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Why does the C++ STL not provide any “tree” containers?
Why does the C++ STL not provide any "tree" containers, and what's the best thing to use instead?
14 Answers
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What do @, - and + do as prefixes to recipe lines in Make?
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They control the behaviour of make for the tagged command lines:
@ suppresses the normal 'echo' of the command that is executed.
- means ignore the exit status of the command that is executed (normally, a non-zero exit status would stop that part of the build).
+ means 'execut...
How to send email to multiple recipients using python smtplib?
... this script. I was having a problem to send an email from a python script and with this piece of code, i can now send the email.
– fear_matrix
Jul 14 '15 at 10:36
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Configuring Log4j Loggers Programmatically
...ith
Logger.getRootLogger().getLoggerRepository().resetConfiguration();
and start with adding your own. You need log4j in the classpath of course for this to work.
Remark:
You can take any Logger.getLogger(...) you like to add appenders. I just took the root logger because it is at the bottom of...
Set opacity of background image without affecting child elements
... your image into an image editor, turn down the opacity, save it as a .png and use that instead.
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mongodb/mongoose findMany - find all documents with IDs listed in array
I have an array of _ids and I want to get all docs accordingly, what's the best way to do it ?
5 Answers
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Difference between json.js and json2.js
...mented.
// These forms are obsolete. It is recommended that JSON.stringify and
// JSON.parse be used instead.
if (!Object.prototype.toJSONString) {
Object.prototype.toJSONString = function (filter) {
return JSON.stringify(this, filter);
};
Object.prototype.parseJSON = function (...
How can I extract audio from video with ffmpeg?
I tried the following command to extract audio from video:
12 Answers
12
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C compiler for Windows? [closed]
.../29205033/… - But using MinGW in Windows does not solve the problems to handle LibVLC and Gstreamer's. By using MinGW crash the executables. Is there any better solution?
– user285594
Mar 23 '15 at 21:53
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Is there a short contains function for lists?
...m not in list:
# do something
It's work fine for lists, tuples, sets and dicts (check keys).
Note that this is an O(n) operation in lists and tuples, but an O(1) operation in sets and dicts.
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