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What is the `data-target` attribute in Bootstrap 3?
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data-target is used by bootstrap to make your life easier. You (mostly) do not need to write a single line of Javascript to use their pre-made JavaScript components.
The data-target attribute should contain a CSS selector that points to the HTML Element that will be chan...
How do I make many-to-many field optional in Django?
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If you want to be able to specify ManyToMany relation without making it required just use blank=True:
class Group(models.Model):
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events = models.ManyToManyField(Event, blank=True)
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How do I know the current width of system scrollbar?
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If you want to know the size of a ScrollableControl minus the size of the scroll bar, the easiest way is to use the Control.ClientSize property.
From the documentation:
Gets or sets the height and width of the client are...
Incomplete type is not allowed: stringstream
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#include <sstream> and use the fully qualified name i.e. std::stringstream ss;
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What is the syntax for “not equal” in SQLite?
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How to get share counts using graph API
...it's very hard to use them in production without encountering said limits. If somebody has a different way to do it please let us know.
– njy
Aug 23 '16 at 20:43
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IntelliJ IDEA hint parameters of method
... @Arvidaa You can search in keymap by keystroke as well (magnifying glass with 3 blocks icon).
– mvd
Apr 2 '15 at 18:04
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How to enable Heap updates on my android client
...n one thing, you have to put in android:debuggable="true" in the AndroidManifest.xml (under Application tag) in order to see the process list appear under the available device/simulator (in DDMS). Even though you are not trying to run your application in debug mode.
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How to get the host name of the current machine as defined in the Ansible hosts file?
...t up a couple servers. There are a couple of tasks that I only want to run if the current host is my local dev host, named "local" in my hosts file. How can I do this? I can't find it anywhere in the documentation.
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MySQL: Invalid use of group function
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You need to use HAVING, not WHERE.
The difference is: the WHERE clause filters which rows MySQL selects. Then MySQL groups the rows together and aggregates the numbers for your COUNT function.
HAVING is like WHERE, only it happens after the COUNT value has been co...