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Select the values of one property on all objects of an array in PowerShell
...owerShell v5.1.18362.145
Comparing property-value extraction methods with 10000 input objects, averaged over 10 runs...
Factor Command Secs (10-run avg.)
------ ------- ------------------
1.00 $objects.Name ...
Image comparison - fast algorithm
...f images in your database
so even though it is going to be very fast up to 10000 images per second on the modern hardware.
If you need invariance to rotation, then a dominant gradient can be computed
for this small image, and then the whole coordinate system can be rotated to canonical
orientation, ...
What are the effects of exceptions on performance in Java?
...t;< 1;
// Will never be true
if ((i & 0xFFFFFFF) == 1000000000) {
System.out.println("You'll never see this!");
}
}
// Could in theory throw one, but never will
public void method2(int i) throws Exception {
value = ((value + i) / i) <...
List of Big-O for PHP functions
...ive a more realistic big-O. For example the different between N=1000 and N=100000 is only about 50% slow down.
isset( $array[$index] ) O(n) but really close to O(1) - it uses the same lookup as array_key_exists. Since it's language construct, will cache the lookup if the key is hardcoded, resulting...
Do zombies exist … in .NET?
... private static void GcCollect() { while (true) { Thread.Sleep(10000); GC.Collect(); } }`
– Sinix
Nov 20 '13 at 7:14
...
Why all the Active Record hate? [closed]
...bject" in the log view in your application will work for 100, 1000 or even 10000 log lines, but sooner or later you will have to optimize - and I bet in most cases, you will just use that small beautiful SQL SELECT statement in your app logic (which totally breaks the AR idea..), instead of wrapping...
Programmatically Lighten or Darken a hex color (or rgb, and blend colors)
... $G=hexdec($RGB[1]); $B=hexdec($RGB[2]); return '#'.substr(dechex(0x1000000+(round(($t-$R)*$p)+$R)*0x10000+(round(($t-$G)*$p)+$G)*0x100+(round(($t-$B)*$p)+$B)),1); }
– Kevin M
Apr 17 '15 at 3:07
...
LINGO使用指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...量约束;
@for (cai (i): number(1,i)+number(2,i)+number(5,i)<=ck(i)*10000/154);
@for (cai (i): number(3,i)+number(4,i)<=cy(i)*10000/154);
!产量任务约束;
@for (xie (i):
xnum (i)>= xsubject (i)*10000/154);
!铁含量约束;
@sum(cai (j):
number(1,j)*(crate(j)-30.5) )...
Two-way encryption: I need to store passwords that can be retrieved
...CS random), you must increase this parameter. I would suggest a minimum of 10000 for passwords (the more you can afford, the better, but it will add to the runtime)...
Data Integrity
The updated version uses ENCRYPT-THEN-MAC, which is a far better method for ensuring the authenticity of the encry...
What are the best JVM settings for Eclipse? [closed]
...nd actually everyone), -XX:CompileThreshold=5 is a very low value (default=10000). This value represents the number of method invocations/branches before compiling it. Too low a value will cause your CodeCache to fill up prematurely and the Console may report: CodeCache is full. Compiler has been di...