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What are the downsides to using Dependency Injection? [closed]
I'm trying to introduce DI as a pattern here at work and one of our lead developers would like to know: What - if any - are the downsides to using the Dependency Injection pattern?
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How to select a single field for all documents in a MongoDB collection?
...have a student collection with 10 records having fields name and roll . One record of this collection is:
19 Answers
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#pragma pack effect
I was wondering if someone could explain to me what the #pragma pack preprocessor statement does, and more importantly, why one would want to use it.
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How does a public key verify a signature?
... the signer has (or should have) that is where the trust comes from. EVERYONE has (or should have) access to the signer's public key.
So, to validate a digital signature, the recipient
Calculates a hash of the same data (file, message, etc.),
Decrypts the digital signature using the sender's...
What is the easiest way to initialize a std::vector with hardcoded elements?
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One method would be to use the array to initialize the vector
static const int arr[] = {16,2,77,29};
vector<int> vec (arr, arr + sizeof(arr) / sizeof(arr[0]) );
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How does one make random number between range for arc4random_uniform()?
...al extension of either Int or Range. I would simply add this as a stand-alone function in a utilities file.
– Vince O'Sullivan
Nov 16 '15 at 9:31
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Unix command to prepend text to a file
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In one line and in the original text file! This is the correct simple answer. I suggest the additional new line \n echo -e "to be prepended\n$(cat text.txt)" > text.txt
– VincentPerrin.com
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Set Focus on EditText
...ost focus, a method is called, which checks the value of the EditText with one in the database. If the return-value of the method is true, a toast is shown and the focus should get back on the EditText again. The focus should always get back on the EditText and the keyboard should show, until the re...
How can I represent an 'Enum' in Python?
...:
ant = 1
bee = 2
cat = 3
dog = 4
In earlier versions, one way of accomplishing enums is:
def enum(**enums):
return type('Enum', (), enums)
which is used like so:
>>> Numbers = enum(ONE=1, TWO=2, THREE='three')
>>> Numbers.ONE
1
>>> Numbers.TWO
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When someone writes a new programming language, what do they write it IN?
...e code". A program consisting entirely of binary numbers that are a direct one-to-one correspondence with the raw language of the computer itself.
But it still doesn't end. Even a file with just raw numbers in it still needs translation. You still need to get those raw numbers in a file into the co...