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How to create an object for a Django model with a many to many field?
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248
You cannot create m2m relations from unsaved objects. If you have the pks, try this:
sample_o...
Weighted random numbers
...e items have individual weights:
1) calculate the sum of all the weights
2) pick a random number that is 0 or greater and is less than the sum of the weights
3) go through the items one at a time, subtracting their weight from your random number, until you get the item where the random number is ...
Centering the pagination in bootstrap
...t;
<li><a href="?p=1" data-original-title="" title="">2</a></li>
</ul>
</div>
Bootstrap 4 has new class
<div class="text-xs-center">
<ul class="pagination">
<li><a href="?p=0" data-original-title="" title="">1&l...
Pandas: create two new columns in a dataframe with values calculated from a pre-existing column
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2 Answers
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Active
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What would cause an algorithm to have O(log n) complexity?
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290
I have to agree that it's pretty weird the first time you see an O(log n) algorithm... where o...
How to pip install a package with min and max version range?
... install a package with both a minimum version ( pip install package>=0.2 ) and a maximum version which should never be installed (theoretical api: pip install package<0.3 ).
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Java how to replace 2 or more spaces with single space in string and delete leading and trailing spa
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29 Answers
29
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View the Task's activity stack
...ivity:
Activities in Current Activity Manager State:
* TaskRecord{44d07218 #4 A android.task.contacts}
clearOnBackground=true numActivities=2 rootWasReset=true
affinity=android.task.contacts
intent={act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10600000 ...
How to host a Node.Js application in shared hosting [closed]
...ename the folder for simplicity
exec('mv node-v0.10.33-linux-x86 node');
2) The same way install your node app, e.g. jt-js-sample, using npm:
<?php
exec('node/bin/npm install jt-js-sample');
3) Run the node app from PHP:
<?php
//Choose JS file to run
$file = 'node_modules/jt-js-sample/in...
Efficient way to apply multiple filters to pandas DataFrame or Series
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250
Pandas (and numpy) allow for boolean indexing, which will be much more efficient:
In [11]: df...