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Replace only some groups with Regex
...o encapsulate everything inside groups, no matter if need to identify them or not. That way you can use them in your replacement string. For example:
var pattern = @"(-)(\d+)(-)";
var replaced = Regex.Replace(text, pattern, "$1AA$3");
or using a MatchEvaluator:
var replaced = Regex.Replace(text...
Rails: around_* callbacks
I have read the documentation at http://api.rubyonrails.org/classes/ActiveRecord/Callbacks.html , but don't understand when the around_* callbacks are triggered in relation to before_* and after_* .
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Where in an Eclipse workspace is the list of projects stored?
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Windows:
<workspace>\.metadata\.plugins\org.eclipse.core.resources\.projects\
Linux / osx:
<workspace>/.metadata/.plugins/org.eclipse.core.resources/.projects/
Your project can exist outside the workspace, but all Eclipse-...
How can I get a file's size in C? [duplicate]
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You need to seek to the end of the file and then ask for the position:
fseek(fp, 0L, SEEK_END);
sz = ftell(fp);
You can then seek back, e.g.:
fseek(fp, 0L, SEEK_SET);
or (if seeking to go to the beginning)
rewind(fp);
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How to override the properties of a CSS class using another CSS class
...kground-none { background: none; }
.background-none { background: none !important; }
The first two “win” by selector specificity; the third one wins by !important, a blunt instrument.
You could also organize your style sheets so that e.g. the rule
.background-none { background: none; }
win...
express 4.0 , express-session with odd warning message
I am trying to work through setting up a nodejs app using express 4.x. After stumbling through the middleware-removal issues, I finally got it working.
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Make Font Awesome icons in a circle?
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i.fa {
display: inline-block;
border-radius: 60px;
box-shadow: 0px 0px 2px #888;
padding: 0.5em 0.6em;
}
<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet" />
<i class="fa fa-wrench...
Scatterplot with marginal histograms in ggplot2
... In Matlab it is the scatterhist() function and there exist equivalents for R as well. However, I haven't seen it for ggplot2.
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Why can I change value of a constant in javascript
...now that ES6 is not standardized yet, but a lot of browsers currently support const keyword in JS.
7 Answers
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How do I use valgrind to find memory leaks?
How do I use valgrind to find the memory leaks in a program?
4 Answers
4
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