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How to force maven update?
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mvn clean install -U
-U means force update of snapshot dependencies. Release dependencies can't be updated this way.
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How do I lowercase a string in C?
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It's in the standard library, and that's the most straight forward way I can see to implement such a function. So yes, just loop through the string and convert each character to lowercase.
Something trivial like this:
#include <ctype.h>
for(int i = 0; str[i]; i++){
str[i]...
Using an if statement to check if a div is empty
...chance that there will be white space, then you can use $.trim() and check for the length of the content.
if( !$.trim( $('#leftmenu').html() ).length ) {
// ...
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How to create JSON string in JavaScript?
... +'}';
You can also use template literals in ES6 and above: (See here for the documentation)
var obj = `{
"name" : "Raj",
"age" : 32,
"married" : false,
}`;
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How can I overwrite a getter method in an ActiveRecord model?
I'm trying to overwrite a getter method for an ActiveRecord model. I have an attribute called name in the model Category , and I'd like to be able to do something like this:
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How efficient can Meteor be while sharing a huge collection among many clients?
...r that manage
subscriptions: the publish function, which defines the logic for what
data the subscription provides; the Mongo driver, which watches the
database for changes; and the merge box, which combines all of a
client's active subscriptions and sends them out over the network to the
client.
P...
Where are the PostgreSQL logs on macOS?
...brary/PostgreSQL/8.4/data/pg_log
Of course, you'll want to substitute 8.4 for whichever version number you're running.
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SensorUtil 传感器工具扩展：在后台和屏幕关闭时保持传感器工作 · App Inv...
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工作原理
前台服务
Android 限制后台应用的活动以节省电池。要在后台持续运行，应用必须启动前台服务。前台服务会在状态栏显示通知，告知用户应用正在后台运行。
传感器生命周期 ...
Is there a way to collapse all code blocks in Eclipse?
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You can change it to something else via Window -> Preferences, search for "Keys", then for "Collapse All".
To open all code blocks the shortcut is Ctrl+Shift+NUM_KEYPAD_MULTIPLY.
In the Eclipse extension PyDev, close all code blocks is
Ctrl + 9
To open all blocks, is Ctrl + 0
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How to save picture to iPhone photo library?
...one saving, otherwise you can pass in nil.
See the official documentation for UIImageWriteToSavedPhotosAlbum().
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