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When saving, how can you check if a field has changed?
...o Model.objects.only('id') will lead to infinite recursion if Model has at least 3 fields. To solve this, we should remove deferred fields from saving in initial and change _dict property a bit
– gleb.pitsevich
Jun 6 '14 at 14:00
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Single Page Application: advantages and disadvantages [closed]
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@Ankit_Shah55 This may no longer be true (at least for google, who owns most of the search engine market share anyways). See "Deprecating our AJAX crawling scheme" from Google. My understanding is that you don't have to do anything special for Google to index your SPA a...
Re-entrant locks in C#
...dead locks.
If you really want to create deadlock simplest one requires at-least 2 resources.
Consider dog and the bone scenario.
1. A dog has full control over 1 bone so any other dog has to wait.
2. 2 dog with 2 bones are minimum required to create a deadlock when they lock their bones respectivel...
how to pass an integer as ConverterParameter?
...s to include the namespace for the basic system types and then to write at least the ConverterParameter binding in element form.
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JavaScript checking for null vs. undefined and difference between == and ===
...of undefined. null represents a null object reference, which, at the very least, means the variable holding it is meant for some type of 'object'. If it was a mistake, it was a good mistake. Anyway, in regards to the answer, the tip about undefined !== undefined during cross-window scripting is g...
Any way to force strict mode in node?
...erpreter directive.
#!/usr/bin/env node --use_strict
But currently (at least pre v0.9.x) it suffers the same problems described by the comments in @chad-scira's answer discuss.
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How to increase font size in a plot in R?
...fault!!! You need to use cex=2/3 to get the default font size. At the very least, this is the case under R 3.0.2 for Mac OS X, using PDF output.
You can change the default font size for PDF output using pointsize in pdf().
I suppose it would be far too logical to expect R to (a) actually do what i...
Authorize Attribute with Multiple Roles
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This example doesn't work, or at least not the way you might think. For example, while novel the ADMIN_OR_VIEWER role on the action is redundant because you will not be allowed to get to the Create method if you don't already have the ADMIN role. In this cas...
Android adding simple animations while setvisibility(view.Gone)
...of all devices support them. There is no reason not to use Animators or at least ViewCompat.animate() which is part of the support library and uses Animators on newer versions and View Animations on Android 3.0 and below.
– Xaver Kapeller
Jul 6 '16 at 8:33
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Wait until all jQuery Ajax requests are done?
...uccess, onFailure) method you could react when both requests succeed or at least one of them fails.
– skalee
Jun 8 '12 at 8:24
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