大约有 41,757 项符合查询结果（耗时：0.0409秒） [XML]
Understanding exactly when a data.table is a reference to (vs a copy of) another data.table
I'm having a little trouble understanding the pass-by-reference properties of data.table . Some operations seem to 'break' the reference, and I'd like to understand exactly what's happening.
...
Convert string to a variable name
I am using R to parse a list of strings in the form:
10 Answers
10
...
When are you supposed to use escape instead of encodeURI / encodeURIComponent?
When encoding a query string to be sent to a web server - when do you use escape() and when do you use encodeURI() or encodeURIComponent() :
...
Why use apparently meaningless do-while and if-else statements in macros?
In many C/C++ macros I'm seeing the code of the macro wrapped in what seems like a meaningless do while loop. Here are examples.
...
How to determine if a string is a number with C++?
I've had quite a bit of trouble trying to write a function that checks if a string is a number. For a game I am writing I just need to check if a line from the file I am reading is a number or not (I will know if it is a parameter this way). I wrote the below function which I believe was working s...
Git rebase: conflicts keep blocking progress
I have a git branch (called v4), that was made from master just yesterday. There were a couple of changes to master, that I want to get into v4. So, in v4, I tried to do a rebase from master, and one file keeps screwing things up: a one-line text file, that contains the version number. This file ...
preventDefault() on an tag
I have some HTML and jQuery that slides a div up and down to show or hide` it when a link is clicked:
11 Answers
...
PDO closing connection
Just a rather simple question with regards to PDO compared to MySQLi.
5 Answers
5
...
JavaScript single line 'if' statement - best syntax, this alternative? [closed]
It's been clearly put, although opinion none the less, that forgoing curly brackets on a single line if statement is not ideal for maintainability and readability.
...
Convert a string representation of a hex dump to a byte array using Java?
I am looking for a way to convert a long string (from a dump), that represents hex values into a byte array.
24 Answers
...