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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 fgrep -A 5 -...
Prevent unit tests but allow integration tests in Maven
...out skipping failsafe tests.
Property value seems to magically default to false -->
<skipTests>${skip.surefire.tests}</skipTests>
</configuration>
</plugin>
This allows you to run mvn verify -Dskip.surefire.tests and only surefire, not failsa...
Detail change after Git pull
...ction of the git-rev-parse man page), so that you can do things like
See all of the changes: git diff master@{1} master
See the changes to a given file: git diff master@{1} master <file>
See all the changes within a given directory: git diff master@{1} master <dir>
See the summary of c...
jQuery remove all list items from an unordered list
I forgot the jQuery command that will clear all list elements from a list. I did a bit of searching, done it a bunch of times before, but just simply forgot the command.
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What is the purpose of shuffling and sorting phase in the reducer in Map Reduce Programming?
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First of all shuffling is the process of transfering data from the mappers to the reducers, so I think it is obvious that it is necessary for the reducers, since otherwise, they wouldn't be able to have any input (or input from every ...
How to add pandas data to an existing csv file?
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Thanks for the answer. This will allow me append new df on row-wise. But could you let me know how can I append the new df on column-wise?
– datanew
Nov 9 '18 at 21:30
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How can I use Autolayout to set constraints on my UIScrollview?
... Apple describes in the Technical Note.
I also had a lot of trouble originally getting Auto Layout to work with UIScrollView. The key to getting it to work is making sure that all of the items in the scroll view, taken together, have constraints that eventually link to all sides of the scroll view ...
Set padding for UITextField with UITextBorderStyleNone
... neat little hack to set the left padding for this exact situation.
Basically, you set the leftView property of the UITextField to be an empty view of the size of the padding you want:
UIView *paddingView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 5, 20)];
textField.leftView = paddingView;
...
How to add local .jar file dependency to build.gradle file?
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If you really need to take that .jar from a local directory,
Add next to your module gradle (Not the app gradle file):
repositories {
flatDir {
dirs 'libs'
}
}
dependencies {
implementation name: 'gson-2.2.4'
}
...
If strings are immutable in .NET, then why does Substring take O(n) time?
...t tiny substrings from tiny strings, so how the complexity grows asymptotically is completely irrelevant.
The long answer is:
An immutable data structure built such that operations on an instance permit re-use of the memory of the original with only a small amount (typically O(1) or O(lg n)) of co...