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How to determine if a record is just created or updated in after_save
...allback runs after the after_create or after_update callback (see guides.rubyonrails.org/active_record_callbacks.html).
– Mark
Jul 16 '14 at 14:16
3
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Vim: insert the same characters across multiple lines
...o insert the text on every single line in a range you can easily skip them by pressing extra j's.
Note that for large number of contiguous additions, the block approach or macro will likely be superior.
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Using ConfigurationManager to load config from an arbitrary location
...he first, which I don't like, is to re-implement the system section groups by copying them from machine.config into your own web.config e.g.
<sectionGroup name="system.net" type="System.Net.Configuration.NetSectionGroup, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"&...
Using cURL with a username and password?
...
You can also just send the user name by writing:
curl -u USERNAME http://server.example
Curl will then ask you for the password, and the password will not be visible on the screen (or if you need to copy/paste the command).
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Save the console.log in Chrome to a file
...e their existing console.log statements as bugout.log, that's what I meant by special syntax. It appears so far that there is no cross-browser way to do it a this time.
– Lukus
Apr 15 '15 at 5:09
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How to generate a create table script for an existing table in phpmyadmin?
... edited Jul 28 '17 at 6:59
byteC0de
4,53333 gold badges2323 silver badges5656 bronze badges
answered Jul 31 '12 at 11:27
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How do I fit an image (img) inside a div and keep the aspect ratio?
...ipt type="text/javascript">
(function() {
var img = document.getElementById('container').firstChild;
img.onload = function() {
if(img.height > img.width) {
img.height = '100%';
img.width = 'auto';
}
};
}());
</script>
CSS
#container {
width: 48px;
heigh...
Uint8Array to string in Javascript
...extEncoder and TextDecoder from the Encoding standard, which is polyfilled by the stringencoding library, converts between strings and ArrayBuffers:
var uint8array = new TextEncoder("utf-8").encode("¢");
var string = new TextDecoder("utf-8").decode(uint8array);
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Break when a value changes using the Visual Studio debugger
...Breakpoint -> New Data Breakpoint ...
Address: &(this->m_value)
Byte Count: 4 (Because int has 4 bytes)
Now, we can resume the program. The debugger will stop when the value is changed.
You can do the same with inherited classes or compound classes.
class B
{
private:
A m_a;
...
Traverse all the Nodes of a JSON Object Tree with JavaScript
...this,[i,o[i]]); to avoid the error W040: Possible strict violation. caused by the use of this
– Jasdeep Khalsa
Jul 3 '15 at 13:37
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