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Rails migration for change column
... @QPaysTaxes up should contain what you want to change your column from and to, and down should contain how to reverse that change.
– DaveStephens
Jan 24 '16 at 14:02
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Is a Python dictionary an example of a hash table?
...n 3.7, it looks like there are 2E20 minus 1 possible hash values, in fact. From -1E20 minus 1 to (+)1E20 minus 1. Try hash('I wandered lonely as a cloud, that drifts on high o\'er vales and hills, when all at once, I saw a crowd, a host of golden daffodils.') This gives a 19-digit decimal - -4037225...
Example using Hyperlink in WPF
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IMHO the simplest way is to use new control inherited from Hyperlink:
/// <summary>
/// Opens <see cref="Hyperlink.NavigateUri"/> in a default system browser
/// </summary>
public class ExternalBrowserHyperlink : Hyperlink
{
public ExternalBrowserHyperlink...
AngularJS ng-if with multiple conditions
...ments into a function attached to the scope, thus removing that logic away from the html section.
– jmlopez
Nov 4 '15 at 0:41
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How to update a value, given a key in a hashmap?
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From Javadoc: "If the value for the specified key is present and non-null, attempts to compute a new mapping". You can use compute() instead, it will handle null values as well.
– Konstantin Milyutin
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json_encode() escaping forward slashes
I'm pulling JSON from Instagram:
5 Answers
5
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What does 'wb' mean in this code, using Python?
...d that the b mode only had an effect on Windows. That has now been removed from the documentation and binary mode "should be used for all files that don’t contain text".
– Daniel G
Oct 1 '19 at 18:21
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How to loop over files in directory and change path and add suffix to filename
...asename somepath .txt outputs the base part of somepath, with .txt removed from the end (e.g. /Data/file.txt -> file)
If you needed to run MyProgram with Data/file.txt instead of /Data/file.txt, use "${filename#/}" to remove the leading slash. On the other hand, if it's really Data not /Data yo...
Why does git revert complain about a missing -m option?
...ikely since git performs a merge automatically everytime I pull in changes from another developer) I have to do this for every single merge? Is this why git fans are so keen on rebasing, because revert is basically useless?
– Neutrino
Sep 17 '17 at 16:50
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Get elements by attribute when querySelectorAll is not available without using libraries?
...hat link states that support starts in IE11 even though it actually starts from IE8 - maybe this should be swapped to developer.mozilla.org/en-US/docs/Web/API/Element/… so it actually supports the answer...?
– Zze
Sep 12 '17 at 20:26
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