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Why 0 is true but false is 1 in the shell?
...ios. A particular example is xargs which uses different error codes in the range around 127 to indicate how a group of commands failed. The conversion which can be done is int to bool where 0 maps to success (which I guess you want to express as true / 1; but realize that this is just another arbitr...
不同品牌的防火墙组成高可靠性集群 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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set protocol ospf
set enable
set area 0.0.0.0 range 172.16.100.0 255.255.255.0 advertise
set area 0.0.0.0 range 172.16.110.0 255.255.255.0 advertise
exit
set interface redundant1.10 protocol ospf area 0.0.0.0
set interface redundant1.10 protocol ospf enable
set inte...
Convert character to ASCII code in JavaScript
...can extend far past 1 byte ASCII values 0-127. Don't assume it is in that range if arbitrary string input is being accepted and handled by javascript.
– theferrit32
Aug 20 '19 at 21:11
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remove_if equivalent for std::map
I was trying to erase a range of elements from map based on particular condition. How do I do it using STL algorithms?
13 A...
How do I determine k when using k-means clustering?
...klearn.cluster import KMeans
from sklearn.metrics import silhouette_score
range_n_clusters = [2, 3, 4] # clusters range you want to select
dataToFit = [[12,23],[112,46],[45,23]] # sample data
best_clusters = 0 # best cluster number which you will get
previous_silh_...
How do I remove all non alphanumeric characters from a string except dash?
... character class, or escaped with a backslash, to prevent being used for a range.
– Peter Boughton
Jul 9 '10 at 9:18
6
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How does this print “hello world”?
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Interesting!
Standard ASCII characters which are visible are in range of 32 to 127.
That's why you see 32, and 95 (127 - 32) there.
In fact each character is mapped to 5 bits here, (you can find what is 5 bit combination for each character), and then all bits are concatenated to form a ...
In Python, how does one catch warnings as if they were exceptions?
... the code will give you the following error: IndexError: list index out of range. If you're just looking to format or check properties of the captured warnings, then it's better to use a for-loop: for x in w: print(f'{x.category.__name__}: {str(x.message)}')
– Steven M. Mortime...
What happens to a detached thread when main() exits?
... Since every thread has its own stack (which is in the megabytes range on Linux), I would choose to detach the thread (so its stack will be freed as soon as it exits) and use some sync primitives if the main thread needs to exit (and for proper shutdown it needs to join the still running t...
What are the undocumented features and limitations of the Windows FINDSTR command?
... only way to match <CR> or <LF> is via a regex character class range expression that sandwiches the EOL characters.
[<TAB>-<0x0B>] matches <LF>, but it also matches <TAB> and <0x0B>
[<0x0C>-!] matches <CR>, but it also matches <0x0C> and ...