大约有 2,000 项符合查询结果（耗时：0.0213秒） [XML]
Select first 4 rows of a data.frame in R
... no male no
12 6.100 13 59.4 no male no
13 6.110 14 59.5 no male no
14 6.120 15 59.6 no male no
15 6.130 16 59.7 no male no
Let's say, you want to select the first 10 rows. The easiest way to do it would be data[1:10, ]...
What's the difference between Spring Data's MongoTemplate and MongoRepository?
...dating it...
With MongoTemplate it would look somewhat like this:
THREAD_001 THREAD_002
| |
|update(query("ID1"), Update().set("field1", "another string")) |update(query("ID1"), Updat...
Create JSON object dynamically via JavaScript (Without concate strings)
...
JavaScript
var myObj = {
id: "c001",
name: "Hello Test"
}
Result(JSON)
{
"id": "c001",
"name": "Hello Test"
}
share
|
improve this answer...
Why doesn't requests.get() return? What is the default timeout that requests.get() uses?
...meout parameter:
>>> requests.get('http://github.com', timeout=0.001)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
requests.exceptions.Timeout: HTTPConnectionPool(host='github.com', port=80): Request timed out. (timeout=0.001)
Note:
timeou...
How do I get an object's unqualified (short) class name?
...e are the updated test results with "SubstringStrChr" (saves up to about 0.001 s):
Reflection: 0.073065280914307 s ClassA
Basename: 0.12585079669952 s ClassA
Explode: 0.14593172073364 s ClassA
Substring: 0.060415267944336 s ClassA
SubstringStrChr: 0.059880912303925 s ClassA
...
No secret option provided to Rack::Session::Cookie warning?
...nswered Feb 12 '13 at 10:52
nbit001nbit001
22422 silver badges66 bronze badges
...
How to generate unique ID with node.js
...11e1-840d-7b25c5ee775a'
// Generate a v4 (random) id
uuid.v4(); // -> '110ec58a-a0f2-4ac4-8393-c866d813b8d1'
** UPDATE 3.1.0
The above usage is deprecated, so use this package like this:
const uuidv1 = require('uuid/v1');
uuidv1(); // -> '6c84fb90-12c4-11e1-840d-7b25c5ee775a'
const u...
ElasticSearch, Sphinx, Lucene, Solr, Xapian. Which fits for which usage? [closed]
...t;/p> content.",
...
[ and other fields ]
Sphinx query time:
0.001 sec.
Sphinx query time (1k concurrent):
=> 0.346 sec. (average)
=> 0.340 sec. (average of last 10 query)
MySQL query time:
"SELECT * FROM hb_posts WHERE id = 123;"
=> 0.001 sec.
MySQL query time (1k concu...
How to pass a single object[] to a params object[]
...swered Feb 18 '16 at 6:54
ACOMIT001ACOMIT001
45811 gold badge77 silver badges1515 bronze badges
...
What is the difference between a mutable and immutable string in C#?
... [1] class [mscorlib]System.Text.StringBuilder sb)
IL_0000: nop
IL_0001: ldstr "inital value"
IL_0006: stloc.0
IL_0007: ldstr "\nsecond value"
IL_000c: stloc.0
IL_000d: ldstr "\nthird value"
IL_0012: stloc.0
IL_0013: newobj instance void [mscorlib]System....