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AngularJS performs an OPTIONS HTTP request for a cross-origin resource
...ng a web browser. Additionally,
for HTTP request methods that can cause side-effects on user data (in
particular; for HTTP methods other than GET, or for POST usage with
certain MIME types). The specification mandates that browsers
"preflight" the request, soliciting supported methods from t...
makefile execute another target
...ot a big deal to run more than one makefile instance since each command inside the task will be a sub-shell anyways. But you can have reusable methods using the call function.
log_success = (echo "\x1B[32m>> $1\x1B[39m")
log_error = (>&2 echo "\x1B[31m>> $1\x1B[39m" && exi...
git: difference between “branchname” and “refs/heads/branchname”
...
See, branchName needs to be fully resolved before GIT can actually identify it. The fully resolved name will be refs/heads/branchName.
One of the famous commandsgit checkout branchName actually automatically resolves it fully to identify where you want to checkout. Note that it does it aut...
Order of member constructor and destructor calls
...ed. The reason is that one object may use another, thus depend on it. Consider:
struct A { };
struct B {
A &a;
B(A& a) : a(a) { }
};
int main() {
A a;
B b(a);
}
If a were to destruct before b then b would hold an invalid member reference. By destructing the objects in the rev...
Why use armeabi-v7a code over armeabi code?
...application, but removing the armeabi-v7a binaries is generally not a good idea. If you need to reduce size, you might want to have two separate apks for older (armeabi) and newer (armeabi-v7a) devices.
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What does “Git push non-fast-forward updates were rejected” mean?
...using commands like git commit --amend or git rebase.
While you can override the remote by adding --force to the push command, you should only do so if you are absolutely certain this is what you want to do.
Force-pushes can cause issues for other users that have fetched the remote branch, and i...
Convert JsonNode into POJO
.../jackson-databind/javadoc/2.5/com/fasterxml/…
– David Tonhofer
Sep 13 '17 at 17:15
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What is the difference between a regular string and a verbatim string?
... var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
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How would I get a cron job to run every 30 minutes?
...rontab does not understand "intervals", it only understands "schedule"
valid hours: 0-23 -- valid minutes: 0-59
example #1
30 * * * * your_command
this means "run when the minute of each hour is 30" (would run at: 1:30, 2:30, 3:30, etc)
example #2
*/30 * * * * your_command
this means "run whe...
How can I get the list of files in a directory using C or C++?
How can I determine the list of files in a directory from inside my C or C++ code?
26 Answers
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