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Maximum size of an Array in Javascript
...
No need to trim the array, simply address it as a circular buffer (index % maxlen). This will ensure it never goes over the limit (implementing a circular buffer means that once you get to the end you wrap around to the beginning again - not possible to overrun the end of the array).
For ex...
How to split last commit into two in Git
...
You should use the index. After doing a mixed reset ("git reset HEAD^"), add
the first set of changes into the index, then commit them. Then commit the
rest.
You can use "git add" to put all changes made in a file to the index. If you
don't wa...
Different ways of adding to Dictionary
...can check this out by opening the class in Reflector.net
This is the This indexer:
public TValue this[TKey key]
{
get
{
int index = this.FindEntry(key);
if (index >= 0)
{
return this.entries[index].value;
}
ThrowHelper.ThrowKeyNotFound...
What are the advantages of NumPy over regular Python lists?
...h cells are above a threshold:
(x > 0.5).nonzero()
Remove every even-indexed slice along the third dimension:
x[:, :, ::2]
Also, many useful libraries work with NumPy arrays. For example, statistical analysis and visualization libraries.
Even if you don't have performance problems, learni...
Why can't Python parse this JSON data?
...onaries, dictionaries of lists.
You can find ujson in the Python package index and the API is almost identical to Python's built-in json library.
ujson is also much faster if you're loading larger JSON files. You can see the performance details in comparison to other Python JSON libraries in the...
Is there a “previous sibling” selector?
...ing selector can be simulated in CSS using the flex order property.
The z-index Myth
Another long-standing belief has been that z-index works only on positioned elements.
In fact, the most current version of the spec – the W3C Editor's Draft – still asserts this to be true:
9.9.1 Specifyi...
Split string in Lua?
...ch() or string.sub() methods. Use the string.sub() method if you know the index you wish to split the string at, or use the string.gmatch() if you will parse the string to find the location to split the string at.
Example using string.gmatch() from Lua 5.1 Reference Manual:
t = {}
s = "from=wor...
MyISAM versus InnoDB [closed]
...
InnoDB has full text indexes in MySQL 5.6, but so far, they aren't really ready for production use.
– Bill Karwin
Jul 17 '13 at 17:39
...
Changing names of parameterized tests
...estring is a string, which can have the following special placeholders:
{index} - the index of this set of arguments. The default namestring is {index}.
{0} - the first parameter value from this invocation of the test.
{1} - the second parameter value
and so on
The final name of the test will b...
Rails migration for has_and_belongs_to_many join table
...ll => false
t.references :orange, :null => false
end
# Adding the index can massively speed up join tables. Don't use the
# unique if you allow duplicates.
add_index(:apples_oranges, [:apple_id, :orange_id], :unique => true)
If you use the :unique => true on the index, then you shou...