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Convert Long into Integer
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Integer i = theLong != null ? theLong.intValue() : null;
or if you don't need to worry about null:
// auto-unboxing does not go from Long to int directly, so
Integer i = (int) (long) theLong;
And in both situations, you might run into overflows (because a Long can store a wider ran...
Is there a print_r or var_dump equivalent in Ruby / Ruby on Rails?
...t;%= debug(yourobject) %> which will generate a YAML view of your data. If you want something in your log you should use logger.debug yourobject.inspect.
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Changing the image source using jQuery
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You can use jQuery's attr() function. For example, if your img tag has an id attribute of 'my_image', you would do this:
<img id="my_image" src="first.jpg"/>
Then you can change the src of your image with jQuery like this:
$("#my_image").attr("src","second.jpg");
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Passing arguments forward to another javascript function
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but using apply like this might screw up the scope of b (if it's some inner function of an object for example)
– vsync
May 25 '13 at 22:47
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Why doesn't GCC optimize a*a*a*a*a*a to (a*a*a)*(a*a*a)?
I am doing some numerical optimization on a scientific application. One thing I noticed is that GCC will optimize the call pow(a,2) by compiling it into a*a , but the call pow(a,6) is not optimized and will actually call the library function pow , which greatly slows down the performance. (In ...
Is #pragma once part of the C++11 standard?
...rtable way to avoid multiple header inclusions in C++ was/is to use the #ifndef - #define - #endif pre-compiler directives scheme also called macro-guard scheme (see code snippet below).
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How to remove a lua table entry by its key?
...nality includes renumbering the indices, which your override would not do. If you do want to add your function to the table function set, then I'd probably name it something like table.removekey() or some such.
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Apply pandas function to column to create multiple new columns?
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But what do you do if you have 50 columns added like this rather than 6?
– max
Nov 4 '15 at 23:21
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How to keep indent for second line in ordered lists via CSS?
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If you have multiple-line list items, and need consistent vertical spacing, the solution is to add vertical border-spacing to the ol selector, e.g. border-spacing: 0 3px; Normal padding on the table-cell does not work because...
How to change the output color of echo in Linux
... Stack Overflow\n"
which prints love in red.
From @james-lim's comment, if you are using the echo command, be sure to use the -e flag to allow backslash escapes.
# Continued from above example
echo -e "I ${RED}love${NC} Stack Overflow"
(don't add "\n" when using echo unless you want to add add...