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Why use Abstract Base Classes in Python?
...lve all the problems. ABCs offer an intermediate solution between the free-form of Python and the bondage-and-discipline of a staticly-typed language.
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Simple logical operators in Bash
...executed in a separate subprocess, so any redirection, assignment, etc. performed inside the parentheses has no effect outside the parentheses.
With a leading dollar sign, $(…) is a command substitution: there is a command inside the parentheses, and the output from the command is used as part o...
Mercurial - all files that changed in a changeset?
...how the list of files. -p means show patch. You can also use a template to format the output to your taste.
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What is the difference between exit(0) and exit(1) in C?
... the value of status is zero or
EXIT_SUCCESS, an implementation-defined form of the status successful termination is
returned. If the value of status is EXIT_FAILURE , an implementation-defined form
of the status unsuccessful termination is returned. Otherwise the status returned is
implem...
getting the ng-object selected with ng-change
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This solution is good if you need to format the value. Using just the Select approach I couldn't format the value easily.
– mbokil
Apr 7 '16 at 15:53
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What does 'predicate' mean in the context of computer science? [duplicate]
...cide whether or not to feed the person.
Predicates are often found in the form of callbacks, but in general we can use the term for any function that returns a bool based on evaluation of the truth of an assertion.
For sorting, might want have the member function
bool Fruit::ComesAfter(Fruit x) ....
Inserting HTML into a div
...ative you can use insertAdjacentHTML - however I dig into and make some performance tests - (2019.09.13 Friday) MacOs High Sierra 10.13.6 on Chrome 76.0.3809 (64-bit), Safari 12.1.2 (13604.5.6), Firefox 69.0.0 (64-bit) ). The test F is only for reference - it is out of the question scope because we ...
HTML5 textarea placeholder not appearing
...y Aquarelle but just in case somebody is having this issue with other tag forms with no text such as inputs i'll leave this here:
If you have an input in your form and placeholder is not showing because a white space at the beginning, this may be caused for you "value" attribute. In case you are u...
C++ equivalent of java's instanceof
...inted out dynamic_cast doesn't come for free. A simple and consistently performing hack that handles most (but not all cases) is basically adding an enum representing all the possible types your class can have and check whether you got the right one.
if(old->getType() == BOX) {
Box* box = st...
Why does my JavaScript code receive a “No 'Access-Control-Allow-Origin' header is present on the req
...com/api/mycall',
headers: {
'Content-Type': 'application/x-www-form-urlencoded'
},
type: "POST", /* or type:"GET" or type:"PUT" */
dataType: "json",
data: {
},
success: function (result) {
console.log(result);
},
error: function () {
consol...