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How to concatenate columns in a Postgres SELECT?
I have two string columns a and b in a table foo .
8 Answers
8
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NSString tokenize in Objective-C
What is the best way to tokenize/split a NSString in Objective-C?
9 Answers
9
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Automatic TOC in github-flavoured-markdown
...n every other commit. Possible additions to ~/.vimrc for this: change list character with let g:vmt_list_item_char = "-", include headings before TOC with let g:vmt_include_headings_before = 1. See the docs options section for more, e.g. how to change the fence text.
– Wolfson
...
MySQL root access from all hosts
...00): Duplicate entry '%-root' for key 'PRIMARY'
– Scriptlabs
Nov 16 '15 at 12:51
2
@Scriptlabs, c...
C++及Windows异常处理(try，catch; __try,__finally, __except) - C/C++ - ...
...ss File_handle {
FILE* p;
public:
File_handle(const char* n, const char* a)
{ p = fopen(n,a); if (p==0) throw Open_error(errno); }
File_handle(FILE* pp)
{ p = pp; if (p==0) throw Open_error(errno); }
~File_handle() { fclose(p); }
...
What is the curiously recurring template pattern (CRTP)?
...ter
{
public:
Writer() { }
~Writer() { }
void write(const char* str) const
{
static_cast<const T*>(this)->writeImpl(str); //here the magic is!!!
}
};
class FileWriter : public Writer<FileWriter>
{
public:
FileWriter(FILE* aFile) { mFile = aFile; ...
Reload Flask app when template file changes
...pplication when the templates change (or any other file), you can pass the extra_files argument to Flask().run(), a collection of filenames to watch: any change on those files will trigger the reloader.
Example:
from os import path, walk
extra_dirs = ['directory/to/watch',]
extra_files = extra_di...
Programmer Puzzle: Encoding a chess board state throughout a game
...e {
private final Node left;
private final Node right;
private final String label;
private final int weight;
private Node(String label, int weight) {
this.left = null;
this.right = null;
this.label = label;
this.weight = weight;
}
public Node(Node left, Node right) {
...
What does enctype='multipart/form-data' mean?
...ke.
application/x-www-form-urlencoded is more or less the same as a query string on the end of the URL.
multipart/form-data is significantly more complicated but it allows entire files to be included in the data. An example of the result can be found in the HTML 4 specification.
text/plain is i...
Insert a string at a specific index
How can I insert a string at a specific index of another string?
18 Answers
18
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