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What's better at freeing memory with PHP: unset() or $var = null
... interesting to know if one is better than the other. I have been using unset() for most of my coding, but I've recently looked through a few respectable classes found off the net that use $var = null instead.
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How do I iterate through children elements of a div using jQuery?
... editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
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Best way to get application folder path
... probably be the assembly download cache. CodeBase is not guaranteed to be set for assemblies in the GAC.
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How to Generate unique file names in C#
... finds one that doesn't exist. It reads the existing filenames into a HashSet to check for collisions so it's pretty quick (a few hundred filenames per second on my machine), it's thread safe too, and doesn't suffer from race conditions.
For example, if you pass it test.txt, it will attempt to cre...
Prepend a level to a pandas MultiIndex
...el to the columns by adding axis=1, since the df.columns doesn't have the "set_index" method like the index, which always bugs me.
– Rutger Kassies
Feb 10 '17 at 12:32
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How to disable all caps menu titles in Visual Studio
... SuppressUppercaseConversion
Value: 1
In PowerShell, you can run this to set that registry key and the uppercase goes away.
Set-ItemProperty -Path HKCU:\Software\Microsoft\VisualStudio\11.0\General -Name SuppressUppercaseConversion -Type DWord -Value 1
Visual Studio Express 2012
The above regi...
Matplotlib scatterplot; colour as a function of a third variable
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There's no need to manually set the colors. Instead, specify a grayscale colormap...
import numpy as np
import matplotlib.pyplot as plt
# Generate data...
x = np.random.random(10)
y = np.random.random(10)
# Plot...
plt.scatter(x, y, c=y, s=500)
plt.g...
WARNING: UNPROTECTED PRIVATE KEY FILE! when trying to SSH into Amazon EC2 Instance
I'm working to set up Panda on an Amazon EC2 instance.
I set up my account and tools last night and had no problem using SSH to interact with my own personal instance, but right now I'm not being allowed permission into Panda's EC2 instance.
Getting Started with Panda
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How to find the sum of an array of numbers
Given an array [1, 2, 3, 4] , how can I find the sum of its elements? (In this case, the sum would be 10 .)
43 Answers
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How do I open the SearchView programmatically?
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Expand the SearchView with
searchView.setIconified(false);
and collapse it with
searchView.setIconified(true);
You need to change the value of android:showAsAction from ifRoom|collapseActionView to always. The SearchView's attribute android:iconifiedByDefaul...