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How do I check if an array includes a value in JavaScript?
...lso use Array#indexOf, which is less direct, but doesn't require polyfills for outdated browsers.
Many frameworks also offer similar methods:
jQuery: $.inArray(value, array, [fromIndex])
Underscore.js: _.contains(array, value) (also aliased as _.include and _.includes)
Dojo Toolkit: dojo.indexOf(a...
javac not working in windows command prompt
...u can also tell which executable (if any) is being used with the command:
for %i in (javac.exe) do @echo %~$PATH:i
This is a neat trick similar to the which and/or whence commands in some UNIX-type operating systems.
shar...
ImportError: No module named pip
...
I had the same problem.
My solution:
For Python 3
sudo apt-get install python3-pip
For Python 2
sudo apt-get install python-pip
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Paste multiple columns together
...
no need for apply here; paste is vectorised, and that's more efficient
– baptiste
Jan 28 '13 at 21:49
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Execute the setInterval function without delay the first time
... setInterval call.
So an alternative method is to have foo trigger itself for subsequent calls using setTimeout instead:
function foo() {
// do stuff
// ...
// and schedule a repeat
setTimeout(foo, delay);
}
// start the cycle
foo();
This guarantees that there is at least an interv...
CSS styling in Django forms
...
Taken from my answer to:
How to markup form fields with <div class='field_type'> in Django
class MyForm(forms.Form):
myfield = forms.CharField(widget=forms.TextInput(attrs={'class' : 'myfieldclass'}))
or
class MyForm(forms.ModelForm):
class Meta:...
How to Free Inode Usage?
...
It's quite easy for a disk to have a large number of inodes used even if the disk is not very full.
An inode is allocated to a file so, if you have gazillions of files, all 1 byte each, you'll run out of inodes long before you run out of di...
Random row selection in Pandas dataframe
... n)]
Note: As of Pandas v0.20.0, ix has been deprecated in favour of loc for label based indexing.
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PHP script - detect whether running under linux or Windows?
...ues on Windows like WIN32, WINNT or Windows.
See as well: Possible Values For: PHP_OS and php_unameDocs:
if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
echo 'This is a server using Windows!';
} else {
echo 'This is a server not using Windows!';
}
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What's an easy way to read random line from a file in Unix command line?
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Thanks for the shuf tip, it's built-in in Fedora.
– Cheng
Dec 2 '10 at 2:52
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