我正在使用VS Code它,它在使用时很有帮助Typescript,因为它会告诉您当前存在的问题,而无需进行转译。我正在使用Typescript,nodeJS效果非常好。
我遇到的唯一问题是所谓的“空/未定义检查函数”。
看这个例子:
class User {
public someProperty: string | undefined;
// ...
public get canDoSomething() {
return this.someProperty != undefined;
}
}
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let myUser: User = ...
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这很好用:
if (myUser.someProperty != undefined) {
// at this point myUser.someProperty is type string only (as it cannot be undefined anymore
}
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然而这失败了
if (myUser.canDoSomething) {
// because typescript still thinks that myUser.someProperty is string | undefined and not just string, even though …Run Code Online (Sandbox Code Playgroud) 好吧,我不是在调用方法或其他东西时问如何获取参数.
我想要这样的东西:
-(void)doSomethingWithType:(TYPE)type {
//do something
}
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并执行如下:
[self doSomethingWithType:int];
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要么
[self doSomethingWithType:BOOL];
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如何创建具有类型作为参数的方法/函数的参数?我的意思是任何类型.. :)
我不想创建一个int参数,我想创建一个int类型参数,在这里您将目标c类型作为参数而不是值或变量:)
谢谢!
我有以下配置:
location / {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-NginX-Proxy true;
proxy_pass http://localhost:3000; # this is where our node js app runs at
proxy_set_header Host $http_host;
proxy_cache_bypass $http_upgrade;
proxy_redirect off;
}
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哪个代理[SERVER_IP]/,localhost:3000以便它基本上将所有内容路由到 node js 应用程序。
然后我继续编写了另一个 nodejs 应用程序,它在 port 上运行5000,而不是3000:
location / {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-NginX-Proxy true;
proxy_pass http://localhost:3000; # this is where our node js app runs at
proxy_set_header Host $http_host;
proxy_cache_bypass $http_upgrade;
proxy_redirect …Run Code Online (Sandbox Code Playgroud) const struct mach_header *mach = _dyld_get_image_header(0);
struct load_command *lc;
struct segment_command_64 *sc64;
struct segment_command *sc;
if (mach->magic == MH_MAGIC_64) {
lc = (struct load_command *)((unsigned char *)mach + sizeof(struct mach_header_64));
printf("[+] detected 64bit ARM binary in memory.\n");
} else {
lc = (struct load_command *)((unsigned char *)mach + sizeof(struct mach_header));
printf("[+] detected 32bit ARM binary in memory.\n");
}
for (int i = 0; i < mach->ncmds; i++) {
if (lc->cmd == LC_SEGMENT) {
sc = (struct segment_command *)lc;
NSLog(@"32Bit: %s …Run Code Online (Sandbox Code Playgroud) 我有一个带有 3 个按钮的水平堆栈视图:音乐应用程序的后退、播放、前进。这是我当前的代码:
self.controlStackView.axis = .horizontal
self.controlStackView.distribution = .equalSpacing
self.controlStackView.alignment = .center
self.controlStackView.spacing = 10.0
self.controlStackView.translatesAutoresizingMaskIntoConstraints = false
self.contentView.addSubview(self.controlStackView)
self.controlStackView.topAnchor.constraint(equalTo: self.artworkImageView.bottomAnchor, constant: 10.0).isActive = true
self.controlStackView.centerXAnchor.constraint(equalTo: self.contentView.centerXAnchor).isActive = true
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这是做什么的,它按如下方式分布按钮(由于对齐而从中心开始):
[backward] - 10 spacing - [play] - 10 spacing - [forward]
我可以增加间距,但它仍然是固定的。因此,我设置前导和尾随锚点来定义堆栈视图的最大宽度:
self.controlStackView.leadingAnchor.constraint(equalTo: self.leadingAnchor).isActive = true
self.controlStackView.trailingAnchor.constraint(equalTo: self.trailingAnchor).isActive = true
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这对布局有何影响:
[left edge backward] - lots of spaaaaaaace - [centered play] - lots of spaaaaaaace - [right edge forward]
它分布在整个宽度上(并且中心到左侧和右侧之间有一个 .equalSpacing)。但这也没有帮助。本质上我的目标是拥有真正的相等间距,包括边缘。
假设我的可用宽度为 100,我的 3 个按钮分别为 10、20、10 - 这意味着还有 60 个剩余空间是空的。 …
objective-c ×2
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ios ×1
nginx ×1
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proxy ×1
swift ×1
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