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Efficient evaluation of a function at every cell of a NumPy array
..._arr = np.frompyfunc(f, 2, 1)
vf = np.vectorize(f)
arr = np.linspace(0, 1, 10000)
%timeit f_arr(arr, arr) # 307ms
%timeit f_arr(arr, arr) # 450ms
I have also tested larger samples, and the improvement is proportional. For comparison of performances of other methods, see this post
...
【最全】CSS响应式布局的5种实现方式 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ze: 10px; 时，此时 1rem = 10px，所以 box 盒子的宽高分别为：100px 和 200px;
当我们把 html 中 font-size: 20px; 时，此时 1rem = 20px,此时 box 盒子的宽高就为 200px 和 400px;
2、实际开发中如何适配，如何将设计稿对应的 px 单位转换为 rem 单...
Install a .NET windows service without InstallUtil.exe
...= 0x40,
Interrogate = 0x80,
UserDefinedControl = 0x100,
Delete = 0x00010000,
StandardRightsRequired = 0xF0000,
AllAccess = (StandardRightsRequired | QueryConfig | ChangeConfig |
QueryStatus | EnumerateDependants | Start | Stop |...
How do I programmatically “restart” an Android app?
...ext.ALARM_SERVICE);
mgr.set(AlarmManager.RTC, System.currentTimeMillis() + 100, mPendingIntent);
System.exit(0);
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Modify tick label text
...eturn 'pos is 6'
else:
return x
data = np.random.normal(0, 1, 1000)
fig, ax = plt.subplots()
ax.hist(data, bins=25, edgecolor='black')
ax.xaxis.set_major_formatter(mticker.FuncFormatter(update_ticks))
plt.show()
Caveat! x is the value of the tick and pos is its relative position in ...
Virtual Memory Usage from Java under Linux, too much memory used
...the memory map of the "Hello World" program; the entire memory map is over 100 lines long, and it's not unusual to have a thousand-line list.
0000000040000000 36K r-x-- /usr/local/java/jdk-1.6-x64/bin/java
0000000040108000 8K rwx-- /usr/local/java/jdk-1.6-x64/bin/java
0000000040eba000 ...
Convert PDF to image with high resolution
... \
-density 150 \
-trim \
test.pdf \
-quality 100 \
-flatten \
-sharpen 0x1.0 \
24-18.jpg
It results in the left image. Compare this to the result of my original command (the image on the right):
(To really see and appreciate the differences be...
Java JTable setting Column Width
...
Try adding setMaxWidth(10000) to see if that makes a difference.
– Eddie
Jun 5 '09 at 4:03
1
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What are database normal forms and can you give examples? [closed]
...
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IT101 | 2009-1 | 100 | Programming |
IT101 | 2009-2 | 100 | Programming |
IT102 | 2009-1 | 200 | Databases |
IT102 | 2010-1 | 150 | Databases |
IT103 | 2009-2 | 120 | Web Design |...
Find a string by searching all tables in SQL Server Management Studio 2008
... to narrow the search scope
USE DATABASE_NAME
DECLARE @SearchStr nvarchar(100) = 'SEARCH_TEXT'
DECLARE @Results TABLE (ColumnName nvarchar(370), ColumnValue nvarchar(3630))
SET NOCOUNT ON
DECLARE @TableName nvarchar(256), @ColumnName nvarchar(128), @SearchStr2 nvarchar(110)
SET @TableName = ''
S...