dataframe columns?
...lues,index=df.Position).to_dict()
Out[9]: {1: 'a', 2: 'b', 3: 'c', 4: 'd', 5: 'e'}
Speed comparion (using Wouter's method)
In [6]: df = pd.DataFrame(randint(0,10,10000).reshape(5000,2),columns=list('AB'))
In [7]: %timeit dict(zip(df.A,df.B))
1000 loops, best of 3: 1.27 ms per loop
In [8]: %time...
How to read the RGB value of a given pixel in Python?
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answered Sep 26 '08 at 8:15
Dave WebbDave Webb
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In PHP, why does not show a parse error?
...t recommended)
<% ... %> (deprecated and removed ASP-style tag after 5.3.0)
Apparently, you can open a PHP block one way, and close it the other. Didn't know that.
So in your code, you opened the block using <? but PHP recognizes </script> as the closer. What happened was:
<?ph...
How do I convert from int to String?
...c class TestClass {
public static void main(String[] args) {
int i = 5;
String strI = "" + i;
}
}
simon@lucifer:~$ javac TestClass.java && javap -c TestClass
Compiled from "TestClass.java"
public class TestClass extends java.lang.Object{
public TestClass();
Code:
0: aload...
How do you delete all text above a certain line
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Using usort in php with a class private function
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Inheriting constructors
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edited Jan 30 '19 at 16:05
answered Jan 12 '09 at 8:19
Sum...
mysql create user if not exists
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In 5.7.6 and above, you should be able to use CREATE USER
CREATE USER IF NOT EXISTS 'user'@'localhost' IDENTIFIED BY 'password';
Note that the 5.7.6 method doesn't actually grant any permissions.
If you aren't using a vers...