大约有 31,100 项符合查询结果（耗时：0.0649秒） [XML]
How to center canvas in html5
...or a solution for a while now, but haven't found anything. Maybe it's just my search terms.
Well, I'm trying to make the canvas center according to the size of the browser window. The canvas is 800x600.
And if the window gets below 800x600, it should resize as well(but that's not very important at t...
How to make gradient background in android
...eate a gradient, you create an xml file in res/drawable. I am calling mine my_gradient_drawable.xml:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<gradient
android:type="linear"
android:angle="0"
...
Seeding the random number generator in Javascript
...om numbers like so:
rand();
rand();
Alternatively, simply choose some dummy data to pad the seed with, and advance the generator a few times (12-20 iterations) to mix the initial state thoroughly. This is often seen in reference implementations of PRNGs, but it does limit the number of initial sta...
HTML5: Slider with two inputs possible?
... I like ionRangeSlider a little better than the jQuery UI slider myself: ionden.com/a/plugins/ion.rangeSlider/en.html
– Charlotte
May 18 '16 at 14:45
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How does HashSet compare elements for equality?
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@Simon_Weaver it is. I do want to somehow avoid it in my hypothetical feature I was proposing.
– nawfal
Feb 1 '17 at 3:24
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How to create directory automatically on SD card
I'm trying to save my file to the following location
FileOutputStream fos = new FileOutputStream("/sdcard/Wallpaper/"+fileName);
but I'm getting the exception java.io.FileNotFoundException
However, when I put the path as "/sdcard/" it works.
...
How to output numbers with leading zeros in JavaScript [duplicate]
...e same way as a native version, should it ever come along? I can’t find my original comment. Hopefully it’s just a bug in Stack Overflow. If it was deleted, that would be a poor reflection of the state of things around here.
– Adam
Nov 4 '16 at 19:51
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How do I create directory if none exists using File class in Ruby?
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I added a core-only solution to my answer: Be aware, however, that it essentially reimplements FileUtils.mkdir_p (which is the method dedicated to your use case)
– Eureka
Sep 27 '12 at 9:12
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Numpy: Get random set of rows from 2D array
...-sample your data by a certain factor. Say I want to down-sample to 25% of my original data set, which is currently held in the array data_arr:
# generate random boolean mask the length of data
# use p 0.75 for False and 0.25 for True
mask = numpy.random.choice([False, True], len(data_arr), p=[0.75...
Import SQL file into mysql
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From the mysql console:
mysql> use DATABASE_NAME;
mysql> source path/to/file.sql;
make sure there is no slash before path if you are referring to a relative path... it took me a while to realize that! lol
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