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Find the nth occurrence of substring in a string
This seems like it should be pretty trivial, but I am new at Python and want to do it the most Pythonic way.
21 Answers
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Sequence contains no elements?
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Put a breakpoint on that line, or a Debug.Print before it, in both cases and see what ID contains.
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Unknown Column In Where Clause
...is evaluated backwards, from right to left. So the where clause is parsed and evaluate prior to the select clause. Because of this the aliasing of u_name to user_name has not yet occurred.
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How do I specify a password to 'psql' non-interactively?
I am trying to automate database creation process with a shell script and one thing I've hit a road block with passing a password to psql .
Here is a bit of code from the shell script:
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What is the canonical way to determine commandline vs. http execution of a PHP script?
...ave a PHP script that needs to determine if it's been executed via the command-line or via HTTP, primarily for output-formatting purposes. What's the canonical way of doing this? I had thought it was to inspect SERVER['argc'] , but it turns out this is populated, even when using the 'Apache 2.0 Han...
Run JavaScript code on window close or page refresh?
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There is both window.onbeforeunload and window.onunload, which are used differently depending on the browser. You can assing them either by setting the window properties to functions, or using the .addEventListener:
window.onbeforeunload = function(){
// Do...
How do I create multiple submit buttons for the same form in Rails?
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You can create multiple submit buttons and provide a different value to each:
<% form_for(something) do |f| %>
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<%= f.submit 'A' %>
<%= f.submit 'B' %>
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<% end %>
This will output:
<input type="submit" value="A" i...
How to get first N elements of a list in C#?
...t.Take(5);
Or to slice:
var secondFiveItems = myList.Skip(5).Take(5);
And of course often it's convenient to get the first five items according to some kind of order:
var firstFiveArrivals = myList.OrderBy(i => i.ArrivalTime).Take(5);
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In Sublime Text 2, how do I open new files in a new tab?
When I'm editing with files on the server, and I click to edit them, if I'm editing multiple files (say an HTML file and a CSS file) but they open in new windows, which, on my small laptop display is a little inconvenient.
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Conditional ng-include in angularjs
...suecomment-23539882 ; in current versions (1.2.*) you cannot use ng-switch and ng-include on the same element, so you need something like: <div ng-switch-when="true"><div ng-include="'something'"></div><//div>
– Maarten
Dec 16 '13 at 12:...