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Is onload equal to readyState==4 in XMLHttpRequest?
... confuse about the xhr return event, as I can tell, there are not so much different between onreadystatechange --> readyState == 4 and onload, is it true?
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“ImportError: No module named” when trying to run Python script
...ings, a python script. I get a ImportError: No module named ..., however, if I launch ipython and import the same module in the same way through the interpreter, the module is accepted.
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what is the difference between 'transform' and 'fit_transform' in sklearn
...he .transform method is meant for when you have already computed PCA, i.e. if you have already called its .fit method.
In [12]: pc2 = RandomizedPCA(n_components=3)
In [13]: pc2.transform(X) # can't transform because it does not know how to do it.
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How to find third or nth maximum salary from salary table?
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Use ROW_NUMBER(if you want a single) or DENSE_RANK(for all related rows):
WITH CTE AS
(
SELECT EmpID, EmpName, EmpSalary,
RN = ROW_NUMBER() OVER (ORDER BY EmpSalary DESC)
FROM dbo.Salary
)
SELECT EmpID, EmpName, EmpSalar...
Differences between Microsoft .NET 4.0 full Framework and Client Profile
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What's new in .NET Framework 4 Client Profile RTM explains many of the differences:
When to use NET4 Client Profile and when to use NET4 Full Framework?
NET4 Client Profile:
Always target NET4 Client Profile for all your client desktop applications (including Windows Forms and WPF apps).
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Defining and using a variable in batch file
...e. So the variable you’ve created can be referenced with %location %. If that’s not what you want, remove the extra space(s) in the definition.
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How do I convert a byte array to Base64 in Java?
...().decode(encoded);
println(new String(decoded)) // Outputs "Hello"
Or if you just want the strings:
String encoded = Base64.getEncoder().encodeToString("Hello".getBytes());
println(encoded); // Outputs "SGVsbG8="
String decoded = new String(Base64.getDecoder().decode(encoded.getBytes()));
pr...
Difference between setTimeout with and without quotes and parentheses
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i think the setTimeout function that you write is not being run.
if you use jquery, you can make it run correctly by doing this :
function alertMsg() {
//your func
}
$(document).ready(function() {
setTimeout(alertMsg,3000);
// the function you called by ...
How do I trim whitespace from a string?
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Just one space, or all consecutive spaces? If the second, then strings already have a .strip() method:
>>> ' Hello '.strip()
'Hello'
>>> ' Hello'.strip()
'Hello'
>>> 'Bob has a cat'.strip()
'Bob has a cat'
>>> ' Hello '.strip()...
How to overwrite existing files in batch?
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enclose your arguments inside "'s. If you have a " inside an argument which is enclosed (which is never the case for filenames) double it.
– Benoit
Oct 29 '10 at 11:33
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