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Deleting DataFrame row in Pandas based on column value
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Will this cost more memory if df is large? Or, can I do it inplace?
– ziyuang
May 8 '15 at 13:21
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How do I do base64 encoding on iOS?
I'd like to do base64 encoding and decoding, but I could not find any support from the iPhone SDK . How can I do base64 encoding and decoding with or without a library?
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How do I associate a Vagrant project directory with an existing VirtualBox VM?
...agrantfile" to track the UUID of your VM. This file will not exist if a VM does not exist. The format of the file is JSON. It looks like this if a single VM exists:
{
"active":{
"default":"02f8b71c-75c6-4f33-a161-0f46a0665ab6"
}
}
default is the name of the default virtual machine (if...
How do I erase an element from std::vector by index?
I have a std::vector, and I want to delete the n'th element. How do I do that?
15 Answers
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How do I kill all the processes in Mysql “show processlist”?
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You need to kill them one by one, MySQL does not have any massive kill command. You can script it in any language, for example in PHP you can use something like:
$result = mysql_query("SHOW FULL PROCESSLIST");
while ($row=mysql_fetch_array($result)) {
$process_i...
Is quitting an application frowned upon?
...re the environment closes up the application as needed. Those users simply don't think about "terminating" the Android app, any more than they think about "terminating" a Web page or "terminating" a thermostat.
iPhone users are much the same way, in that pressing the iPhone button does not necessari...
Proper way to exit iPhone application?
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As doing this is an Apple no-no (may cause your app to be refused in the app-store for non-standard interface), consider August's answer as "the right one." FYI, this answer (Brett's) is correct for ALL C programs, and NSThread...
SQL left join vs multiple tables on FROM line?
..., and each department can have multiple employees.
Ok, so now you want to do the following:
List all the companies, and include all their departments, and all their employees. Note that some companies don't have any departments yet, but make sure you include them as well. Make sure you only ret...
How do I concatenate two strings in C?
How do I add two strings?
11 Answers
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Is there a Java reflection utility to do a deep comparison of two objects?
...ng class somewhere that is capable of taking two objects of the same type, doing a deep comparison, and saying if they're identical or not?
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