大约有 43,000 项符合查询结果（耗时：0.0348秒） [XML]
What is JNDI? What is its basic use? When is it used?
...t have the JNDI classes and one or more service providers. The Java 2 SDK, v1.3 includes three service providers for the following naming/directory services:
Lightweight Directory Access Protocol (LDAP)
Common Object Request Broker Architecture (CORBA) Common Object Services (COS) name service
...
mongodb count num of distinct values per field/key
...{ $gte: 2 }
}
},
{ $sort : { count : -1} },
{ $limit : 100 }
]);
that give result such as
{ "_id" : "inflammation", "count" : 765 }
{ "_id" : "obesity", "count" : 641 }
{ "_id" : "epidemiology", "count" : 617 }
{ "_id" : "cancer", "count" : 604 }
{ "_id" : "breast cancer", "co...
Importing a CSV file into a sqlite3 database table using Python
...cached_statements parameter. The currently implemented default is to cache 100 statements."""
– John Machin
Jun 17 '10 at 10:25
|
show 1 mor...
How to round float numbers in javascript?
...
This doesn't always work. Take Math.round(1.005*100)/100 for example from MDN
– tybro0103
May 3 '16 at 17:54
7
...
How to pretty-print a numpy.array without scientific notation and with given precision?
...mple:
In [27]: x = np.array([[1.1, 0.9, 1e-6]]*3)
In [28]: print x
[[ 1.10000000e+00 9.00000000e-01 1.00000000e-06]
[ 1.10000000e+00 9.00000000e-01 1.00000000e-06]
[ 1.10000000e+00 9.00000000e-01 1.00000000e-06]]
In [29]: print np.array_str(x, precision=2)
[[ 1.10e+00 9.00e-01...
Less aggressive compilation with CSS3 calc
...es expression inside calc by default since v3.00.
Original answer (Less v1.x...2.x):
Do this:
body { width: calc(~"100% - 250px - 1.5em"); }
In Less 1.4.0 we will have a strictMaths option which requires all Less calculations to be within brackets, so the calc will work "out-of-the-box". This...
Using global variables between files?
...
100
See Python's document on sharing global variables across modules:
The canonical way to sha...
Is there a better way to express nested namespaces in C++ within the header
...(order of magnitude of) symbols in a namespace. say, 1 doesn't make sense, 100 sounds right, 10000 is clearly to much.
TL;DR: It's a tradeoff, and we don't have hard numbers. Play safe, don't overdo in any direction. The "Don't do that" comes merely from the "You have problems with that, I'd hav...
Timeout on a function call
...de
import multiprocessing
import time
# bar
def bar():
for i in range(100):
print "Tick"
time.sleep(1)
if __name__ == '__main__':
# Start bar as a process
p = multiprocessing.Process(target=bar)
p.start()
# Wait for 10 seconds or until process finishes
p.jo...
Python (and Python C API): __new__ versus __init__
...een 0 and size.
class ModularTuple(tuple):
def __new__(cls, tup, size=100):
tup = (int(x) % size for x in tup)
return super(ModularTuple, cls).__new__(cls, tup)
You simply can't do this with __init__ -- if you tried to modify self in __init__, the interpreter would complain th...