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Simplest way to profile a PHP script
...e, which I haven't tried yet. Seriously, isn't there a modern, updated CLI-based profiling tool for PHP that installs with Homebrew, requires minimal setup and gives easily human-readable output?
– forthrin
Aug 29 '16 at 6:38
...
Read each line of txt file to new array element
...sing, this should do what you're looking for
$lines = file($filename, FILE_IGNORE_NEW_LINES);
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How to print a groupby object
...
Simply do:
grouped_df = df.groupby('A')
for key, item in grouped_df:
print(grouped_df.get_group(key), "\n\n")
This also works,
grouped_df = df.groupby('A')
gb = grouped_df.groups
for key, values in gb.iteritems():
print(df.ix[...
What is the proper way to re-throw an exception in C#? [duplicate]
...n("Not enough room in array to copy elements starting at index given.");
_innerList.CopyTo(array, arrayIndex);
}
That's not the worse code because it's boilerplate and we can probably just copy it from some other implementation of CopyTo where it wasn't a simple pass-through and we had to implem...
What is “the inverse side of the association” in a bidirectional JPA OneToMany/ManyToOne association
...tand:
public class Customer {
// This field doesn't exist in the database
// It is simulated with a SQL query
// "OO speak": Customer owns the orders
private List<Order> orders;
}
public class Order {
// This field actually exists in the DB
// In a purely OO mod...
How do I apply a perspective transform to a UIView?
...xample of this (with code) can be found here, where I've implemented touch-based rotation and scaling on a couple of CALayers, based on an example by Bill Dudney. The newest version of the program, at the very bottom of the page, implements this kind of perspective operation. The code should be re...
find vs find_by vs where
...d are usually replaced with things like this:
Model.all
Model.first
find_by is used as a helper when you're searching for information within a column, and it maps to such with naming conventions. For instance, if you have a column named name in your database, you'd use the following syntax:
Mod...
Memoization in Haskell?
...alling, for example: fix f 123 = 144
We could memoize this by defining:
f_list :: [Int]
f_list = map (f faster_f) [0..]
faster_f :: Int -> Int
faster_f n = f_list !! n
That performs passably well, and replaces what was going to take O(n^3) time with something that memoizes the intermediate r...
iOS start Background Thread
...ou'd probably be better off using Grand Central Dispatch, though:
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
[self getResultSetFromDB:docids];
});
GCD is a newer technology, and is more efficient in terms of memory overhead and lines of code.
Updated w...
What Makes a Good Unit Test? [closed]
... of Writing Tests:
1. Use long, descriptive test method names.
- Map_DefaultConstructorShouldCreateEmptyGisMap()
- ShouldAlwaysDelegateXMLCorrectlyToTheCustomHandlers()
- Dog_Object_Should_Eat_Homework_Object_When_Hungry()
2. Write your tests in an Arrange/Act/Assert style.
While th...