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Storing a Map using JPA
... your @MapKeyColumn to provide a length: @MapKeyColumn(name="name", length=100)
– Jon
Sep 9 '16 at 18:48
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How can I convert byte size into a human-readable format in Java?
...,000)
public static String humanReadableByteCountSI(long bytes) {
if (-1000 < bytes && bytes < 1000) {
return bytes + " B";
}
CharacterIterator ci = new StringCharacterIterator("kMGTPE");
while (bytes <= -999_950 || bytes >= 999_950) {
bytes /= 100...
How to clear MemoryCache?
...here is a Trim method.
So to clear all contents you'd just do
cache.Trim(100)
EDIT:
after digging some more, it seems that looking into Trim is not worth your time
https://connect.microsoft.com/VisualStudio/feedback/details/831755/memorycache-trim-method-doesnt-evict-100-of-the-items
How do I ...
What's the Android ADB shell “dumpsys” tool and what are its benefits?
...apacity: 500000
USB powered: true
status: 5
health: 2
present: true
level: 100
scale: 100
voltage:4201
temperature: 271 <---------- Battery temperature! %)
technology: Li-poly <---------- Battery technology! %)
2)Getting wifi informations
~$ adb shell dumpsys wifi
Output:
Wi-Fi is enable...
Generating random strings with T-SQL
...
while 0 < @length
begin
select @dice = rand(@seed) * 100
, @seed = (rand((@seed+@step)%2147483647)*2147483647);
if (@dice < 10) -- 10% special chars
begin
select @dice = rand(@seed) * len(@specials)+1
, @seed = (rand((@...
Makefile, header dependencies
...t file gets recompiled, every time a small change is made, ie, if you have 100 source / header files, and you make a small change to only one, all 100 get recompiled.
– Nicholas Hamilton
Jun 16 '14 at 12:37
...
How to create relationships in MySQL
... is the code try it though the first people to answer this question
they 100% provided great answers and please consider them all .
CREATE TABLE accounts(
account_id INT NOT NULL AUTO_INCREMENT,
customer_id INT( 4 ) NOT NULL ,
account_type ENUM( 'savings', 'credit' ) NOT NULL,
bal...
How does the HyperLogLog algorithm work?
... values: 344 and 387. You decided to have 16 buckets. So you have:
0101 011000 bucket 5 will store 1
0110 000011 bucket 6 will store 4
By having more buckets you decrease the variance (you use slightly more space, but it is still tiny). Using math skills they were able to quantify the error (wh...
Why is ArrayDeque better than LinkedList
... during the tests.
For each array size/Queue-implementation combination, 100 tests are run and average time-per-test is calculated.
Each tests consists of filling each queue with all objects, then removing them all.
Measure time in terms of milliseconds.
Test Result:
Below 10...
Is there any performance gain in indexing a boolean field?
...if there are relatively few records of one value. For example, if you have 1000 records and 10 of them are TRUE, then it would be useful if you searching with isok = 1
As Michael Durrant mentioned, it also makes writes slower.
EDIT: Possible duplication: Indexing boolean fields
Here it explains t...