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How to use filter, map, and reduce in Python 3
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You do not need to create extra functions in list comprehensions. Just use [i*i*i for i in range(1,11)]
– Xiao
Jul 22 '14 at 3:25
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How can I initialise a static Map?
...ialiser too:
public class Test {
private static final Map<Integer, String> myMap;
static {
Map<Integer, String> aMap = ....;
aMap.put(1, "one");
aMap.put(2, "two");
myMap = Collections.unmodifiableMap(aMap);
}
}
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How to bind RadioButtons to an enum?
...tType, object parameter, System.Globalization.CultureInfo culture)
{
string parameterString = parameter as string;
if (parameterString == null)
return DependencyProperty.UnsetValue;
if (Enum.IsDefined(value.GetType(), value) == false)
return DependencyProperty.UnsetValue;
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Vim: insert the same characters across multiple lines
... text on every single line in a range you can easily skip them by pressing extra j's.
Note that for large number of contiguous additions, the block approach or macro will likely be superior.
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Getting a slice of keys from a map
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For example,
package main
func main() {
mymap := make(map[int]string)
keys := make([]int, 0, len(mymap))
for k := range mymap {
keys = append(keys, k)
}
}
To be efficient in Go, it's important to minimize memory allocations.
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How to turn on (literally) ALL of GCC's warnings?
...ode that has a different meaning (or doesn't work) in traditional C, e.g. "string " "concatenation", or ISO C function definitions! Do you really care about compatibility with 30 year old compilers? Do you really want a warning for writing int inc(int i) { return i+1; } ?
I think -Weffc++ is too n...
querySelector and querySelectorAll vs getElementsByClassName and getElementById in JavaScript
...e to escape it. (The selector escape character has special meaning in a JS string too, so you have to escape that too).
document.querySelector("#view\\:_id1\\:inputText1")
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getSupportActionBar from inside of Fragment ActionBarCompat
...).
((AppCompatActivity)getActivity()).getSupportActionBar().setSubtitle(R.string.subtitle);
You do need the cast. It's not poor design, it's backwards compatibility.
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Numpy index slice without losing dimension information
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The example is missing extra brackets for the tuple in the assignment to b; it should be b = np.zeros((100,10)).
– Jerzy
Mar 17 '17 at 20:18
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Creating a new user and password with Ansible
...th pip install passlib. Then to be able to use an inline vault encrypted string i had to reformat with the following addition: password: {{ upassword | string | password_hash('sha512') }}. This avoids the error message secret must be unicode or bytes, not ansible.parsing.yaml.objects.AnsibleVaultE...