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How to convert Nonetype to int or string?
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we can use (value or 0) -- without the int type casting -- if we assured that value can only be a None or an int
– hashlash
Jun 14 '19 at 20:16
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How to check if a process id (PID) exists
...will have a race condition.
If you want to ignore the text output of kill and do something based on the exit code, you can
if ! kill $pid > /dev/null 2>&1; then
echo "Could not send SIGTERM to process $pid" >&2
fi
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What does “for” attribute do in HTML tag?
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The <label> tag allows you to click on the label, and it will be treated like clicking on the associated input element. There are two ways to create this association:
One way is to wrap the label element around the input element:
<label>Input here:
<input type...
Select TreeView Node on right click before displaying ContextMenu
...implest solution when it works. It worked for me. In fact, you should just cast sender as a TreeViewItem because if it's not, that's a bug.
– craftworkgames
Nov 8 '14 at 12:04
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Convert PDF to image with high resolution
I'm trying to use the command line program convert to take a PDF into an image (JPEG or PNG). Here is one of the PDFs that I'm trying to convert.
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iPhone Safari Web App opens links in new window
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+1 from me - used this.href rather than casting to a jQuery object, but thanks for this answer. Works on iOS6.
– Fenton
Sep 29 '12 at 20:12
17
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Android studio using > 100% CPU at all times - no background processes appear to be running
I've noticed Android Studio (when running) uses greater than 100% CPU at all times, even when it appears there are no background processes that the IDE is running (indexing, etc). I might suspect this were something specific to my box, but some fellow developers are encountering this as well.
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How can I make a Python script standalone executable to run without ANY dependency?
I'm building a Python application and don't want to force my clients to install Python and modules.
19 Answers
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Does the default constructor initialize built-in types?
...The behavior of () initializer is different in some respects between C++98 and C++03, but not in this case. For the above class C it will be the same: () initializer performs zero initialization of C::x.
Another example of initialization that is performed without involving constructor is, of course...
Postgres: SQL to list table foreign keys
...6485 is the oid of the table I'm looking at - you can get that one by just casting your tablename to regclass like:
WHERE r.conrelid = 'mytable'::regclass
Schema-qualify the table name if it's not unique (or the first in your search_path):
WHERE r.conrelid = 'myschema.mytable'::regclass
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