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Avoid duplicates in INSERT INTO SELECT query in SQL Server
...
Using NOT EXISTS:
INSERT INTO TABLE_2
(id, name)
SELECT t1.id,
t1.name
FROM TABLE_1 t1
WHERE NOT EXISTS(SELECT id
FROM TABLE_2 t2
WHERE t2.id = t1.id)
Using NOT IN:
INSERT INTO TABLE_2
(id, name)
SELECT t1.id,
...
HMAC-SHA1 in bash
...e solution, but mainly to prove that the results are the same, we can also call PHP's hmac_sha1() from the command line:
[me@home]$ echo '<?= hash_hmac("sha1", "value", "key") ?>' | php
57443a4c052350a44638835d64fd66822f813319
...
Method Resolution Order (MRO) in new-style classes?
... suppose to be two crossing edges, not a node and ^ signifies methods that call super())
class G():
def m(self):
print("G")
class F(G):
def m(self):
print("F")
super().m()
class E(G):
def m(self):
print("E")
super().m()
class D(G):
def m(se...
Get nodes where child node contains an attribute
...ize XPath Axes (https://www.w3schools.com/xml/xpath_axes.asp). More specifically, you are looking to use the descendants axes.
I believe this example would do the trick:
//book[descendant::title[@lang='it']]
This allows you to select all book elements that contain a child title element (regardle...
seek() function?
...
when calling seek from the beginning of the file, does it actually start 'seeking' from the beginning of the file each time?
– Theo Stefou
May 29 at 9:59
...
What's the difference between __PRETTY_FUNCTION__, __FUNCTION__, __func__?
...] = "function-name";
appeared, where function-name is the name of the lexically-enclosing function. This name is the unadorned name of the function.
Note that it is not a macro and it has no special meaning during preprocessing.
__func__ was added to C++ in C++11, where it is specified as contain...
How to open a new window on form submit
...ribute on the <form> tag with the second argument in the window.open call in the onsubmit handler.
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How to update Python?
... conda in your bin or install conda from PyPI. Then create another symlink called conda-activate to activate in the Anaconda/Miniconda root bin folder. Now Anaconda/Miniconda is just like Ruby RVM. Just use conda-activate root to enable Anaconda/Miniconda.
Portable Python is no longer being develope...
difference between use and require
...ier by not requiring you to spell out the namespace every time you want to call a function though it can also make a mess of things by creating namespace conflicts. A good middle ground between "use" and "require" is to only 'use' the functions from a namespace that you actually use.
for instance: ...
Performance of FOR vs FOREACH in PHP
...i = 0; $i < count($array); $i++) {
That's an expensive loop, since it calls count on every single iteration. So long as you're not doing that, I don't think it really matters...
As for the reference making a difference, PHP uses copy-on-write, so if you don't write to the array, there will be ...