大约有 37,000 项符合查询结果（耗时：0.0466秒） [XML]
Sending a notification from a service in Android
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109
Both Activity and Service actually extend Context so you can simply use this as your Context wi...
How to merge a transparent png image with another image using PIL
....png")
foreground = Image.open("test2.png")
background.paste(foreground, (0, 0), foreground)
background.show()
First parameter to .paste() is the image to paste. Second are coordinates, and the secret sauce is the third parameter. It indicates a mask that will be used to paste the image. If you p...
How do you sort an array on multiple columns?
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170
If owner names differ, sort by them. Otherwise, use publication name for tiebreaker.
function m...
How to install a specific version of a ruby gem?
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answered Jun 10 '13 at 14:37
mjsmjs
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Flex-box: Align last row to grid
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edited Oct 10 '18 at 4:58
Robin Métral
1,70588 silver badges2323 bronze badges
answered J...
Google Map API V3: How to add Custom data to markers
...ew google.maps.Marker({
map: map,
position: new google.maps.LatLng(0, 0),
customInfo: "Marker A"
});
var markerB = new google.maps.Marker({
map: map,
position: new google.maps.LatLng(-10, 0)
});
markerB.customInfo = "Marker B";
var markerC = new google.maps.Marker({
map: ma...
How to print a percentage value in python?
...supports a percentage floating point precision type:
>>> print "{0:.0%}".format(1./3)
33%
If you don't want integer division, you can import Python3's division from __future__:
>>> from __future__ import division
>>> 1 / 3
0.3333333333333333
# The above 33% example wo...
Efficiently checking if arbitrary object is NaN in Python / numpy / pandas?
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170
pandas.isnull() (also pd.isna(), in newer versions) checks for missing values in both numeric an...
How to draw polygons on an HTML5 canvas?
...lineTo (live demo):
var ctx = canvas.getContext('2d');
ctx.fillStyle = '#f00';
ctx.beginPath();
ctx.moveTo(0, 0);
ctx.lineTo(100,50);
ctx.lineTo(50, 100);
ctx.lineTo(0, 90);
ctx.closePath();
ctx.fill();
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Is there a version of JavaScript's String.indexOf() that allows for regular expressions?
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130
Combining a few of the approaches already mentioned (the indexOf is obviously rather simple), I ...