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Casting vs using the 'as' keyword in the CLR
...1,specs: OS:Windows Seven, CPU:i5-520M, 4GB of DDR3 1033 ram, benchmark on array of 128,000,000 items.
– Behrooz
Jun 25 '10 at 13:32
2
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How do I create a simple 'Hello World' module in Magento?
...ethods/variables on the fly. For example you'll see it used as a glorified array to pass data from one method to another.
During development make sure you caching is disabled. It'll make magento excruciatingly slow, but it'll save you a lot of head trauma (from banging it on your desk).
You'll se...
How do I perform an insert and return inserted identity with Dapper?
... but if I pass in a collection I get An enumerable sequence of parameters (arrays, lists, etc) is not allowed in this context
– MaYaN
Mar 15 '17 at 11:19
add a comment
...
Strangest language feature
...
In C, arrays can be indexed like so:
a[10]
which is very common.
However, the lesser known form (which really does work!) is:
10[a]
which means the same as the above.
...
How to count items in a Go map?
...n(s) string type string length in bytes
[n]T, *[n]T array length (== n)
[]T slice length
map[K]T map length (number of defined keys)
chan T number of elements queued in channel buffer
Here are a couple examples po...
What is the difference between Python's list methods append and extend?
...ctionary, it will append the key, and not the whole hash to the end of the array.
– Anthony
Mar 15 '19 at 14:53
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show 1 more comment
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Lock-free multi-threading is for real threading experts
...ou do not have dedicated locks - instead you treat e.g. all elements in an array or all nodes in a linked list as a "spin-lock". You read, modify and try to update if there was no update since your last read. If there was, you retry.
This makes your "locking" (oh, sorry, non-locking :) very fine gra...
Update a dataframe in pandas while iterating row by row
....21
pd.DataFrame.ix is deprecated
pd.DataFrame.loc is fine but can work on array indexers and you can do better
My recommendation
Use pd.DataFrame.at
for i in df.index:
if <something>:
df.at[i, 'ifor'] = x
else:
df.at[i, 'ifor'] = y
You can even change this to:
fo...
How do I return multiple values from a function in C?
...is doing. If we know what kind of result the function stuffs into the char array, we could just allocate enough space for it and pass it to the function. No need of passing the length. Something similar to how we use strcpy for example.
– codaddict
Apr 12 '10 a...
mongoDB/mongoose: unique if not null
... support for specifying multiple possible types, which can be passed as an array:
{ field: { $type: [ <BSON type1> , <BSON type2>, ... ] } }
which means that it allows the value to be of any of a number of multiple types when not null.
Therefore, if we want to allow the email field i...