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Rails: How do I create a default value for attributes in Rails activerecord's model? [duplicate]
...ter_initialize couldn't easily be moved to before_validation, before_save, etc. Chances are that eventually one of the devs on your team will execute something like MyModel.all.each perhaps for bulk processing of some kind, and thus run this initialization logic MyModel.count num of times.
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How to use filter, map, and reduce in Python 3
...f noiters(*funcs):
if not funcs:
funcs = [map, filter, zip] # etc
from functools import reduce
globals()[reduce.__name__] = reduce
for func in funcs:
globals()[func.__name__] = lambda *ar, func = func, **kwar: list(func(*ar, **kwar))
try:
yield
finall...
Cannot set some HTTP headers when using System.Net.WebRequest
...et the property to the right value. ContentLength, ContentType, UserAgent, etc, all need to be set this way.
IMHO, this is a shortcoming on MS part...setting the headers via Headers.Add() should automatically call the appropriate property behind the scenes, if that's what they want to do.
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How to intercept click on link in UITextView?
...
}
2) Wherever you set up your textview, do this:
//init, viewDidLoad, etc
textView.linkDetectDelegate = self
//outlet
@IBOutlet weak var textView: QuickDetectLinkTextView!
//change ClassName to your class
extension ClassName: QuickDetectLinkTextViewDelegate {
func tappedLink() {
p...
Eclipse java debugging: source not found
...ample.
Classes, from dependencies coming from another plugins (maven, PDE, etc.). In this case, it is up to the plugin how the source will be provided.
PDE will require that each plugin have corresponding XXX.source bundle, which contains the source of the plugin. More information can be found her...
Should methods that throw RuntimeException indicate it in method signature?
...the callers is likely to be able to handle (such as a NPE due to bad input etc.)
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How to sparsely checkout only one single file from a git repository?
...y one file)
Richard Gomes points (in the comments) to "How do I clone, fetch or sparse checkout a single directory or a list of directories from git repository?"
A bash function which avoids downloading the history, which retrieves a single branch and which retrieves a list of files or direct...
“java.lang.OutOfMemoryError : unable to create new native Thread”
...k if there is a maxTasks limit. If there is, you can remove it by editing /etc/systemd/system.conf, adding a config: DefaultTasksMax=infinity
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Can I use git diff on untracked files?
...no-index untracked_file_1 untracked_file_2 to get git diff syntax coloring etc. on diffs ... beautiful.
– Colin D Bennett
Sep 30 '13 at 21:56
42
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Access lapply index names inside FUN
...ion: lapply creates calls of the form FUN(X[[1L]], ...), FUN(X[[2L]], ...) etc. So the argument it passes is X[[i]] where i is the current index in the loop. If we get this before it's evaluated (i.e., if we use substitute), we get the unevaluated expression X[[i]]. This is a call to [[ function, wi...