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What's the difference between eval, exec, and compile?
...differences:
eval accepts only a single expression, exec can take a code block that has Python statements: loops, try: except:, class and function/method definitions and so on.
An expression in Python is whatever you can have as the value in a variable assignment:
a_variable = (anything you can...
Returning value from Thread
...ad t = new Thread(foo); t.start(); t.join(); foo.getValue();. The t.join() blocks until the thread is finished.
– Daniel
Dec 16 '14 at 17:03
2
...
How do I clone a range of array elements to a new array?
... a simple "create target array, copy" approach will just copy the required block without touching the other elements, and in one go. The LINQ approach will walk through the array until it reaches the start point, then start taking values, building up a buffer (increasing the buffer size and copying ...
Inputting a default image in case the src attribute of an html is not valid?
...nothere.jpg">
<style>
img:before {
content: ' ';
display: block;
position: absolute;
height: 50px;
width: 50px;
background-image: url(ishere.jpg);
</style>
Demo: https://jsfiddle.net/uz2gmh2k/2/
As the fiddle shows, the broken image itself is not removed, bu...
CSS scrollbar style cross browser [duplicate]
...ipt>
Step 2: Then in the BODY of your page, add the below sample HTML block to your page.
<p><b>Scrollbar (default style) shows onMouseover</b></p>
<div id="demo1" style="width:300px; height:250px; padding:8px; background:lightyellow; border:1px solid gray; resize:b...
Get querystring from URL using jQuery [duplicate]
...l querystring elements, you'll want to add an 'if (i[0].length > 0)...' block...
– ericpeters0n
May 5 '16 at 19:57
3
...
CSS3 selector :first-of-type with class name?
...
https://codepen.io/adrianTNT/pen/WgEpbE
<style>
.user{
display:block;
background-color:#FFCC00;
}
.user:first-of-type{
background-color:#FF0000;
}
</style>
<p>Not working while this P additional tag exists</p>
<p class="user">A</p>
<p class="user"&...
Xamarin 2.0 vs Appcelerator Titanium vs PhoneGap [duplicate]
...indows Phone. Titanium actually has more in common with MacRuby/Hot Cocoa, PHP, or node.js than it does with PhoneGap, Adobe AIR, Corona, or Rhomobile. Titanium is built on two assertions about mobile development:
- There is a core of mobile development APIs which can be normalized across platforms...
App Inventor 2 试验组件 · App Inventor 2 中文网
...g:hover { color: #3773f5 } .feedback-pop .feedback-img { display: inline-block; width: 24px; height: 24px; margin-bottom: 4px; background: url(/static/images/feedback.svg) 50% / 100% auto no-repeat; } /*手机版：反馈浮动按钮收小*/ @media screen and (max-width: 700px) { .feedback-po...
Parse JSON in JavaScript? [duplicate]
... complex dependency relationships. Just remember that document.write will block page rendering, so place it at the bottom of your markup.
– huwiler
Jan 29 '14 at 3:18
3
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