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String literals and escape characters in postgresql
...to the SQL standard. An escape string constant is specified by writing the letter E (upper or lower case) just before the opening single quote, e.g. E'foo'. (When continuing an escape string constant across lines, write E only before the first opening quote.) Within an escape string, a backslash cha...
How to merge dictionaries of dictionaries?
... to the original question:
I've had to remove the curly braces around the letters and put them in single quotes for this to be legit Python (else they would be set literals in Python 2.7+) as well as append a missing brace:
dict1 = {1:{"a":'A'}, 2:{"b":'B'}}
dict2 = {2:{"c":'C'}, 3:{"d":'D'}}
an...
How to return smart pointers (shared_ptr), by reference or by value?
...e to one, and I would be very hesitant to pass them around by reference or raw pointer. Why? Because you cannot be certain that it will not be shallow-copied via a reference later. Your first point defines the reason why this should be a concern. This can happen even in a single-threaded environment...
I need this baby in a month - send me nine women!
...poster.
However, if your project is to stuff envelopes with ready-printed letters (like You MIGHT have won!) then the more people you add, the faster it goes. There is some overhead in doling out stacks of work, so you can't get benefits up to the point where you have one person pr. envelope, but y...
Reading binary file and looping over each byte
...eeded.
Python 3
In Python 3, it's a bit different. We will no longer get raw characters from the stream in byte mode but byte objects, thus we need to alter the condition:
with open("myfile", "rb") as f:
byte = f.read(1)
while byte != b"":
# Do stuff with byte.
byte = f.re...
Converting JSON String to Dictionary Not List
...imilar projects.
I extract data from an URL using a POST request and the raw output is JSON. For some reason the output is already a dictionary, not a list, and I'm able to refer to the nested dictionary keys right away, like this:
datapoint_1 = json1_data['datapoints']['datapoint_1']
where dat...
AES Encryption for an NSString on the iPhone
... it's transmittable without being disturbed in transit, rather than return raw data.
– Volomike
Jan 17 '16 at 1:24
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show 1 more comment
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Regular expression for first and last name
...{3,30}\s*)+"
If you need the whole first name part to be shorter than 30 letters, you need to check that seperately, I think. The expression ".{3,30}" should do that.
Why doesn't Objective-C support private methods?
.../Conceptual/…. The recommended alternative is to prefix with two capital letters and then an underscore.
– dreamlax
Jan 29 '10 at 0:06
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Select by partial string from a pandas DataFrame
...
@00schneider r in this case is used to indicate a raw string literal. These make it easier to write regular expression strings. stackoverflow.com/q/2081640
– cs95
Aug 13 '19 at 13:11
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