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Filter dict to contain only certain keys?
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706
Constructing a new dict:
dict_you_want = { your_key: old_dict[your_key] for your_key in your_...
How to empty a list in C#?
...ecrocomment this because some misinformation has been provided here as of 2020.List<T>.Clear properly clears all references which allows the GC to clear the allocs when necessary. new List<T> does NOT do this and is unsuitable in effectively all scenarios
– John
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How to work with complex numbers in C?
...ard Library of Complex Numbers */
int main() {
double complex z1 = 1.0 + 3.0 * I;
double complex z2 = 1.0 - 4.0 * I;
printf("Working with complex numbers:\n\v");
printf("Starting values: Z1 = %.2f + %.2fi\tZ2 = %.2f %+.2fi\n", creal(z1), cimag(z1), creal(z2), cimag(z2));
dou...
How do I provide JVM arguments to VisualVM?
I'm using VisualVM from JDK 1.6.0_26 to profile a Java webapp running under Tomcat, but VisualVM often tells me that it doesn't have enough memory to take a snapshot, and to use the -Xmx switch to provide more memory to Netbeans. The problem is, I'm running VisualVM outside of Netbeans, so how can I...
d3 axis labeling
... .attr("y", 6)
.attr("dy", ".75em")
.attr("transform", "rotate(-90)")
.text("life expectancy (years)");
You can also use a stylesheet to style these labels as you like, either together (.label) or individually (.x.label, .y.label).
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jQuery: Adding two attributes via the .attr(); method
...ttribute, you must always use quotes!
From the jQuery documentation (Sep 2016) for .attr:
Attempting to change the type attribute on an input or button element created via document.createElement() will throw an exception on Internet Explorer 8 or older.
Edit:
For future reference...
To get a sing...
Showing Difference between two datetime values in hours
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120
I think you're confused because you haven't declared a TimeSpan you've declared a TimeSpan? whic...
Why is “if not someobj:” better than “if someobj == None:” in Python?
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190
In the first test, Python try to convert the object to a bool value if it is not already one. Ro...
Remove non-numeric characters (except periods and commas) from a string
...od/full stop as follows:
$testString = '12.322,11T';
echo preg_replace('/[^0-9,.]+/', '', $testString);
The pattern can also be expressed as /[^\d,.]+/
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CSS3 transform not working
I am trying to transform my menu items by rotating them 10 degrees. My CSS works in Firefox but I've failed to replicate the effect in Chrome and Safari. I know IE doesn't support this CSS3 property so that's not a problem.
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