<div ng-controller="Controller"> Hello <input ng-model='name'> <hr/> <span ng-bind="name"></span> <br/> <span ng:bind="name"></span> <br/> <span ng_bind="name"></span> <br/> <span data-ng-bind="name"></span> <br/> <span x-ng-bind="name"></span> <br/> </div>上面的每一行同樣都是使用 ngBind 的意思。
if obj?.value console.log "obj exists, obj.value exists, obj.value isn't 0 and obj.value isn't ''"
console.log "obj.value? is true" if obj.value? console.log "obj.value is true" if obj.value
### Condition 1 obj = name: "aaa" value: 0 # obj.value? is true
### Condition 2 obj = name: "aaa" value: "" # obj.value? is true
### Condition 3 obj = name: "aaa" # NO OUTPUT.
### Condition 4 obj = name: "aaa" value: null # NO OUTPUT.
### Condition 5
obj =
name: "aaa"
value: {}
## obj.value? is true
## obj.value is true
### Condition 6 obj = name: "aaa" value: [] ## obj.value? is true ## obj.value is true
// if obj.value?
if(typeof value !== "undefined" && obj.value !== null) {
console.log("obj.value? is true");
}
// if obj.value
if(obj.value) {
console.log("obj.value is true");
}
var callback = function(element, index, context) { /* omitted */ }
第二個參數 thisArg 用來指定 callback 中 this 指到的物件。<manifest ... >
<uses-feature android:name="android.hardware.camera" />
...
</manifest>
<manifest ... >
<uses-feature android:name="android.hardware.camera"
android:required="true" />
...
</manifest>
private void sendTextToOtherApp(String text) {
Intent sendIntent = new Intent();
sendIntent.setAction(Intent.ACTION_SEND);
sendIntent.putExtra(Intent.EXTRA_TEXT, text);
sendIntent.setType("text/plain");
startActivity(Intent.createChooser(sendIntent, "Send text to..."));
}
[android-sdk 資料夾]/extras/google/google_play_services/libproject/google-play-services_lib/Ex:
workspace/
MyAndroidAppProject/
copied-google-play-services_lib/
