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OpenSuSE 安装bpftrace - 操作系统(内核) - 清泛网移动版 - 专注C/C++及内核技术
....\n", pid); }'
trace processes calling sleep
bpftrace -e 'tracepoint:raw_syscalls:sys_enter { @[comm] = count(); }'
count syscalls by process name
--End--bpftrace bpf
OpenSuSE 安装bpftrace - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
....\n", pid); }'
trace processes calling sleep
bpftrace -e 'tracepoint:raw_syscalls:sys_enter { @[comm] = count(); }'
count syscalls by process name
--End--bpftrace bpf
How to remove gaps between subplots in matplotlib?
...date(wspace=0.025, hspace=0.05) # set the spacing between axes.
for i in range(16):
# i = i + 1 # grid spec indexes from 0
ax1 = plt.subplot(gs1[i])
plt.axis('on')
ax1.set_xticklabels([])
ax1.set_yticklabels([])
ax1.set_aspect('equal')
plt.show()
...
initialize a numpy array
...ollows :
import numpy as np
big_array = [] # empty regular list
for i in range(5):
arr = i*np.ones((2,4)) # for instance
big_array.append(arr)
big_np_array = np.array(big_array) # transformed to a numpy array
of course your final object takes twice the space in the memory at the creatio...
vector::at vs. vector::operator[]
...exceptional)...and bugs in the code (dereferencing iterator that is out of range is exceptional thing)
– Bojan Komazec
Feb 21 '12 at 10:52
...
What is the difference between a strongly typed language and a statically typed language?
...time error. Weak: "c" + True = "b" or "d" because everything is treated as raw bytes. Strong: C#, Ruby, C++ Weak: Assembly, C (due to implicit void pointers)
– Jonathan Allen
Apr 23 '10 at 5:27
...
Cartesian product of x and y array points into single array of 2D points
... cartesian_product_recursive(arrays[1:], out=out[0:m,1:])
for j in range(1, arrays[0].size):
out[j*m:(j+1)*m,1:] = out[0:m,1:]
return out
def cartesian_product_itertools(*arrays):
return numpy.array(list(itertools.product(*arrays)))
### Test code ###
name_func = [('rep...
Convert pandas timezone-aware DateTimeIndex to naive timestamp, but in certain timezone
...handling-improvements
So with my example from above:
In [4]: t = pd.date_range(start="2013-05-18 12:00:00", periods=2, freq='H',
tz= "Europe/Brussels")
In [5]: t
Out[5]: DatetimeIndex(['2013-05-18 12:00:00+02:00', '2013-05-18 13:00:00+02:00'],
dtyp...
PostgreSQL - max number of parameters in “IN” clause?
...esql jdbc driver:
Caused by: java.io.IOException: Tried to send an out-of-range integer as a 2-byte value: 100000
at org.postgresql.core.PGStream.SendInteger2(PGStream.java:201)
share
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improv...
Sorting an IList in C#
...unt, comparer);
}
else
{
List<T> range = new List<T>(count);
for (int i = 0; i < count; i++)
{
range.Add(list[index + i]);
}
range.Sort(comparer);
Copy(range, 0, list, index...