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Correct approach to global logging in Golang
...iple goroutines.
Pass around a pointer to that log.Logger?
log.New returns a *Logger which is usually an indication that you should pass the object around as a pointer. Passing it as value would create a copy of the struct (i.e. a copy of the Logger) and then multiple goroutines might wr...
How to list containers in Docker
...d:
docker ps -s
The content presented above is from docker.com.
In the new version of Docker, commands are updated, and some management commands are added:
docker container ls
It is used to list all the running containers.
docker container ls -a
And then, if you want to clean them all,
do...
What is the purpose of Android's tag in XML layouts?
... <merge> node is removed and its child view is added directly to the new parent.
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how to read System environment variable in Spring applicationContext
...s myProperties;
}
Note: Just remember to restart eclipse after setting a new environment variable
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Best way to track onchange as-you-type in input type=“text”?
...times the accepted answer could be changed after some years... This is the new accepted answer to me.
– Erick Petrucelli
Nov 25 '15 at 15:50
1
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Programmatically change input type of the EditText from PASSWORD to NORMAL & vice versa
...ge password to text and vice versa
mCbShowPwd.setOnCheckedChangeListener(new OnCheckedChangeListener() {
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// checkbox status is changed from uncheck to checked.
if (!isChecked) ...
Pointers in Python?
...
a = 1
b = a # copy of memory mechanism. up to here id(a) == id(b)
b = 2 # new address generation. therefore without pointer behaviour
a
>>> 1
Pointer assignation is a pretty useful tool for aliasing without the waste of extra memory, in certain situations for performing comfy code,
clas...
How to update SQLAlchemy row entry?
...ctions will then succeed and the others will fail and must retry (with the new state of the DB). But I might've misunderstood SERIALIZABLE.
– Ilja Everilä
Sep 28 '18 at 4:42
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Insert new column into table in sqlite?
I have a table with columns name , qty , rate . Now I need to add a new column COLNew in between the name and qty columns. How do I add a new column in between two columns?
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anchor jumping by using javascript
...
Because when you do
window.location.href = "#"+anchor;
You load a new page, you can do:
<a href="#" onclick="jumpTo('one');">One</a>
<a href="#" id="one"></a>
<script>
function getPosition(element){
var e = document.getElementById(element);
...