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Update a dataframe in pandas while iterating row by row
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You should assign value by df.ix[i, 'exp']=X or df.loc[i, 'exp']=X instead of df.ix[i]['ifor'] = x.
Otherwise you are working on a view, and should get a warming:
-c:1: SettingWithCopyWarning: A value is trying to be set on a copy of a slice from...
Use space as a delimiter with cut command
...uments before passing them to the command being invoked.
(a) is answered by a quote from the POSIX guidelines for utilities (emphasis mine)
If the SYNOPSIS of a standard utility shows an option with a mandatory option-argument [...] a conforming application shall use separate arguments for tha...
How do I return multiple values from a function in C?
..., is that correct? (I'm a bit shaky on C) While the other method uses pass-by-reference and thus doesn't require allocating more memory. Of course, the struct could be returned via pointer and share that same benefit right? (making sure to allocate memory properly and all of that of course)
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var functionName = function() {} vs function functionName() {}
...nsistently between browsers. Strict mode (introduced in ES5) resolved this by scoping function declarations to their enclosing block.
'use strict';
{ // note this block!
function functionThree() {
console.log("Hello!");
}
}
functionThree(); // ReferenceError
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What is the proper way to URL encode Unicode characters?
...ut that doesn't seem like a wise choice since the scheme has been rejected by the W3C.
5 Answers
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Pointer arithmetic for void pointer in C
...pe (say int , char , float , ..) is incremented, its value is increased by the size of that data type. If a void pointer which points to data of size x is incremented, how does it get to point x bytes ahead? How does the compiler know to add x to value of the pointer?
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Create request with POST, which response codes 200 or 201 and content
... in one or more new resources being created. The primary resource created by the request is identified by either a Location header field in the response or, if no Location field is received, by the effective request URI.
This means that you would include a Location in the response header that giv...
Does deleting a branch in git remove it from the history?
...ee, it is a very different structure from svn where all branches and tags (by convention) live in separate 'folders' of the repository alongside the special 'trunk'.
If the branch was merged into another branch before it was deleted then all of the commits will still be reachable from the other bra...
Are Roslyn SyntaxNodes reused?
...p from a node in the tree to a character offset in the text.
Persistent.
By persistence I mean the ability to reuse most of the existing nodes in the tree when an edit is made to the text buffer. Since the nodes are immutable, there's no barrier to reusing them. We need this for performance; we ca...
I need to get all the cookies from the browser
...g document.cookie you will get a list of escaped key=value pairs seperated by a semicolon.
secret=do%20not%20tell%you;last_visit=1225445171794
To simplify the access, you have to parse the string and unescape all entries:
var getCookies = function(){
var pairs = document.cookie.split(";");
v...