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TypeScript and field initializers
... address?: string,
age?: number
}) {
if (fields) Object.assign(this, fields);
}
}
or do it manually (bit more safe):
if (fields) {
this.name = fields.name || this.name;
this.address = fields.address || this.address;
this.age = ...
Ruby - elegantly convert variable to an array if not an array already
... the original use of to_a. For instance, {a: 1, b: 2}.each ... would work differently.
– sawa
Aug 21 '13 at 14:15
1
...
How many database indexes is too many?
...
It depends on the operations that occur on the table.
If there's lots of SELECTs and very few changes, index all you like.... these will (potentially) speed the SELECT statements up.
If the table is heavily hit by UPDATEs, INSERTs + DELETEs ... these will be very slow with lots...
Set title background color
...etextcolor">#FFFF00</color>
</resources>
In the AndroidMANIFEST.xml, set the theme attribute either in the application (for the whole application) or in the activity (only this activity) tags
<activity android:name=".CustomTitleBar" android:theme="@style/customTheme" ...
From ...
Unloading classes in java?
...this since the amount of jars that are required to do this are ridiculous (if we wanted to ship them). We also have version problems if we don't load the classes dynamically at run time from the AppServer library.
...
onActivityResult is not being called in Fragment
...
Also note that if you are using nested fragments, the child fragment should call getParentFragment().startActivityForResult so that the parent fragment will have its onActivityResult method called.
– Eric Brynsvold
...
Remove an element from a Bash array
...ippo
$ array=( "${array[@]/$delete}" ) #Quotes when working with strings
If need to delete more than one element:
...
$ delete=(pluto pippo)
for del in ${delete[@]}
do
array=("${array[@]/$del}") #Quotes when working with strings
done
Caveat
This technique actually removes prefixes matching ...
How to run a single test with Mocha?
...Script stuff. My test file contains 5 tests. Is that possible to run a specific test (or set of tests) rather than all the tests in the file?
...
SortedList, SortedDictionary and Dictionary
...nts will be sorted. Not so with Dictionary<T,V>.
MSDN addresses the difference between SortedList<T,V> and SortedDictionary<T,V>:
The SortedDictionary(TKey, TValue) generic class is a binary search
tree with O(log n) retrieval, where n is the number of elements in
the dic...
bool operator ++ and --
...
It comes from the history of using integer values as booleans.
If x is an int, but I am using it as a boolean as per if(x)... then incrementing will mean that whatever its truth value before the operation, it will have a truth-value of true after it (barring overflow).
However, it's impo...