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Python Regex - How to Get Positions and Values of Matches
...ing 'a1b2c3d4' I'd want to get the positions where it finds each letter. Ideally, I'd like to get the text of the match back too.
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How do I find if a string starts with another string in Ruby?
...ts 'abcdefg'.start_with?('abc') #=> true
[edit] This is something I didn't know before this question: start_with takes multiple arguments.
'abcdefg'.start_with?( 'xyz', 'opq', 'ab')
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What is a 'semantic predicate' in ANTLR?
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actions using plain code.
There are 3 types of semantic predicates:
validating semantic predicates;
gated semantic predicates;
disambiguating semantic predicates.
Example grammar
Let's say you have a block of text consisting of only numbers separated by
comma's, ignoring any white spaces. Yo...
How do I run a single test with Nose in Pylons
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Ahhh, the one combination I didn't try. sigh. Thanks!
– Ben
Sep 14 '10 at 17:10
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What is the EAFP principle in Python?
What is meant by "using the EAFP principle" in Python? Could you provide any examples?
3 Answers
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Angularjs Template Default Value if Binding Null / Undefined (With Filter)
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Turns out all I needed to do was wrap the left-hand side of the expression in soft brackets:
<span class="gallery-date">{{(gallery.date | date:'mediumDate') || "Various"}}</span>
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Perl flags -pe, -pi, -p, -w, -d, -i, -t?
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-n: Places a non-printing loop around your command.
-e: Allows you to provide the program as an argument rather
than in a file. You don't want to have to create a script
file for every little Perl one-liner.
-i: Modifies your input file in-place (making a backup of the
original). Handy ...
Image loaded event in for ng-src in AngularJS
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Here is an example how to call image onload http://jsfiddle.net/2CsfZ/2/
Basic idea is create a directive and add it as attribute to img tag.
JS:
app.directive('imageonload', function() {
return {
restrict: 'A',
link: function(scope, element, attrs) {
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REST response code for invalid data
...r conditional requests when using last-modified date and ETags.
403 - Forbidden is used when the server wishes to prevent access to a resource.
The only other choice that is possible is 422 - Unprocessable entity.
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How to Test a Concern in Rails
...ng to test model concerns, you won't be able to do things like test the validity of objects or invoke ActiveRecord callbacks unless you set up the database accordingly (because your dummy class won't have a database table backing it). Moreover, you'll want to not only test the concern but also test ...