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Visibility of global variables in imported modules
...l = None
if 'MYVAL' in os.environ:
myval = os.environ['MYVAL']
As an extra precaution, handle the case when MYVAL is not defined inside the module.
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Go > operators
...ther languages, but because Go is a safer language than C/C++ it does some extra work when the shift count is a number.
Shift instructions in x86 CPUs consider only 5 bits (6 bits on 64-bit x86 CPUs) of the shift count. In languages like C/C++, the shift operator translates into a single CPU instru...
What is the correct way to restore a deleted file from SVN?
...her changes once the merge is done before you commit. If you don't, those extra changes will also be reversed.
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css z-index lost after webkit transform translate3d
... When your elements are 3d, I would not expect a transform to put extra strain on the GPU. Calculations need to be made anyway. What are you basing this on?
– Micros
Jan 4 '18 at 12:48
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When should one use HTML entities?
...ing using utf-8 text, there are a few thing to watch for.
XML needs some extra lines to validate when using entities.
Some libraries do not play along nice with utf-8. For instance, PHP in some Linux distributions dropped full support for utf-8 in their regular expression libraries.
It is harder t...
Best way to get identity of inserted row?
...serted in the SQL code you sent to the database. If triggers go and create extra rows, they won't cause the wrong value to get returned. Hooray
IDENT_CURRENT returns the last ID that was inserted by anyone. If some other app happens to insert another row at an unforunate time, you'll get the ID of ...
How to properly override clone method?
... Java API developers do it. (Either Josh Bloch or Neal Gafter)
Here is an extract from openJDK, ArrayList class:
public Object clone() {
try {
ArrayList<?> v = (ArrayList<?>) super.clone();
v.elementData = Arrays.copyOf(elementData, size);
v.modCount = 0;
...
No Multiline Lambda in Python: Why not?
... This is a simple ambiguity that must be solved by adding an extra set of parens, something that exists in many places already, e.g. generator expressions surrounded by other arguments, calling a method on an integer literal (although this need not be the case since a function name can...
What is the difference between angular-route and angular-ui-router?
...owerful. It supports everything the normal ngRoute can do as well as many extra functions.
Here are some common reason ui-router is chosen over ngRoute:
ui-router allows for nested views and multiple named views. This is very useful with larger app where you may have pages that inherit from oth...
How to amend several commits in Git to change author
...TES
the --no-edit flag makes sure the git commit --amend doesn't ask an extra confirmation
when you use git rebase -i, you can manually select the commits where to change the author,
the file you edit will look like this:
pick 897fe9e simplify code a little
pick abb60f9 add new feature
exec g...