大约有 13,700 项符合查询结果(耗时:0.0331秒) [XML]
Pandas - Get first row value of a given column
...
To select the ith row, use iloc:
In [31]: df_test.iloc[0]
Out[31]:
ATime 1.2
X 2.0
Y 15.0
Z 2.0
Btime 1.2
C 12.0
D 25.0
E 12.0
Name: 0, dtype: float64
To select the ith value in the Btime column you could use:
In ...
Is there any way to post events to Google Analytics via server-side API? [closed]
... $aParams['qt'] = 0;
//Client ID
$aParams['cid'] = substr(md5($_SERVER['REMOTE_ADDR'].$_SERVER['HTTP_USER_AGENT']), 0, 8);
//User ID
//$aParams['uid'] = '';
//Session Control
//$aParams[''] = '';
//IP Override
$aParams['uip'] = $_SERVER['REMOTE_ADDR'];
//U...
Django-Admin: CharField as TextArea
...eld( widget=forms.Textarea )
class Meta:
model = Cab
class Cab_Admin( admin.ModelAdmin ):
form = CabModelForm
The form attribute of admin.ModelAdmin is documented in the official Django documentation. Here is one place to look at.
...
Error handling with node.js streams
...eam module
instantiate ( or inherit from) the Transform class
implement a _transform method which takes a (chunk, encoding, callback).
The chunk is your data. Most of the time you won't need to worry about encoding if you are working in objectMode = true. The callback is called when you are done...
How to keep a .NET console app running?
...ed as volatile, there is the definite possibility that subsequent reads to _quitFlag in the while loop would be optimized away, leading to an infinite loop.
– Adam Robinson
Apr 6 '10 at 16:51
...
Javascript - removing undefined fields from an object [duplicate]
...}
const newObject = Object.keys(obj).reduce((acc, key) => {
const _acc = acc;
if (obj[key] !== undefined) _acc[key] = obj[key];
return _acc;
}, {})
console.log(newObject)
// Object {a: 1}
share
...
How do I add a margin between bootstrap columns without wrapping [duplicate]
...
<div class="row info-panel">
<div class="col-md-4" id="server_1">
<div class="server-action-menu">
Server 1
</div>
</div>
</div>
CSS
.server-action-menu {
background-color: transparent;
background-image: linear-gradient(...
Swift - Convert to absolute value
...alue.magnitude) // prints: 5
#2. Get absolute value of an Int from abs(_:) method
Swift has a global numeric function called abs(_:) method. abs(_:) has the following declaration:
func abs<T>(_ x: T) -> T where T : Comparable, T : SignedNumeric
Returns the absolute value of the g...
Python integer incrementing with ++ [duplicate]
...ot seem to completely replace C++'s ++ operator.
– Dr_Zaszuś
Oct 12 '18 at 18:07
add a comme...
Read only the first line of a file?
...od (Python 2 docs, Python 3 docs):
with open('myfile.txt') as f:
first_line = f.readline()
Some notes:
As noted in the docs, unless it is the only line in the file, the string returned from f.readline() will contain a trailing newline. You may wish to use f.readline().strip() instead to rem...