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Reshape three column data frame to matrix (“long” to “wide” format) [duplicate]
...
There are many ways to do this. This answer starts with what is quickly becoming the standard method, but also includes older methods and various other methods from answers to similar questions scattered around this site.
tmp <- data.frame(x=gl(2,3, labels=letters[...
Tool to convert Python code to be PEP8 compliant
...n several big companies. Was created later than yapf, but already has more starts at GitHub
yapf https://github.com/google/yapf Google code formatter
autopep8 https://github.com/hhatto/autopep8 build upon the
pycodestyle
sh...
Avoid web.config inheritance in child web application using inheritInChildApplications
...e in the connection string. This made the string unique and all of sudden started to fail.
Without doing any research on the exact reason for this, I have to assume that when the child application inherits the parents web.config values, it ignores identical key/value pairs.
We were able to solve ...
Share data between AngularJS controllers
...t;
Input should also be here: {{Person.name}}
</div>
//Script starts from here
<script>
var myApp = angular.module("myApp",[]);
//create SharedDataService
myApp.service('SharedDataService', function () {
var Person = {
name: ''
};
return Person;
});
//Firs...
How do I call setattr() on the current module?
... lookup. To defeat the optimization, forcing the dict you desire to exist, start the function with exec '': time a function with a couple substantial loops each way, and you'll see the importance of this core optimization to Python's performance.
– Alex Martelli
...
Why wasn't PyPy included in standard Python?
...eated running of compiled code that it becomes faster overall. This means startup times can be higher, and therefore PyPy isn't necessarily as efficient for running glue code or trivial scripts.
PyPy and CPython behavior is not identical in all respects, especially when it comes to "implementation ...
A variable modified inside a while loop is not remembered
...e=${arr[i]};
...
}
Variable $lines can be converted to an array without starting a new sub-shell. The characters \ and n has to be converted to some character (e.g. a real new line character) and use the IFS (Internal Field Separator) variable to split the string into array elements. This can be ...
Entity Framework rollback and remove bad migration
...ll migrations applied after the one specified will be down-graded in order starting with the latest migration applied first.
Step 2: Delete your migration from the project
remove-migration name_of_bad_migration
If the remove-migration command is not available in your version of Entity Framework, de...
What is non-blocking or asynchronous I/O in Node.js?
...
var startTime = new Date().getTime();
var getEndTime = () => {
var tempEndTime = new Date().getTime();
var second = (tempEndTime - startTime)/1000
return `took ${second} sec...to finish\n`
}
console.log('1: start ...
Difference between using Throwable and Exception in a try catch
...er get notified that an OOM happened, leaving you wondering why the server started behaving "funny"
– Bruno Grieder
Sep 10 '14 at 9:24
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