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How do I force Postgres to use a particular index?
...ate drives
As the documentation admits:
Storage that has a low random read cost relative to sequential, e.g. solid-state drives, might be better modeled with a lower value for random_page_cost.
According to the last point of this slide from a speak at PostgresConf 2018, random_page_cost shoul...
How to use PrimeFaces p:fileUpload? Listener method is never invoked or UploadedFile is null / throw
... So it's needless to specify them in such case.
Also note that you should read the file contents immediately inside the abovementioned methods and not in a different bean method invoked by a later HTTP request. This is because the uploaded file contents is request scoped and thus unavailable in a l...
Which Eclipse version should I use for an Android app?
...tudio, the official IDE for Android. For help transitioning your projects, read Migrate to Android Studio.
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Unable to find valid certification path to requested target - error even after cert imported
...tem.out.println();
System.out.println("No errors, certificate is already trusted");
} catch (SSLException e) {
System.out.println();
e.printStackTrace(System.out);
}
X509Certificate[] chain = tm.chain;
if (chain == null) {
System.out.println("Could no...
How do I get the real .height() of a overflow: hidden or overflow: scroll div?
...out .scrollHeight property refer to the docs:
The Element.scrollHeight read-only attribute is a measurement of the height of an element's content, including content not visible on the screen due to overflow. The scrollHeight value is equal to the minimum clientHeight the element would require in...
Why is `[` better than `subset`?
...Hadley Wickham of the dangers of subset (and functions like it) [here]. Go read it!
It's a somewhat long read, so it may be helpful to record here the example that Hadley uses that most directly addresses the question of "what can go wrong?":
Hadley suggests the following example: suppose we want ...
Coding in Other (Spoken) Languages
...where online. When a shop from, say Japan, writes code, would I be able to read it in English? Or do languages, like C, PHP, anything, have Japanese translations that they write?
...
逆向工程——二进制炸弹(CSAPP Project) - 操作系统(内核) - 清泛网 - 专注...
...可以看到%eax由于是调用者维护的寄存器，所以调用函数read_six_numbers时需要先入栈。0x8(%ebp)保存的应该是六个数字的地址。看了下read_six_numbers函数，基本上就是判断是否输入的数字为六个，所以重点还是phase_2函数本身。
在看到...
Secure Web Services: REST over HTTPS vs SOAP + WS-Security. Which is better? [closed]
... So instead of ensuring that the content of the communications can only be read by the right server it ensures that it can only be read by the right process on the server. Instead of assuming that all the communications in the securely initiated session are from the authenticated user each one has t...
Map vs Object in JavaScript
... well. With memory management objects also do seem to free earlier if I am reading the profile correctly which might be one benefit in favor of objects.
In Firefox for this particular benchmark it is a different story:
Object Set Took: 435
Object Update Took: 126
Object Get Took: 50
Object Delete To...