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Semicolon before self-invoking function? [duplicate]
...tion : f()
Putting a semicolon before the function prevents the function from becoming an argument to whatever precedes it when the parentheses become confused with function application.
Consider
var x = 42
(function () { ... })()
is the same as
var x = 42(function () { ... })()
but
var x...
Difference between two lists
...d duplicates to be preserved, it would probably be easiest to create a set from list2 and use something like:
var list3 = list1.Where(x => !set2.Contains(x)).ToList();
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Meaning of $? (dollar question mark) in shell scripts
...returns a status of 1:
true
echo $? # echoes 0
false
echo $? # echoes 1
From the manual: (acessible by calling man bash in your shell)
$? Expands to the exit status of the most recently executed foreground pipeline.
By convention an exit status of 0 means success, and non...
How do I catch a PHP fatal (`E_ERROR`) error?
...answer. I don't know why people are getting hung up on "you cannot recover from fatal errors"--the question didn't say anything about recovering.
– David Harkness
Nov 1 '11 at 21:53
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Why should I use version control? [closed]
...
Even if you work alone you can benefit from source control. Among others, for these reasons:
You don't lose anything. I never again commented out code. I simply delete it. It doesn't clutter my screen, and it isn't lost. I can recover it by checking out an old c...
Flatten an irregular list of lists
... can use a tuple of str and bytes to get the same effect there.
The yield from operator returns an item from a generator one at a time. This syntax for delegating to a subgenerator was added in 3.3
def flatten(l):
for el in l:
if isinstance(el, collections.Iterable) and not isinstance(...
Is there a way to run Bash scripts on Windows? [closed]
...ebugging and running Bash scripts, but this setup is completely standalone from Windows and you cannot use Bash scripts to interact with Windows features (such as processes and APIs) except for limited access to files through the DrvFS feature.
...
NuGet behind a proxy
...ments that they have been able to omit setting the http_proxy.password key from the command line, or delete it after-the-fact from the config file, and were still able to have NuGet function across the proxy.
If you find, however, that you must specify your password in the NuGet config file, remem...
What's quicker and better to determine if an array key exists in PHP?
...
Up from the dead... but I also re-ran the benchmark, and made a tweak so the second for loop has to initialize it's own counter and to clear the result array. It shows "isset || null" being faster. codepad.org/Np6oPvgS
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Convert a PHP object to an associative array
...
Just typecast it
$array = (array) $yourObject;
From Arrays:
If an object is converted to an array, the result is an array whose elements are the object's properties. The keys are the member variable names, with a few notable exceptions: integer properties are unaccess...