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How do I preview emails in Rails?
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Daniel's answer is a good start, but if your email templates contain any dynamic data, it won't work. E.g. suppose your email is an order receipt and within it you print out @order.total_price - using the previous method the @order variable will be ni...
Should I always use a parallel stream when possible?
... i have a collection of objects that implement Runnable that I call start() to use them as Threads, is it ok to change that to using java 8 streams in a .forEach() parallelized ? Then i'd be able to strip the thread code out of the class. But are there any downsides?
– y...
Intro to GPU programming [closed]
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CUDA is an excellent framework to start with. It lets you write GPGPU kernels in C. The compiler will produce GPU microcode from your code and send everything that runs on the CPU to your regular compiler. It is NVIDIA only though and only works on 8-series c...
Batch script loop
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for /l is your friend:
for /l %x in (1, 1, 100) do echo %x
Starts at 1, steps by one, and finishes at 100.
Use two %s if it's in a batch file
for /l %%x in (1, 1, 100) do echo %%x
(which is one of the things I really really hate about windows scripting)
If you have multiple comm...
Internet Explorer 9 not rendering table cells properly
...oing something really silly; removing all the spaces betwen the <td> start and end tags and left justifying the HTML markup pertaining to my table. Basically, you want all of your <td> </td> on the same line, no spaces.
Example:
<table>
<tr class="grid_customer_normal"&g...
Python - write() versus writelines() and concatenated strings
...e character '\n' as glue. It is more efficient than using the + operator.
Starting from the same lines sequence, ending up with the same output, but using writelines():
lines = ['line1', 'line2']
with open('filename.txt', 'w') as f:
f.writelines("%s\n" % l for l in lines)
This makes use of a...
Find provisioning profile in Xcode 5
... using awk. This one-liner will find the first file that contains the name starting with "iOS Team".
awk 'BEGIN{e=1;pat="<string>"tolower("iOS Team")}{cur=tolower($0);if(cur~pat &&prev~/<key>name<\/key>/){print FILENAME;e=0;exit};if($0!~/^\s*$/)prev=cur}END{exit e}' *
He...
Debugging with command-line parameters in Visual Studio
... solution, remember to right click the project you wand to run and "Set as StartUp Project".
– Lion Lai
Apr 17 '17 at 7:51
1
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How to execute a Ruby script in Terminal?
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Just call: ruby your_program.rb
or
start your program with #!/usr/bin/env ruby,
make your file executable by running chmod +x your_program.rb
and do ./your_program.rb some_param
share...
What is the meaning of single and double underscore before an object name?
...al use" indicator. E.g. from M import * does not import objects whose name starts with an underscore.
Double Underscore (Name Mangling)
From the Python docs:
Any identifier of the form __spam (at least two leading underscores, at most one trailing underscore) is textually replaced with _class...