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Select Row number in postgres
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You should also specify an order in OVER clause: OVER (ORDER BY id). Otherwise the order is not guaranteed.
– AlexM
Jun 14 '16 at 4:30
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TypeError: $.ajax(…) is not a function?
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Double-check if you're using full-version of jquery and not some slim version.
I was using the jquery cdn-script link that comes with jquery. The problem is this one by default is slim.jquery.js which doesn't have the ajax function in it...
Objective-C class -> string like: [NSArray className] -> @“NSArray”
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@MattDiPasquale: NSClassFromString works a bit differently. Since all of the class names exist somewhere in the Objective-C runtime, NSClassFromString takes the string and explores the list of classes maintained by the runtime looking for the class that has the given name....
Plotting a list of (x, y) coordinates in python matplotlib
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If you have a numpy array you can do this:
import numpy as np
from matplotlib import pyplot as plt
data = np.array([
[1, 2],
[2, 3],
[3, 6],
])
x, y = data.T
plt.scatter(x,y)
plt.show()
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How do I install g++ for Fedora?
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g++ is like an aditional for gcc, so if you want g++ the package you need is gcc-c++, try it...
– Hola Soy Edu Feliz Navidad
Oct 18 '12 at 10:56
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How to add a footer to a UITableView in Storyboard
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Note that you can only do this if you have more than 0 prototype cells specified. Otherwise, the dragged-in view always becomes the header. To fix this, change the number of prototype cells to 1, drag in the view underneath the one prototype cell, then c...
list.clear() vs list = new ArrayList(); [duplicate]
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It's hard to know without a benchmark, but if you have lots of items in your ArrayList and the average size is lower, it might be faster to make a new ArrayList.
http://www.docjar.com/html/api/java/util/ArrayList.java.html
public void clear() {
modCount++;
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Very Long If Statement in Python [duplicate]
I have a very long if statement in Python. What is the best way to break it up into several lines? By best I mean most readable/common.
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find first sequence item that matches a criterion [duplicate]
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If you don't have any other indexes or sorted information for your objects, then you will have to iterate until such an object is found:
next(obj for obj in objs if obj.val==5)
This is however faster than a complete list c...
How to convert java.sql.timestamp to LocalDate (java8) java.time?
...Usually when using only java8 date classes the programmer is forced to specify a timezone which is a good thing.
The good solution is
timestamp.toInstant().atZone(zoneId).toLocalDate()
Where zoneId is the timezone you want to use which is typically either ZoneId.systemDefault() if you want to us...