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Grepping a huge file (80GB) any way to speed it up?
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Here are a few options:
1) Prefix your grep command with LC_ALL=C to use the C locale instead of UTF-8.
2) Use fgrep because you're searching for a fixed string, not a regular expression.
3) Remove the -i option, if you don't need it.
So your command becomes:
LC_ALL=C ...
Select N random elements from a List in C#
I need a quick algorithm to select 5 random elements from a generic list. For example, I'd like to get 5 random elements from a List<string> .
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Allowed memory size of 33554432 bytes exhausted (tried to allocate 43148176 bytes) in php
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- @panidarapu and @Don Jones: Depending on the amount of memory, and how this script is used, it could be dangerous to allow the change in memory usage in this way. Don, in your case, you can likely break the feed down into smaller chunks ...
Change directory command in Docker?
...f the use of '&&', it will only get to the final 'pip install' command if all the previous commands have succeeded.
In fact, since every RUN creates a new commit & (currently) an AUFS layer, if you have too many commands in the Dockerfile, you will use up the limits, so merging the RUNs...
how to view the contents of a .pem certificate
...exported a self-signed .pem certificate from my keystore. Is there a command to view the certificate details directly from the .pem file (not of the certificate in the keystore)?
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How do I show the changes which have been staged?
...s) against the current HEAD. --staged is a synonym for --cached.
--staged and --cached does not point to HEAD, just difference with respect to HEAD. If you cherry pick what to commit using git add --patch (or git add -p), --staged will return what is staged.
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Usage of EnsureSuccessStatusCode and handling of HttpRequestException it throws
...sage.EnsureSuccessStatusCode() ? It disposes of the Content of the message and throws HttpRequestException , but I fail to see how to programmatically handle it any differently than a generic Exception . For example, it doesn't include the HttpStatusCode , which would have been handy.
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Initializing a static std::map in C++
... implements these utilities is that it is neatly encapsulated in a library and the end user rarely needs to deal with the complexity.
– Steve Guidi
Nov 13 '09 at 18:09
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Onclick javascript to make browser go back to previous page?
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What's the action="action" part for? And is it valid html??
– ban-geoengineering
Apr 26 '17 at 18:34
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What methods of ‘clearfix’ can I use?
...ut. My sidebar is floated, so my container div fails to wrap the content and sidebar.
29 Answers
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