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Quick unix command to display specific lines in the middle of a file?
...two other solutions if you know the line number but nothing else (no grep possible):
Assuming you need lines 20 to 40,
sed -n '20,40p;41q' file_name
or
awk 'FNR>=20 && FNR<=40' file_name
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How can I get the line number which threw exception?
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Simple way, use the Exception.ToString() function, it will return the line after the exception description.
You can also check the program debug database as it contains debug info/logs about the whole application.
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Best cross-browser method to capture CTRL+S with JQuery?
...would like to be able to hit Ctrl + S to save a form. Is there a good cross-browser way of capturing the Ctrl + S key combination and submit my form?
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Does free(ptr) where ptr is NULL corrupt memory?
...his is because some C runtimes (I for sure remember it was the case on PalmOS) would crash when freeing a NULL pointer.
But nowadays, I believe it's safe to assume free(NULL) is a nop as per instructed by the standard.
shar...
Import CSV to SQLite
...I did it.
Make/Convert csv file to be seperated by tabs (\t) AND not enclosed by any quotes (sqlite interprets quotes literally - says old docs)
Enter the sqlite shell of the db to which the data needs to be added
sqlite> .separator "\t" ---IMPORTANT! should be in double quotes
sqlite> .i...
App Inventor 2 列表的函数式编程 · App Inventor 2 中文网
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映射块接受两个输入：1）输入列表和 2）作为表达式操作项的主体块。 映射块迭代列表并使用主体块将列表中的每个项目映射到新项目。
在本例中，输入列表是 Berry 的过滤列表，主体块将每个项目乘以 2。
第3步：缩减
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How do you remove Subversion control for a folder?
...s\test , and it contains folders and files that were checked out from a repository that no longer exists. How do I get Subversion to stop tracking that folder and any of the subfolders and files?
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Windows can't find the file on subprocess.call()
...e alternative (more secure for external input) is to get the PATH from the os.environ and search it manually.
– asmeurer
Jul 10 '17 at 2:18
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How to uninstall Jenkins?
...robably very simple, but I can't find any hint anywhere. So how one is supposed to do that, in general and specifically on Mac?
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Save bitmap to location
...ressFormat.PNG, 100, out); // bmp is your Bitmap instance
// PNG is a lossless format, the compression factor (100) is ignored
} catch (IOException e) {
e.printStackTrace();
}
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