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Why exactly is eval evil?
...be avoided unless strictly necessary. I’ve seen the same recommendation for several programming languages, but I’ve not yet seen a list of clear arguments against the use of eval . Where can I find an account of the potential problems of using eval ?
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How to disable visual “dots” in Visual Studio Editor
How can I can disable the "dots" for spaces in Microsoft Visual Studio?
5 Answers
5
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What Does This Mean in PHP -> or => [duplicate]
...s -> do and what does => do. And I'm not talking about the operators. They're something else, but nobody seems to know...
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Java Generics (Wildcards)
...eans the generic can be any type. A bounded wildcard (<? extends T> or <? super T>) places a restriction on the type by saying that it either has to extend a specific type (<? extends T> is known as an upper bound), or has to be an ancestor of a specific type (<? super T> is...
How can I split a shell command over multiple lines when using an IF statement?
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The line-continuation will fail if you have whitespace (spaces or tab characters) after the backslash and before the newline. With no such whitespace, your example works fine for me:
$ cat test.sh
if ! fab --fabfile=.deploy/fabfile.py \
--forward-agent \
--disable-known-hosts deplo...
Responsive font size in CSS
...n intervals where it starts breaking your design and creating scrollbars.
For example, try adding this inside your CSS at the bottom, changing the 320 pixels width for wherever your design starts breaking:
@media only screen and (max-width: 320px) {
body {
font-size: 2em;
}
}
Viewpo...
“render :nothing => true” returns empty plaintext file?
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UPDATE: This is an old answer for legacy Rails versions. For Rails 4+, see William Denniss' post below.
Sounds to me like the content type of the response isn't correct, or isn't correctly interpreted in your browser. Double check your http headers to see...
How efficient is locking an unlocked mutex? What is the cost of a mutex?
In a low level language (C, C++ or whatever): I have the choice in between either having a bunch of mutexes (like what pthread gives me or whatever the native system library provides) or a single one for an object.
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MPICH vs OpenMPI
Can someone elaborate the differences between the OpenMPI and MPICH implementations of MPI ?
Which of the two is a better implementation ?
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What is the difference between null and undefined in JavaScript?
...defined // true
null === null // true
and
null = 'value' // ReferenceError
undefined = 'value' // 'value'
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