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How to determine whether code is running in DEBUG / RELEASE build?
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can I change this macro programatically at run time? I want to enable a button that switches to production APIs. On that button, I want to change DEBUG to 0 and display the message that user needs to restart the app. So next time it will use production APIs.
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Convert SQLITE SQL dump file to POSTGRESQL
...T commands, so these need to be removed.
You'll also want to check for datetime columns in the SQLite schema and change them to timestamp for PostgreSQL. (Thanks to Clay for pointing this out.)
If you have booleans in your SQLite then you could convert 1 and 0 to 1::boolean and 0::boolean (respectiv...
querySelector search immediate children
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Correct at the time of writing, but see @avetisk's answer for an updated method.
– lazd
Jan 15 '14 at 0:44
add a co...
How to get first character of string?
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Timing a single operation using console.time() is not a reasonable or accurate test of performance. Of COURSE there is no big difference between them when you only time a single operation. These methods do actually perform differently.
– Steph...
Are there strongly-typed collections in Objective-C?
...e).
Objective-C has dynamic typing as a feature, which means that the runtime doesn't care about the type of an object since all objects can receive messages. When you add an object to a built-in collection, they are just treated as if they were type id. But don't worry, just send messages to thos...
Linux - Replacing spaces in the file names
... with quotes(from awk); then the substituted name
xargs takes 2 lines at a time and passes it to mv
share
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impro
Can an Android NFC phone act as an NFC tag?
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At this time, I would answer "no" or "with difficulty", but that could change over time as the android NFC API evolves.
There are three modes of NFC interaction:
Reader-Writer: The phone reads tags and writes to them. It's not em...
Check free disk space for current partition in bash
...ho "Hostname: $(hostname)" >>$MAILMESSAGE
echo "Date & Time: $(date)" >>$MAILMESSAGE
# Email letter formation here:
echo -e "\n[ $(date +%Y%m%d_%H%M%S%Z) ] Current Status:\n\n" >>$MAILMESSAGE
cat $sMess >>$MAILMESSAGE
ec...
TypeError: 'str' does not support the buffer interface
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4 #always gives bytes.len not str.len
All this time you thought you were asking for the len of a string in py2, you were getting the length of the byte array from the encoding. That ambiguity is the fundamental problem with double-duty classes. Which version of any method...
What is the usefulness of `enable_shared_from_this`?
...e a shared_ptr the normal way before you call shared_from_this() the first time! This is really easy to get wrong! Before C++17 it is UB to call shared_from_this() before exactly one shared_ptr has been created the normal way: auto sptr = std::make_shared<S>(); or shared_ptr<S> sptr(new ...