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How can I upgrade specific packages using pip and a requirements file?
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I ran the following command and it upgraded from 1.2.3 to 1.4.0
pip install Django --upgrade
Shortcut for upgrade:
pip install Django -U
Note: if the package you are upgrading has any requirements this command will additionally upgrade all the requirements to the...
How to initialize static variables
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If you have control over class loading, you can do static initializing from there.
Example:
class MyClass { public static function static_init() { } }
in your class loader, do the following:
include($path . $klass . PHP_EXT);
if(method_exists($klass, 'static_init')) { $klass::staticInit() }...
How do I scroll to an element using JavaScript?
... element is in the center of the screen, subtract (window.screen.height/2) from findPos
– Albert Renshaw
May 6 at 3:04
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Why do we need the “finally” clause in Python?
... @Stephen For one thing, finally code runs even if you return from the try block. In that case, you won't hit the except clause.
– Antimony
Feb 20 '19 at 7:43
add...
Ternary Operators in JavaScript Without an “Else”
... void(condition && (x = true) ) // keeps the assignment separate from the first value
– diamondsea
Mar 6 '16 at 4:36
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unbound method f() must be called with fibo_ instance as first argument (got classobj instance inste
...ference to the module into a different name; you already have a reference (from the import) and you can just use it. If you want a different name just use import swineflu as f.
Second, you are getting a reference to the class rather than instantiating the class.
So this should be:
import swinefl...
node.js: read a text file into an array. (Each line an item in the array.)
...s) substring does not copy data but creates a special SlicedString object (from a quick glance at the v8 source code). In any case here is a modification that avoids the mentioned substring (tested on a file several megabytes worth of "All work and no play makes Jack a dull boy"):
function readLine...
Modifying the “Path to executable” of a windows service
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If using this from PowerShell, ensure you use sc.exe, not a naked sc
– fiat
Oct 23 '17 at 5:23
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JavaScript: Create and save file [duplicate]
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@user1756980 - Yes. You would need to "Save To File" from that new tab.
– Jesse Chisholm
Jul 22 '14 at 17:44
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In Java, how do I check if a string contains a substring (ignoring case)? [duplicate]
...swer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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