rWatcher_noRunFirstTime - wrap a Runnable & only run it if a value has changed [1027607]

17
LINES

< > BotCompany Repo | #1027607 // rWatcher_noRunFirstTime - wrap a Runnable & only run it if a value has changed

JavaX fragment (include) [tags: use-pretranspiled]

Libraryless. Click here for Pure Java version (2209L/14K).

static <A> Runnable rWatcher_noRunFirstTime(IF0<A> calc, Runnable r) {
  ret rWatcher_noRunFirstTime(calc, runnableToIVF1(r));
}

static <A> Runnable rWatcher_noRunFirstTime(IF0<A> calc, IVF1<A> r) {
  ret new Runnable {
    A value = callF(calc);
    
    run {
      A newValue = callF(calc);
      if (neq(value, newValue)) {
        value = newValue;
        callF(r, value);
      }
    }
  };
}

Author comment

Began life as a copy of #1024376

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Snippet ID:	#1027607
Snippet name:	rWatcher_noRunFirstTime - wrap a Runnable & only run it if a value has changed
Eternal ID of this version:	#1027607/2
Text MD5:	a4abbf6ee366fa5dc6cab141046038ee
Transpilation MD5:	716f7219dfb3f7c21b7ae64dfcd30655
Author:	stefan
Category:	javax
Type:	JavaX fragment (include)
Public (visible to everyone):	Yes
Archived (hidden from active list):	No
Created/modified:	2020-03-25 20:28:31
Source code size:	416 bytes / 17 lines
Pitched / IR pitched:	No / No
Views / Downloads:	215 / 296
Version history:	1 change(s)
Referenced in:	[show references]

1	static <A> Runnable rWatcher_noRunFirstTime(IF0<A> calc, Runnable r) {
2	ret rWatcher_noRunFirstTime(calc, runnableToIVF1(r));
3	}
4
5	static <A> Runnable rWatcher_noRunFirstTime(IF0<A> calc, IVF1<A> r) {
6	ret new Runnable {
7	A value = callF(calc);
8
9	run {
10	A newValue = callF(calc);
11	if (neq(value, newValue)) {
12	value = newValue;
13	callF(r, value);
14	}
15	}
16	};
17	}