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iOS开发过程中的各种tips - 更多技术 - 清泛网 - 专注C/C++及内核技术
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.mm文件相当于c++或者c文件
Safari其实没有把内存的缓存写到存储卡上
28.读取一般性文件
- (void)readFromTXT {
NSString *tmp;
NSArray *lines;//将文件转化为一行一行的
lines = [[NSString stringWithContentsOfFile:@"testFileReadLines.txt"] compo...
How to show multiline text in a table cell
...rap our content works fine, but due to the use of this table (exporting to excel), large #s of columns and rows balloon the size of the exported file and cause excel to crash upon reading the file. (odd, I know). Has anyone else seen this or have an idea for a solution?
– JoeBr...
Ruby off the rails
... exist for this purpose.
I highly recommend Googling "ruby dsl" for some excellent reading, but I would like to leave you with one post in particular. Russ Olsen wrote a two part blog post on DSLs. I saw him give a presentation on DSLs and it was very good. I highly recommend reading these posts.
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Standard deviation of a list
...of numpy.std is not correct. Given these values: 20,31,50,69,80 and put in Excel using STDEV.S(A1:A5) the result is 25,109 NOT 22,45.
– Jim Clermonts
Oct 1 '15 at 9:28
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Combine Date and Time columns using python pandas
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When I 'pd.read_excel' an Excel column that Excel identifies as "Time," pandas also reads it as "Time" automatically without any parsing argument required. Thanks for this solution. +1
– Saeed
Oct 14 '1...
What's so wrong about using GC.Collect()?
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So how about when you are using COM objects like MS Word or MS Excel from .NET? Without calling GC.Collect after releasing the COM objects we have found that the Word or Excel application instances still exist.
In fact the code we use is:
Utils.ReleaseCOMObject(objExcel)
' Call the...
服务器保持大量TIME_WAIT和CLOSE_WAIT的解决方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...说说TIME_WAIT和CLOSE_WAIT的区别，没想到越挖越深，这也是写博客总结的好处，总可以有意外的收获。
TIME_WAIT状态可以通过优化服务器参数得到解决，因为发生TIME_WAIT的情况是服务器自己可控的，要么就是对方连接的异常，要么...
Generate random numbers uniformly over an entire range
...values tend to correlate, and the sequence is deterministic). Knuth has an excellent (if hard-to-read) treatise on random number generators, and I recently found LFSR to be excellent and darn simple to implement, given its properties are OK for you.
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The Use of Multiple JFrames: Good or Bad Practice? [closed]
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@ryvantage "Should (Excel) be MDI?" Good question. I feel it should be offered to the user both ways (certainly not only in MDI form). For example: 1) I currently use TextPad, and by configuration at my choice, it opens separate instances, t...
Creating dataframe from a dictionary where entries have different lengths
...ile this does not directly answer the OP's question. I found this to be an excellent solution for my case when I had unequal arrays and I'd like to share:
from pandas documentation
In [31]: d = {'one' : Series([1., 2., 3.], index=['a', 'b', 'c']),
....: 'two' : Series([1., 2., 3., 4.], ind...