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How to pick just one item from a generator?
... would like an item, use
next(g)
(or g.next() in Python 2.5 or below).
If the generator exits, it will raise StopIteration. You can either catch this exception if necessary, or use the default argument to next():
next(g, default_value)
...
Convert string to Python class object?
... user input to a Python function, I'd like to get a class object out of it if there's a class with that name in the currently defined namespace. Essentially, I want the implementation for a function which will produce this kind of result:
...
What is the preferred/idiomatic way to insert into a map?
I have identified four different ways of inserting elements into a std::map :
9 Answers
...
PHP array delete by value (not key)
...nt) instead. No biggie, but just wanted anyone who had a similar issue to know that they weren't alone
– Angad
Aug 26 '13 at 14:11
8
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If table exists drop table then create it, if it does not exist just create it
...
Just put DROP TABLE IF EXISTS `tablename`; before your CREATE TABLE statement.
That statement drops the table if it exists but will not throw an error if it does not.
s...
Which @NotNull Java annotation should I use?
...
package javax.annotation;
@TypeQualifierNickname
@Nonnull(when = When.UNKNOWN)
@Retention(RUNTIME)
public @interface Nullable {}
package org.checkerframework.checker.nullness.qual;
@Retention(RUNTIME)
@Target({TYPE_USE, TYPE_PARAMETER})
@SubtypeOf({})
@ImplicitFor(
literals = {LiteralKind....
pretty-print JSON using JavaScript
...
Pretty-printing is implemented natively in JSON.stringify(). The third argument enables pretty printing and sets the spacing to use:
var str = JSON.stringify(obj, null, 2); // spacing level = 2
If you need syntax highlighting, you might use some regex magic like so:
function...
How to convert PascalCase to pascal_case?
If I had:
31 Answers
31
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OceanBase使用libeasy原理源码分析：客户端 - 数据库(内核) - 清泛网 - 专...
... EASY_MESSAGE_SESSION_HEADER;
ev_tstamp timeout, now;
ev_timer timeout_watcher;
// 用于串入session list的链表节点
easy_list_t session_list_node;
//为了快速根据packet id定位到发送队列中的session...
How to declare a global variable in JavaScript?
...ct to define internal stuff for the plugin:
$.miniMenu.i = new Object();
Now I can just do $.miniMenu.i.globalVar = 3 or $.miniMenu.i.parseSomeStuff = function(...) {...} whenever I need to save something globally, and I still keep it out of the global namespace.
...