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Save modifications in place with awk
...ing output). Therefore, by the time someprocess gets launched and wants to read from the file, there is no data for it to read.
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How to Update Multiple Array Elements in mongodb
...pdate each item individually
(events.0.handled events.1.handled
...) or...
Read the document, do the edits
manually and save it replacing the
older one (check "Update if
Current" if you want to ensure
atomic updates)
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How to do what head, tail, more, less, sed do in Powershell? [closed]
...
Get-Content (alias: gc) is your usual option for reading a text file. You can then filter further:
gc log.txt | select -first 10 # head
gc -TotalCount 10 log.txt # also head
gc log.txt | select -last 10 # tail
gc -Tail 10 log.txt # also tail (since PSv3), al...
Is modern C++ becoming more prevalent? [closed]
...yone, but to a large extent, I agree, most people who have a choice have already gone for C# or Java or other such languages.
– jalf
Feb 11 '09 at 18:06
3
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What's the safest way to iterate through the keys of a Perl hash?
...t suited to your needs.
If you just want the keys and do not plan to ever read any of the values, use keys():
foreach my $key (keys %hash) { ... }
If you just want the values, use values():
foreach my $val (values %hash) { ... }
If you need the keys and the values, use each():
keys %hash; # ...
Pushing to Git returning Error Code 403 fatal: HTTP request failed
...m and just figured out what's cause.
Github seems only supports ssh way to read&write the repo, although https way also displayed 'Read&Write'.
So you need to change your repo config on your PC to ssh way:
edit .git/config file under your repo directory
find url=entry under section [remote ...
Immutability of Strings in Java
...
have you perchance every tried to program in C? Just read the primer on pointers and you'll understand coobird's answer perfectly.
– Ryan Fernandes
Oct 12 '09 at 2:58
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Setting variable to NULL after free
...pointer bugs. If a dangling pointer is accessed after it is freed, you may read or overwrite random memory. If a null pointer is accessed, you get an immediate crash on most systems, telling you right away what the error is.
For local variables, it may be a little bit pointless if it is "obvious" t...
Accessing MP3 metadata with Python [closed]
... from the source folder.
Relevant examples from the website are below.
Reading the contents of an mp3 file containing either v1 or v2 tag info:
import eyeD3
tag = eyeD3.Tag()
tag.link("/some/file.mp3")
print tag.getArtist()
print tag.getAlbum()
print tag.getTitle()
Read an mp3 file (tra...
How can I pass command-line arguments to a Perl program?
...guments as input files, you can just pass them in and then use <> to read their contents.
If they have a different meaning, you can use GetOpt::Std and GetOpt::Long to process them easily. GetOpt::Std supports only single-character switches and GetOpt::Long is much more flexible. From GetOpt:...