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MongoDB Aggregation: How to get total records count?
... $count: 'count'
}
]
}
]);
The result will be (with for ex 100 total results):
[
{
"paginatedResults":[{...},{...},{...}, ...],
"totalCount":[{"count":100}]
}
]
share
|
...
How to convert jsonString to JSONObject in Java
...m.google.gson.Gson;
public class TestObjectToJson {
private int data1 = 100;
private String data2 = "hello";
public static void main(String[] args) {
TestObjectToJson obj = new TestObjectToJson();
Gson gson = new Gson();
//convert java object to JSON format
String js...
Python function overloading
...t = Point(1,2)
>>> direction = Vector(1,1,1)
>>> speed = 100 #km/h
>>> acceleration = 5.0 #m/s
>>> script = lambda sprite: sprite.x * 2
>>> curve = Curve(3, 1, 4)
>>> headto = Point(100, 100) # somewhere far away
>>> add_bullet(sprite, ...
Selecting/excluding sets of columns in pandas [duplicate]
...ate a dataframe with columns A,B,C and D
df = pd.DataFrame(np.random.randn(100, 4), columns=list('ABCD'))
# include the columns you want
df[df.columns[df.columns.isin(['A', 'B'])]]
# or more simply include columns:
df[['A', 'B']]
# exclude columns you don't want
df[df.columns[~df.columns.isin(['C...
How do I get ruby to print a full backtrace instead of a truncated one?
... ~/.irbrc that includes the following line:
IRB.conf[:BACK_TRACE_LIMIT] = 100
This will allow you to see 100 stack frames in irb, at least. I haven't been able to find an equivalent setting for the non-interactive runtime.
Detailed information about IRB customization can be found in the Pickaxe ...
What is an IIS application pool?
...rt
of it to run under a corresponding w3wp.exe process. So you can run
100 websites all in a single w3wp.exe or 100 different w3wp.exe. E.g.
run 3 websites in same application pool(same w3wp.exe) to save memory
usage. ,run 2 different websites in two different application pools so
that eac...
Call int() function on every list element?
...port random
random.seed(10)
l = [str(random.randint(0, 99)) for i in range(100)]"""
>>> timeit.timeit('[int(v) for v in l]', setup)
116.25092001434314
>>> timeit.timeit('map(int, l)', setup)
106.66044823117454
Python 3 is over 4x faster by itself, but converting the map generator...
[since C++11] std::array的使用 - C/C++ - 清泛网 - 专注C/C++及内核技术
...运算符和初始化列表：
array<int, 3> a = {1, 2, 3};
array<int, 100> b = {1, 2, 3}; // a[0] ~ a[2] = 1, 2, 3; a[3] ~ a[99] = 0, 0, 0 ... 0;
array<int, 3> c; // c[0] ~ c[2] 未初始化，是垃圾值.
assignment
形式
说明
c = other
...
iOS Simulator failed to install the application
...
@Ankur just added your 100th vote.. Congrats on the Great answer badge
– Krishnabhadra
Sep 23 '13 at 7:10
2
...
通过FastCGI Cache实现服务降级 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...r;
fastcgi_cache_path
/tmp
levels=1:2
keys_zone=failover:100m
inactive=10d
max_size=10g;
upstream php {
server 127.0.0.1:9000;
server 127.0.0.1:9001;
}
server {
listen 80;
limit_conn perserver 1000;
server_name *.xip.io;
root /us...