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Deserializing a JSON into a JavaScript object
...N encoding,
or if it does not scrupulously validate all of its inputs,
then it could deliver invalid JSON text that could be carrying dangerous script.
The eval function would execute the script, unleashing its malice.
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Combine two ActiveRecord::Relation objects
... It doesn't act as an array, it converts your relation to an array. Then you can't use ActiveRecord methods on it like .where() anymore ...
– Augustin Riedinger
Jul 17 '13 at 13:17
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What are the differences between delegates and events?
... First I show how you can use delegates alone to do what Events do for us. Then I show how the same solution would work with an instance of EventHandler. And then I explain why we DON'T want to do what I explain in the first example. This post was inspired by an article by John Skeet.
Example 1: Us...
Java synchronized static methods: lock on object or class
... do we make that thread safe? Do we explicitly acquire a lock on the class then?
– baskin
Dec 9 '11 at 3:36
22
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How to delete a remote tag?
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If you have a remote tag v0.1.0 to delete, and your remote is origin, then simply:
git push origin :refs/tags/v0.1.0
If you also need to delete the tag locally:
git tag -d v0.1.0
See Adam Franco's answer for an explanation of Git's unusual : syntax for deletion.
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Pandas: drop a level from a multi-level column index?
...to just the middle level. I found that dropping the lowest (level [2]) and then the highest (level [0]) worked best. >>>df.columns = df.columns.droplevel(2) >>>df.columns = df.columns.droplevel(0)
– Kyle C
Feb 5 '19 at 18:36
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When to use Tornado, when to use Twisted / Cyclone / GEvent / other [closed]
...sign". If you are building something that is similar to a e-commerce site, then you should probably go with Django. It will get your work done quick. You dont have to worry about too many technology choices. It provides everything thing you need from template engine to ORM. It will be slightly opini...
find -exec a shell function in Linux?
... passing each item found as an argument:
#!/bin/bash
if [ ! $1 == "" ] ; then
echo "doing something with $1"
exit 0
fi
find . -exec $0 {} \;
exit 0
When you run the script by itself, it finds what you are looking for and calls itself passing each find result as the argument. When the scr...
“This project is incompatible with the current version of Visual Studio”
...Visual Studio
is due to an attempt to open a project targeting .Net 4.5, then the "solution" or workaround is to edit the .csproj file and change the TargetFrameworkVersion from "v4.5" to "v4.0". That at least allows the project to be loaded, although it may result in compiler errors if the progra...
How to create directory automatically on SD card
... is this "part" of @fixedd answer? His answer was to use File.mkdirs(). He then showed an example of using it.
– IAmGroot
Sep 7 '12 at 15:15
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