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Draw on HTML5 Canvas using a mouse
... <canvas id="can" width="400" height="400" style="position:absolute;top:10%;left:10%;border:2px solid;"></canvas>
<div style="position:absolute;top:12%;left:43%;">Choose Color</div>
<div style="position:absolute;top:15%;left:45%;width:10px;height:10px;bac...
Is it possible to declare two variables of different types in a for loop?
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for (auto p = std::make_pair(5, std::string("Hello World")); p.first < 10; ++p.first) {
std::cout << p.second << std::endl;
}
std::make_pair will return the two arguments in a std::pair. The elements can be accessed with .first and .second.
For more than two objects, you'll n...
Is errno thread-safe?
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10
Really? When did they do that? When I was doing C programming, trusting errno was a big problem.
– Paul Tomblin
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Which is more preferable to use: lambda functions or nested functions ('def')?
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108
If you need to assign the lambda to a name, use a def instead. defs are just syntactic sugar f...
Use numpy array in shared memory for multiprocessing
...()
logger.setLevel(logging.INFO)
# create shared array
N, M = 100, 11
shared_arr = mp.Array(ctypes.c_double, N)
arr = tonumpyarray(shared_arr)
# fill with random values
arr[:] = np.random.uniform(size=N)
arr_orig = arr.copy()
# write to arr from different proce...
Get the _id of inserted document in Mongo database in NodeJS
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When should I use cross apply over inner join?
...bleFun(O.name) F
where F.schema_id= O.schema_id
Edit:
Note:
Informix 12.10 xC2+ has Lateral Derived Tables and Postgresql (9.3+) has Lateral Subqueries which can be used to a similar effect.
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Getting Django admin url for an object
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What is time_t ultimately a typedef to?
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