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grep a file, but show several surrounding lines?
I would like to grep for a string, but also show the preceding five lines and the following five lines as well as the matched line. How would I be able to do this?
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What does ':' (colon) do in JavaScript?
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yfeldblumyfeldblum
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Convert InputStream to byte array in Java
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You can use Apache Commons IO to handle this and similar tasks.
The IOUtils type has a static method to read an InputStream and return a byte[].
InputStream is;
byte[] bytes = IOUtils.toByteArray(is);
Internally this creates a ByteArrayOutputStream and copies the bytes to the outp...
Generate a random alphanumeric string in Cocoa
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Here's a quick and dirty implementation. Hasn't been tested.
NSString *letters = @"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
-(NSString *) randomStringWithLength: (int) len {
NSMutableString *randomString = ...
Find all files in a directory with extension .txt in Python
...th.join("/mydir", file))
or if you want to traverse directory, use os.walk:
import os
for root, dirs, files in os.walk("/mydir"):
for file in files:
if file.endswith(".txt"):
print(os.path.join(root, file))
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Node.js: printing to console without a trailing newline?
... edited Aug 30 '13 at 20:15
Akseli Palén
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answered May 27 '11 at 20:51
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What does it mean by select 1 from table?
...CT 1 FROM TABLE_NAME means, "Return 1 from the table". It is pretty unremarkable on its own, so normally it will be used with WHERE and often EXISTS (as @gbn notes, this is not necessarily best practice, it is, however, common enough to be noted, even if it isn't really meaningful (that said, I will...
How to set value of input text using jQuery
...have other script errors causing this to fail. The first example above works correctly in this demonstration.
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Save all files in Visual Studio project as UTF-8
... character encoding. I got a solution with mixed encodings and I want to make them all the same (UTF-8 with signature).
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How to update a value, given a key in a hashmap?
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map.put(key, map.get(key) + 1);
should be fine. It will update the value for the existing mapping. Note that this uses auto-boxing. With the help of map.get(key) we get the value of corresponding key, then you can update with you...