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Error-Handling in Swift-Language
...ry? summonDefaultDragon() else { ... }
Finally, you can decide that you know that error will not actually occur (e.g. because you have already checked are prerequisites) and use try! keyword:
let dragon = try! summonDefaultDragon()
If the function actually throws an error, then you'll get a run...
dplyr: “Error in n(): function should not be called directly”
...ons with masking functions, it is clear to use the "package::function" specification, like example below:
delay <- dplyr::summarise(by_tailnum,
count = n(),
dist = mean(distance, na.rm = TRUE),
delay = mean(arr_delay, na.rm = TRUE))
...
Unexpected results when working with very big integers on interpreted languages
...ll work in this case, since Python switches to long integers automatically if needed. And if that's not enough, it will switch to big integers as well.
– Alok Singhal
Aug 4 '13 at 19:37
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Define global variable in a JavaScript function
...ou literally have no evidence that the window object actually exists. You know nothing about how your code will be used in the future. It might be even used in the MongoDB environment or rino instead of your node. And the window object is also not visible even in the browser if you use web workers ...
Javascript and regex: split string and keep the separator
...
I was having similar but slight different problem. Anyway, here are examples of three different scenarios for where to keep the deliminator.
"1、2、3".split("、") == ["1", "2", "3"]
"1、2、3".split(/(、)/g) == ["1", "、", "2", "、", "3"]
"1、2、3"...
How to fix: android.app.RemoteServiceException: Bad notification posted from package *: Couldn't cre
...ferences changed. The integer that used to reference the correct drawable now referenced either the incorrect drawable or none at all (none at all - causing this crash)
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How do I convert from int to String?
...tClass extends java.lang.Object{
public TestClass();
Code:
0: aload_0
1: invokespecial #1; //Method java/lang/Object."<init>":()V
4: return
public static void main(java.lang.String[]);
Code:
0: iconst_5
1: istore_1
Initialise the StringBuilder:
2: ...
Regex: match everything but specific pattern
... example "ing packages <!--and web page<!-- asdasasdas--> editors now use--> Lorem Ipsum"
– MonsterMMORPG
Jan 31 at 13:09
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What's the difference between event.stopPropagation and event.preventDefault?
...
It would be helpful to know what the default action is for a button click so I can reason about why stopDefault() doesn't work the same way as stopPropagation(). If the default action isn't calling the onclick method what is it?
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Mockito - difference between doReturn() and when()
...r comes written down first that is. Most people read left to right; so you now have to constantly remember to reverse the return-when logic in your head.
– GhostCat
Feb 24 '17 at 13:40
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