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搭建高可用mongodb集群（三）—— 深入副本集内部机制 - 大数据 & AI - 清...
...为1是不显示的，这里标示出来。
rs.conf();
{
"_id" : "rs0",
"version" : 9,
"members" : [
{
"_id" : 0,
"host" : "192.168.1.136:27017" },
{
...
Iterating over each line of ls -l output
...ingle-column /home/bot/downloaded/Daily/*.gz
/home/bot/downloaded/Daily/Liq_DailyManifest_V3_US_20141119_IENT1.txt.gz
/home/bot/downloaded/Daily/Liq_DailyManifest_V3_US_20141120_IENT1.txt.gz
/home/bot/downloaded/Daily/Liq_DailyManifest_V3_US_20141121_IENT1.txt.gz
...
How to download image using requests
...flate). You can force it to decompress for you anyway by setting the decode_content attribute to True (requests sets it to False to control decoding itself). You can then use shutil.copyfileobj() to have Python stream the data to a file object:
import requests
import shutil
r = requests.get(settin...
How to make a countdown timer in Android?
...ic class MainActivity extends AppCompatActivity {
private String EVENT_DATE_TIME = "2020-12-31 10:30:00";
private String DATE_FORMAT = "yyyy-MM-dd HH:mm:ss";
private LinearLayout linear_layout_1, linear_layout_2;
private TextView tv_days, tv_hour, tv_minute, tv_second;
private H...
How to implement the factory method pattern in C++ correctly
...ude <memory>
class FactoryReleaseOwnership{
public:
std::unique_ptr<Foo> createFooInSomeWay(){
return std::unique_ptr<Foo>(new Foo(some, args));
}
};
// Factory retains object ownership
// Thus returning a reference.
#include <boost/ptr_container/ptr_vector.hpp&...
What's the use of ob_start() in php?
Is ob_start() used for output buffering so that the headers are buffered and not sent to the browser? Am I making sense here? If not then why should we use ob_start() ?
...
C++ map access discards qualifiers (const)
...k up a key without modifying the map.
find() returns an iterator, or const_iterator to an std::pair containing both the key (.first) and the value (.second).
In C++11, you could also use at() for std::map. If element doesn't exist the function throws a std::out_of_range exception, in contrast to o...
How to determine whether a given Linux is 32 bit or 64 bit?
...
Try uname -m. Which is short of uname --machine and it outputs:
x86_64 ==> 64-bit kernel
i686 ==> 32-bit kernel
Otherwise, not for the Linux kernel, but for the CPU, you type:
cat /proc/cpuinfo
or:
grep flags /proc/cpuinfo
Under "flags" parameter, you will see various value...
Installation Issue with matplotlib Python [duplicate]
...! If anyone wants to understand what happened, see matplotlib.org/faq/usage_faq.html#what-is-a-backend
– Andrey Shokhin
Dec 9 '14 at 11:25
...
Bin size in Matplotlib (Histogram)
...width in this example could be found by: (data.max() - data.min()) / number_of_bins_you_want. The + binwidth could be changed to just 1 to make this a more easily understood example.
– Jarad
Jan 22 '18 at 17:31
...