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What is std::promise?
...provides a result to a shared state") i.e. a promise is the thing that you set a result on, so that you can get it from the associated future.
The asynchronous provider is what initially creates the shared state that a future refers to. std::promise is one type of asynchronous provider, std::packag...
Canvas width and height in HTML5
...properties that correspond to the height="…" and width="…" attributes. Set them to numeric values in JavaScript code to resize your canvas. For example:
var canvas = document.getElementsByTagName('canvas')[0];
canvas.width = 800;
canvas.height = 600;
Note that this clears the canvas, though ...
How do I Search/Find and Replace in a standard string?
Is there a way to replace all occurrences of a substring with another string in std::string ?
9 Answers
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How do PHP sessions work? (not “how are they used?”)
...sions in PHP are started by using the session_start( ) function. Like the setcookie( ) function, the session_start( ) function must come before any HTML, including blank lines, on the page. It will look like this:
<?php session_start( );?><html><head>
....... etc
The session_sta...
How to assign name for a screen? [closed]
...ccomplished by using the default key bindings:
Ctrl+a, A
Which prompts:
Set windows title to:SESSIONTITLE
Change SESSIONTITLE by backspacing and typing in the desired title. To confirm the name change and list all titles.
Ctrl+a, "
...
How would you access Object properties from within an object method? [closed]
...s an object's properties from within an object method that is not a getter/setter method?
18 Answers
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ImageView 扩展：图片查看器扩展，支持缩放、双击缩放和动画缩放 · App In...
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ResetZoom 重置缩放()
将图片缩放重置为初始状态。
FitToScreen 适应屏幕()
将图片缩放到适应屏幕大小。
CenterImage 居中图片()
将图片居中显示。
属性
ScaleType 缩放类型
获取或设置图片的缩放类型。...
Can I list-initialize a vector of move-only type?
... editor after snippets, if snippets enabled
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StackExchange.using("snippets", function() {
createEditor();
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else {
createEditor();
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Trigger a keypress/keydown/keyup event in JS/jQuery?
...
You can trigger any of the events with a direct call to them, like this:
$(function() {
$('item').keydown();
$('item').keypress();
$('item').keyup();
$('item').blur();
});
Does that do what you're trying to do?
You should prob...
Simpler way to create dictionary of separate variables?
I would like to be able to get the name of a variable as a string but I don't know if Python has that much introspection capabilities. Something like:
...