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Is there a “do … while” loop in Ruby?
I'm using this code to let the user enter in names while the program stores them in an array until they enter an empty string (they must press enter after each name):
...
Matching an empty input box using CSS
... go with input:valid
#foo-thing:valid + .msg { visibility: visible!important; }
<input type="text" id="foo-thing" required="required">
<span class="msg" style="visibility: hidden;">Yay not empty</span>
See live on jsFiddle
OR negate using #foo-thing:invalid (...
Swap key with value JSON
...
function swap(json){
var ret = {};
for(var key in json){
ret[json[key]] = key;
}
return ret;
}
Example here FIDDLE don't forget to turn on your console to see the results.
ES6 versions:
static objectFlip(obj) {
const ret = {};
Object.keys(obj)...
Is C++14 adding new keywords to C++?
The C++ Standards Committee tends to shy away from adding new keywords to the language, yet with C++11 that was not the case. Some examples:
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Change SQLite default settings
...:
.headers on
.mode column
In a file called .sqliterc in the home directory of the user running sqlite.
(P.S. I found that in man sqlite3.)
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onConfigurationChanged not getting called
This morning I came up with a problem trying to handle the onConfigurationChanged event. The problem is that the method, which I override, is not getting called when I change the orientation of the phone. Not getting called at all.
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How can I rethrow an exception in Javascript, but preserve the stack?
In Javascript, suppose I want to perform some cleanup when an exception happens, but let the exception continue to propagate up the stack, eg:
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Using C# reflection to call a constructor
...
I don't think GetMethod will do it, no - but GetConstructor will.
using System;
using System.Reflection;
class Addition
{
public Addition(int a)
{
Console.WriteLine("Constructor called, a={0}", a);
}
}
class Test
{
static void Main()
{
Type ty...
Django Template Variables and Javascript
...ubstituted directly into the HTML. Do a view source; it isn't a "variable" or anything like it. It's just rendered text.
Having said that, you can put this kind of substitution into your JavaScript.
<script type="text/javascript">
var a = "{{someDjangoVariable}}";
</script>
This ...
In Android, how do I set margins in dp programmatically?
...ing on what layout you're using you should use RelativeLayout.LayoutParams or LinearLayout.LayoutParams.
And to convert your dp measure to pixel, try this:
Resources r = mContext.getResources();
int px = (int) TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_DIP,
yourdpmeasure,
...